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MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
AT TIRUCHIRAPPALLI
DESIGN BASIS REPORT
C/7330/2014/R3
PROJECT
PROJECT: INDIAN INSTITUTE OF MANAGEMENT
Date: 8th May 2014
: INDIAN INSTITUTE OF MANAGEMENT CAMPUS AT TIRUCHIRAPPALLI.
CLIENT
: INDIAN INSTITUTE OF MANAGEMENT, TIRUCHIRAPPALLI NIT TRICHY CAMPUS (POST), THANJAVUR ROAD, TIRUCHIRAPPALLI - 620 015 ,
DESIGN ARCHITECT
: CHANDAVARKAR & THACKER CONSULTANTS PVT. LTD. ( C&T), 7, PALACE CROSS ROAD , BANGALORE – 560 020
1.
INTRODUCTION AND PROJECT DESCRIPTIONThe Indian Institute of Management, Tiruchirappalli is an educational campus. This project consists of following different unitsA) Academic Units – This unit consists of following different units – 1) 250 seater seminar room - Gr. Flr + Terrace 2) 120 seater class room - Gr. Flr + 1st +Terrace 3) 80 seater class room - Gr. Flr + 1st +Terrace 4) 50 seater class room - Gr. Flr + 1st +Terrace 5) Amphitheatre - Gr. Flr +Terrace 6) Faculty offices - Gr. Flr + 1st + 2nd +Terrace 7) Visitor/Faculty lounge - Gr. Flr + 1st + 2nd +Terrace 8) Multipurpose rooms etc. - Gr. Flr + 1st +Terrace 9) Connecting Corridor - Gr. Flr/1st Floor + Terrace 10) Arcade - Gr. Flr/1st Floor + Terrace
B) Residential Units – 1) 2) 3) 4) 5) 6) 7)
Students Hostel Married student hostel Staff Housing (Type A) Staff Housing (Type A) Faculty Housing Director’s Bungalow Handicapped Housing
- Gr. Flr + 1st to 3rd +Terrace - Stilt + 1st to 4th +Terrace - Gr. Flr.+ 1st to 3rd +Terrace - Gr. Flr.+ 1st to 3rd +Terrace - Gr. Flr + 1st +Terrace - Gr. Flr + 1st +Terrace - Gr. Flr +Terrace
------------------------------------------------------------------------------------------------------------------------ - 1 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
C) Other units – 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16)
Auditorium - Gr. Flr + 1st +Terrace Library - Basement + Gr. Flr + 1st to 3 rd +Terrace Sports complex - Gr. Flr + Terrace Dispensary - Gr. Flr + Terrace Entrance gate - Gr. Flr + Terrace Security Gate - Gr. Flr/1st Flr. + Terrace Community market - Gr. Flr +Terrace Estate office - Gr. Flr +1st+Terrace Daycare - Gr. Flr +Terrace Hostel Mess - Gr. Flr +Terrace Canteen - Gr. Flr +Terrace MDP ( Academic) - Gr. Flr + 1st +Terrace MDP ( Residential) - Gr. Flr + 1st to 3rd +Terrace . - Gr. Flr + 1st + 2nd + Terrace (with connecting bridge) Service units ( such as DG unit, Transformer, Water tanks, Sumps, Plant room etc.) Elevated water tank /Beacon-
Foundation system for all structures to be open isolated foundation with soil bearing capacities as follows (as per soil report dated 07.05.2014) – 1) SBC value 15 T/sq.m at 1.5m below NGL for Academic Block , Faculty housing, commercial complex, school , Estate office etc. 2) SBC value 30 T/sq.m at 2.5m below NGL for Auditorium, Block, library, Hostels, Mess hall, sports complex, non faculty apartments etc. 2.
DESIGN LOADS A) Super Imposed loads The imposed loads that are envisaged to act permanently (wherever applicable) are considered for analysis and design. These load values are based on IS: 875 (part-1)-1987 and general construction practice. Imposed load intensities –
Item Floor Finish ( 20mm thk tiles with 20mmthk cement mortar) Weathering Proof Course – 150mm thk brickbat coba with IPS finish False Ceiling with services Light weight partition on floor MEP Services External Glazing Toilet Sunk load ( consider 100 mm sunk) Solar load Roof sheeting Polycarbonate sheet/ skylight
Intensity in kN/m2 of plan area 1.00 3.00 1.00 1.00 0.25 2.00 2.00 2.00 0.15 0.15
------------------------------------------------------------------------------------------------------------------------ - 2 -
PROJECT: INDIAN INSTITUTE OF MANAGEMENT
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
AT TIRUCHIRAPPALLI
B) Live Loads The live load is assessed based on the occupancy classifications as per IS:875 (Part-2)1987 and are listed as below. Name of Structure
Occupancy Classification
UDL (KN/m2)
Academic Units
Class room & Lecture room
3.00
Academic Units
Seminar room room/ stage
5.00
Academic Units
Store room/ server room
5.00
Academic Units
Office, Reading room
4.00
Academic Units
Stairs, corridors, age
4.00
Academic Units Academic Units
/Auditorium/projector
Stack room/stack area (maximum height 2.2m) Stack room/stack area ( maximum height 3.2m)
6.00 8.00
Academic Units
Toilets & bath rooms
2.00
Academic Units
Sloping roof with slope less than 10 degree , access not provided except for maintenance
0.75
Academic Units
Flat Roof
1.50
Residential Units
All rooms and kitchens
2.00
Residential Units
Toilets & bath rooms
2.00
------------------------------------------------------------------------------------------------------------------------ - 3 -
PROJECT: INDIAN INSTITUTE OF MANAGEMENT
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
3.
AT TIRUCHIRAPPALLI
WIND LOADS The wind pressure has been calculated based on the data furnished below and other provisions laid in IS: 875 (Part 3)-1987 Basic Wind Speed
Vb
=
47 m/sec
Risk Coefficient
K1
=
1.04 (Probable Design life of structure is assumed as 75 years)
Terrain Category
=
3
Structure Class
=
Class B / C …. as per individual unit
Factor
K2
=
0.82 to 1.00 ….. as per individual unit
Topography factor
K3
=
1.0
Design Wind Speed and wind pressure can be calculated for individual units as per base dimensions and height of structure with reference to IS: 875 (part 3)-1987. AUDITORIUM BLOCK (SAMPLE CALCULATION) For Preliminary analysis/design, the wind pressure has been calculated based on the data furnished below and other provisions laid in IS: 875 (Part 3)-1987 Base dimension of the building along - L = 58m ; B = 38.3m Height of building (H) = 15.0m Basic Wind Speed Vb = 47 m/sec Risk Coefficient Terrain Category Structure Class Factor Topography factor
K1 K2 K3
= = = = =
1.04 3 Class C 0.87 1.0
DESIGN WIND SPEED (Vz) Vz = Vb .k1.k2.k3 = 47 x 1.04 x 0.87 x 1 = 42.52 m/s DESIGN WIND PRESSURE Pz = 0.6 x Vz2 = 0.6 x 42.52 x 42.52 = 1084.77 N/sq. m Force Co-efficient calculationForce Co-efficient (Cf) in X – direction Force Co-efficient (Cf) in Y – direction
= =
1.20 1.10
Considered Cf = 1.30 for ETAB analysis for both direction. ------------------------------------------------------------------------------------------------------------------------ - 4 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
4.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
EARTHQUAKE LOAD The loading due to earthquake is assessed based on the provisions of IS: 1893 (Part1):2002 Table-2 Zone factor (Z) Table-7 Response Reduction Factor (R) Table -1 Type of Soil Height of building (H)
= = = =
0.16 4.0 II 25.0m (max.)
Table Showing Seismic Zone , Importance Factor and Ductile detailing applications for individual building units -
Sr. No.
Building Detail
Seismic Zone
Importance Factor
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Auditorium Library istrative Block Academic unit MDP ( Academic) Sports complex Dispensary Entrance gate Community market Estate office Daycare Canteen MDP ( Residential) Students Hostel Married student hostel Staff Housing Faculty Housing Director’s Bungalow Hostel Mess Handicapped Housing
III III III III III III III III III III III III III III III III III III III III
1.50 1.50 1.50 1.50 1.50 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Ductile Detailing as per IS13920 Yes Yes Yes Yes Yes No No No No No No No No No No No No No No No
Fundamental Natural Period (T) is calculated for individual units as per base dimensions and height of structure with reference to IS: 1893-2002.
------------------------------------------------------------------------------------------------------------------------ - 5 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
AUDITORIUM BLOCK (SAMPLE CALCULATION) The loading due to earthquake is assessed based on the provisions of IS: 1893(Part1):2002 Seismic Zone
=
III
Table-2
Zone factor (Z)
=
0.16
Table-6
Importance Factor (I)
=
1.5
Table-7
Response Reduction Factor (R)
=
3.0
Table -1
Type of Soil
=
II
=
15.0m
Height of building (H) Base dimension of the building along Considered direction of lateral force (D)
L = B =
58.0 m 38.3 m
Fundamental Natural Time Period T
= 0.075 H 0.75 from CL -7.61 –IS 1893 (Part-1) 2002 = 0.075 x (15)0.75 = 0.571 sec
Sa/g = 2.381 from FIG-2 IS 1893 (Part-I) 2002 Ah
= =
=
Z . I . Sa 2 . R.g 0.16 x 1.5 x.2.381 2x3 0.0952
------------------------------------------------------------------------------------------------------------------------ - 6 -
PROJECT: INDIAN INSTITUTE OF MANAGEMENT
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
AT TIRUCHIRAPPALLI
5. BASIC LOADS AND LOAD COMBINATIONS The various loads are combined in accordance with the stipulations in IS:875 (Part 5)1987. Wherever imposed load is combined with earthquake load the appropriate part of the imposed load as specified in IS:1893-2002 is adopted both for evaluating earthquake effect and for combined load effects, used in such combination. Type Primary Primary Primary Primary Primary Primary Primary Primary Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination
Load Case 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
LOAD COMBINATIONS DEAD LOAD (DL) WALL LOAD (WL) SLAB DEAD LOAD (SDL) LIVE LOAD (LL) WIND LOAD X (+) WLX WIND LOAD Z (+) WLZ SIESMIC LOAD ALONG-X SLX SIESMIC LOAD ALONG-Z SLZ DL + WL + SDL + LL DL + WL + SDL + LL + WLX DL + WL + SDL + LL + WLZ DL + WL + SDL + LL - WLX DL + WL + SDL + LL - WLZ DL + WL + SDL + LL + SLX DL + WL + SDL + LL + SLZ DL + WL + SDL + LL - SLX DL + WL + SDL + LL - SLZ DL + WL + SDL + WLX DL + WL + SDL + WLZ DL + WL + SDL - WLX DL + WL + SDL - WLZ DL + WL + SDL + SLX DL + WL + SDL + SLZ DL + WL + SDL - SLX DL + WL + SDL - SLZ
6. LOAD FACTORS FOR DESIGN Description of Load Combination
Load Factor for Primary Load Cases Dead Load
Live Load
Wind Load
Dead load + Live load
1.5
1.5
0.0
Seismic Load 0.0
Dead load+ Wind load
1.5
0
1.5
0.0
Dead load+ Seismic load
1.5
0
0
1.5
Dead load+ Live load+Wind load
1.2
1.2
1.2
0.0
Dead load+ Live load + Seismic load
1.2
1.2
0
1.2
Dead load+ Wind load
0.9
0
1.5
0.0
Dead load+ Seismic load
0.9
0
0
1.5
------------------------------------------------------------------------------------------------------------------------ - 7 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
7
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
ANALYSIS METHOD The overall individual structure is analyzed for Static and Lateral loads due to Earthquake/Wind loads and its combinations. The analysis is conducted using standard software such as STAAD, Etabs and SAFE.
8.
DESIGN ASSUMPTIONS A) The design life of the structure is assumed as 50 years. This requirement is not applicable to replaceable materials. B) All R.C.C. structures will be designed according to the Limit State method as specified in IS: 456-2000. C) The R.C.C. structure is idealized as 3D space frame and analyzed using ETABS, software for both vertical and lateral loads. D) Forces and moments from the analysis output for the worst combinations are used for the design of the structure. E) Design of structural steel as per IS: 800-1984 F) Expansion t/strip to be provide at 45.0m (maximum) to control temperature effect. G) Following buildings analyzed and designed with consideration of 1 typical floor provision as per client’s request – 1) All Academic blocks, 2) Commercial complex, 3) Dispensary, 4) Faculty club, 5) Canteen, 6) Student Mess, 7) Estate Office.
------------------------------------------------------------------------------------------------------------------------ - 8 -
PROJECT: INDIAN INSTITUTE OF MANAGEMENT
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
9.
AT TIRUCHIRAPPALLI
CONSTRUCTION DETAILS 1) All units except Auditorium, sports complex etc. have RCC floor slab with RCC beam and slab system or flat slab system. 2) Auditorium, sports complex have m. s. sloping roof structure. 3) Library unit has few structural steel columns with infilled concrete for 15.0 m height. 4) Filling load
=
All filling in class room/seminar room considered as light weight material filling. (i.e. light weight cinder)
5) Grade of Concrete
=
M30 For foundation/column/beams/slabs etc. M40 For Post Tensioned beams M25 For Grade slab (Concrete design Mix as per IS 456-2000) M15 (For P.C.C. )
6) Aggregate
=
20mm and down size, mechanically crushed aggregate
7) Reinforcements
=
Grade Fe500 as per IS 1786. (To be tested before use)
8) Cement
=
Grade 43
9) Minimum column width – Single / two storey building
= 230mm
More than two storey building
= 300 mm
10 ) Minimum beam width =
230 mm
11) Masonry work
=
Aercon AAC Block. (100mm/200mm thk.)
12) Expansion t
=
Provide Expansion t for Acadamic unit, Unit, Type A, Type B, Married student hostel.
13) Temperature Analysis
=
Temperature analysis required for library unit. ( for 250C temperature difference)
14) Structural steel
=
All the structural steel shall before fabrication conform to IS:2062.( yield strength = 250 N/sq. m.)
14) Electrode
=
Covered electrode shall conform to IS 814 or IS 1395 as
appropriate. (Make of electrode to be
mention in tender document) 16) Welding
=
All welding connection as per IS 814,IS 1395,IS 819.
------------------------------------------------------------------------------------------------------------------------ - 9 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
10.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
DEFLECTION LIMITS The deflection limits under serviceability loads of a building or a building component should be as per related IS codes (i.e. for RCC structure IS 456-2000 and steel structure IS 800-2007).
11.
CRACK WIDTH CONSIDERATION (Reference - as per IS 456-2000 clause no. 35.3.2 ) Maximum surface crack width for all structures except water/liquid retaining structures Water retaining structures
12.
= 0.3mm. = 0.2 mm
MATERIAL The self-weight of the various elements are computed based on the built weight of materials as given below – (based on IS: 875 (part 1)-1987 and general construction practice) Materials Steel Plain Concrete Reinforced Concrete Soil Water Block Brick Light weight filling material (light weight cinder)
13.
Unit Weight in kN/m3 78.50 24 25 18 10 20 18 8
REINFORCEMENT COVER The minimum clear cover to main reinforcement shall be as follows (as per IS 456-2000.)Footings = bottom =75mm, sides = 75mm, Retaining wall = 40mm, Raft Slab = 40mm, Plinth beams = Bottom = 50mm, sides = 40mm Floor beams = Bottom/side = 40mm, Floor slabs = 25mm.
------------------------------------------------------------------------------------------------------------------------ - 10 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
14.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
FIRE RATING & EXPOSURE CONDITION Fire rating consideration – All external exposed structural should design with consideration of 2 hours Fire Rating and all internal design for 1.5 hours Fire Rating.
Exposure Condition – All external exposed structural should design with consideration of Moderate exposure and all internal design with Mild exposure condition.
15.
FOUNDATION SYSTEM Foundation system for all structures to be open isolated foundation with soil bearing capacities as follows (as per soil report dated 07.05.2014) – 3) SBC value 15 T/sq.m at 1.5m below NGL for Academic Block , Faculty housing, commercial complex, school , Estate office etc. 4) SBC value 30 T/sq.m at 2.5m below NGL for Auditorium, Block, library, Hostels, Mess hall, sports complex, non faculty apartments etc.
------------------------------------------------------------------------------------------------------------------------ - 11 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
16.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
CODES & STANDARDS All analysis and designs are conforming to the relevant Indian Standards. List of relevant Indian Standard codes refer for analysis & designCODE
DESCRIPTION
IS:875 (Part-1)-1987
Code of Practice for Design Loads (Other than Earthquake)for Building and Structures-Unit Weights of Buildings Materials and Stored Material.
IS:875 (Part-2)-1987
Code of Practice for Design Loads (Other than Earthquake) for Building and Structures-Imposed loads Code of Practice for Design Loads (Other than Earthquake) for Buildings and Structures –Wind Load.
IS:875 (Part-3)-1987 IS:875 (Part-5)-1987
Code of Practice for Design Loads (Other than Earthquake ) for Buildings and Structures - Special Loads and Load Combinations
IS:456 - 2000
Code of Practice for Plain and Reinforced Concrete
IS:2974 ( Part 1 to 5)
Code of practice for Design and Construction of Machine Foundation Code of Practice for General Construction in Steel
IS:800 -1984 & 2007 IS:1893 (Part-1)-2002 IS:432 (Part-1)-1982
IS:432 (Part-2)-1982
Indian Standard Criteria for Earthquake Resistant Design of Structures Specification of Mild Steel and Medium Tensile Steel bars and Hard drawn Steel Wire for concrete reinforcement –Mild Steel and Medium Tensile Steel Bars
IS:2062-1999
Specification of Mild Steel and Medium Tensile Steel bars and Hard drawn Steel Wire for concrete reinforcement –Hard drawn Steel Wire. Specification for High Strength Deformed Steel Bars and Wires for Concrete Reinforcement Indian Standard Code of practice for Design & Construction foundations in Soil: General Requirements. Indian Standard Code of practice for Fire Safety Of Buildings (General) : Details Of Construction. Specification of steel for General Structural Purposes
IS:3370 ( Part 1 to 4)
Code of Practice for Concrete Structures for storage of Liquids
SP:6
Handbook for Structural Engineering
IS:1786-1985 IS:1904 IS:1642-1989
------------------------------------------------------------------------------------------------------------------------ - 12 -
AT TIRUCHIRAPPALLI
DESIGN BASIS REPORT
C/7330/2014/R3
PROJECT
PROJECT: INDIAN INSTITUTE OF MANAGEMENT
Date: 8th May 2014
: INDIAN INSTITUTE OF MANAGEMENT CAMPUS AT TIRUCHIRAPPALLI.
CLIENT
: INDIAN INSTITUTE OF MANAGEMENT, TIRUCHIRAPPALLI NIT TRICHY CAMPUS (POST), THANJAVUR ROAD, TIRUCHIRAPPALLI - 620 015 ,
DESIGN ARCHITECT
: CHANDAVARKAR & THACKER CONSULTANTS PVT. LTD. ( C&T), 7, PALACE CROSS ROAD , BANGALORE – 560 020
1.
INTRODUCTION AND PROJECT DESCRIPTIONThe Indian Institute of Management, Tiruchirappalli is an educational campus. This project consists of following different unitsA) Academic Units – This unit consists of following different units – 1) 250 seater seminar room - Gr. Flr + Terrace 2) 120 seater class room - Gr. Flr + 1st +Terrace 3) 80 seater class room - Gr. Flr + 1st +Terrace 4) 50 seater class room - Gr. Flr + 1st +Terrace 5) Amphitheatre - Gr. Flr +Terrace 6) Faculty offices - Gr. Flr + 1st + 2nd +Terrace 7) Visitor/Faculty lounge - Gr. Flr + 1st + 2nd +Terrace 8) Multipurpose rooms etc. - Gr. Flr + 1st +Terrace 9) Connecting Corridor - Gr. Flr/1st Floor + Terrace 10) Arcade - Gr. Flr/1st Floor + Terrace
B) Residential Units – 1) 2) 3) 4) 5) 6) 7)
Students Hostel Married student hostel Staff Housing (Type A) Staff Housing (Type A) Faculty Housing Director’s Bungalow Handicapped Housing
- Gr. Flr + 1st to 3rd +Terrace - Stilt + 1st to 4th +Terrace - Gr. Flr.+ 1st to 3rd +Terrace - Gr. Flr.+ 1st to 3rd +Terrace - Gr. Flr + 1st +Terrace - Gr. Flr + 1st +Terrace - Gr. Flr +Terrace
------------------------------------------------------------------------------------------------------------------------ - 1 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
C) Other units – 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16)
Auditorium - Gr. Flr + 1st +Terrace Library - Basement + Gr. Flr + 1st to 3 rd +Terrace Sports complex - Gr. Flr + Terrace Dispensary - Gr. Flr + Terrace Entrance gate - Gr. Flr + Terrace Security Gate - Gr. Flr/1st Flr. + Terrace Community market - Gr. Flr +Terrace Estate office - Gr. Flr +1st+Terrace Daycare - Gr. Flr +Terrace Hostel Mess - Gr. Flr +Terrace Canteen - Gr. Flr +Terrace MDP ( Academic) - Gr. Flr + 1st +Terrace MDP ( Residential) - Gr. Flr + 1st to 3rd +Terrace . - Gr. Flr + 1st + 2nd + Terrace (with connecting bridge) Service units ( such as DG unit, Transformer, Water tanks, Sumps, Plant room etc.) Elevated water tank /Beacon-
Foundation system for all structures to be open isolated foundation with soil bearing capacities as follows (as per soil report dated 07.05.2014) – 1) SBC value 15 T/sq.m at 1.5m below NGL for Academic Block , Faculty housing, commercial complex, school , Estate office etc. 2) SBC value 30 T/sq.m at 2.5m below NGL for Auditorium, Block, library, Hostels, Mess hall, sports complex, non faculty apartments etc. 2.
DESIGN LOADS A) Super Imposed loads The imposed loads that are envisaged to act permanently (wherever applicable) are considered for analysis and design. These load values are based on IS: 875 (part-1)-1987 and general construction practice. Imposed load intensities –
Item Floor Finish ( 20mm thk tiles with 20mmthk cement mortar) Weathering Proof Course – 150mm thk brickbat coba with IPS finish False Ceiling with services Light weight partition on floor MEP Services External Glazing Toilet Sunk load ( consider 100 mm sunk) Solar load Roof sheeting Polycarbonate sheet/ skylight
Intensity in kN/m2 of plan area 1.00 3.00 1.00 1.00 0.25 2.00 2.00 2.00 0.15 0.15
------------------------------------------------------------------------------------------------------------------------ - 2 -
PROJECT: INDIAN INSTITUTE OF MANAGEMENT
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
AT TIRUCHIRAPPALLI
B) Live Loads The live load is assessed based on the occupancy classifications as per IS:875 (Part-2)1987 and are listed as below. Name of Structure
Occupancy Classification
UDL (KN/m2)
Academic Units
Class room & Lecture room
3.00
Academic Units
Seminar room room/ stage
5.00
Academic Units
Store room/ server room
5.00
Academic Units
Office, Reading room
4.00
Academic Units
Stairs, corridors, age
4.00
Academic Units Academic Units
/Auditorium/projector
Stack room/stack area (maximum height 2.2m) Stack room/stack area ( maximum height 3.2m)
6.00 8.00
Academic Units
Toilets & bath rooms
2.00
Academic Units
Sloping roof with slope less than 10 degree , access not provided except for maintenance
0.75
Academic Units
Flat Roof
1.50
Residential Units
All rooms and kitchens
2.00
Residential Units
Toilets & bath rooms
2.00
------------------------------------------------------------------------------------------------------------------------ - 3 -
PROJECT: INDIAN INSTITUTE OF MANAGEMENT
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
3.
AT TIRUCHIRAPPALLI
WIND LOADS The wind pressure has been calculated based on the data furnished below and other provisions laid in IS: 875 (Part 3)-1987 Basic Wind Speed
Vb
=
47 m/sec
Risk Coefficient
K1
=
1.04 (Probable Design life of structure is assumed as 75 years)
Terrain Category
=
3
Structure Class
=
Class B / C …. as per individual unit
Factor
K2
=
0.82 to 1.00 ….. as per individual unit
Topography factor
K3
=
1.0
Design Wind Speed and wind pressure can be calculated for individual units as per base dimensions and height of structure with reference to IS: 875 (part 3)-1987. AUDITORIUM BLOCK (SAMPLE CALCULATION) For Preliminary analysis/design, the wind pressure has been calculated based on the data furnished below and other provisions laid in IS: 875 (Part 3)-1987 Base dimension of the building along - L = 58m ; B = 38.3m Height of building (H) = 15.0m Basic Wind Speed Vb = 47 m/sec Risk Coefficient Terrain Category Structure Class Factor Topography factor
K1 K2 K3
= = = = =
1.04 3 Class C 0.87 1.0
DESIGN WIND SPEED (Vz) Vz = Vb .k1.k2.k3 = 47 x 1.04 x 0.87 x 1 = 42.52 m/s DESIGN WIND PRESSURE Pz = 0.6 x Vz2 = 0.6 x 42.52 x 42.52 = 1084.77 N/sq. m Force Co-efficient calculationForce Co-efficient (Cf) in X – direction Force Co-efficient (Cf) in Y – direction
= =
1.20 1.10
Considered Cf = 1.30 for ETAB analysis for both direction. ------------------------------------------------------------------------------------------------------------------------ - 4 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
4.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
EARTHQUAKE LOAD The loading due to earthquake is assessed based on the provisions of IS: 1893 (Part1):2002 Table-2 Zone factor (Z) Table-7 Response Reduction Factor (R) Table -1 Type of Soil Height of building (H)
= = = =
0.16 4.0 II 25.0m (max.)
Table Showing Seismic Zone , Importance Factor and Ductile detailing applications for individual building units -
Sr. No.
Building Detail
Seismic Zone
Importance Factor
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Auditorium Library istrative Block Academic unit MDP ( Academic) Sports complex Dispensary Entrance gate Community market Estate office Daycare Canteen MDP ( Residential) Students Hostel Married student hostel Staff Housing Faculty Housing Director’s Bungalow Hostel Mess Handicapped Housing
III III III III III III III III III III III III III III III III III III III III
1.50 1.50 1.50 1.50 1.50 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Ductile Detailing as per IS13920 Yes Yes Yes Yes Yes No No No No No No No No No No No No No No No
Fundamental Natural Period (T) is calculated for individual units as per base dimensions and height of structure with reference to IS: 1893-2002.
------------------------------------------------------------------------------------------------------------------------ - 5 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
AUDITORIUM BLOCK (SAMPLE CALCULATION) The loading due to earthquake is assessed based on the provisions of IS: 1893(Part1):2002 Seismic Zone
=
III
Table-2
Zone factor (Z)
=
0.16
Table-6
Importance Factor (I)
=
1.5
Table-7
Response Reduction Factor (R)
=
3.0
Table -1
Type of Soil
=
II
=
15.0m
Height of building (H) Base dimension of the building along Considered direction of lateral force (D)
L = B =
58.0 m 38.3 m
Fundamental Natural Time Period T
= 0.075 H 0.75 from CL -7.61 –IS 1893 (Part-1) 2002 = 0.075 x (15)0.75 = 0.571 sec
Sa/g = 2.381 from FIG-2 IS 1893 (Part-I) 2002 Ah
= =
=
Z . I . Sa 2 . R.g 0.16 x 1.5 x.2.381 2x3 0.0952
------------------------------------------------------------------------------------------------------------------------ - 6 -
PROJECT: INDIAN INSTITUTE OF MANAGEMENT
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
AT TIRUCHIRAPPALLI
5. BASIC LOADS AND LOAD COMBINATIONS The various loads are combined in accordance with the stipulations in IS:875 (Part 5)1987. Wherever imposed load is combined with earthquake load the appropriate part of the imposed load as specified in IS:1893-2002 is adopted both for evaluating earthquake effect and for combined load effects, used in such combination. Type Primary Primary Primary Primary Primary Primary Primary Primary Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination Combination
Load Case 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
LOAD COMBINATIONS DEAD LOAD (DL) WALL LOAD (WL) SLAB DEAD LOAD (SDL) LIVE LOAD (LL) WIND LOAD X (+) WLX WIND LOAD Z (+) WLZ SIESMIC LOAD ALONG-X SLX SIESMIC LOAD ALONG-Z SLZ DL + WL + SDL + LL DL + WL + SDL + LL + WLX DL + WL + SDL + LL + WLZ DL + WL + SDL + LL - WLX DL + WL + SDL + LL - WLZ DL + WL + SDL + LL + SLX DL + WL + SDL + LL + SLZ DL + WL + SDL + LL - SLX DL + WL + SDL + LL - SLZ DL + WL + SDL + WLX DL + WL + SDL + WLZ DL + WL + SDL - WLX DL + WL + SDL - WLZ DL + WL + SDL + SLX DL + WL + SDL + SLZ DL + WL + SDL - SLX DL + WL + SDL - SLZ
6. LOAD FACTORS FOR DESIGN Description of Load Combination
Load Factor for Primary Load Cases Dead Load
Live Load
Wind Load
Dead load + Live load
1.5
1.5
0.0
Seismic Load 0.0
Dead load+ Wind load
1.5
0
1.5
0.0
Dead load+ Seismic load
1.5
0
0
1.5
Dead load+ Live load+Wind load
1.2
1.2
1.2
0.0
Dead load+ Live load + Seismic load
1.2
1.2
0
1.2
Dead load+ Wind load
0.9
0
1.5
0.0
Dead load+ Seismic load
0.9
0
0
1.5
------------------------------------------------------------------------------------------------------------------------ - 7 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
7
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
ANALYSIS METHOD The overall individual structure is analyzed for Static and Lateral loads due to Earthquake/Wind loads and its combinations. The analysis is conducted using standard software such as STAAD, Etabs and SAFE.
8.
DESIGN ASSUMPTIONS A) The design life of the structure is assumed as 50 years. This requirement is not applicable to replaceable materials. B) All R.C.C. structures will be designed according to the Limit State method as specified in IS: 456-2000. C) The R.C.C. structure is idealized as 3D space frame and analyzed using ETABS, software for both vertical and lateral loads. D) Forces and moments from the analysis output for the worst combinations are used for the design of the structure. E) Design of structural steel as per IS: 800-1984 F) Expansion t/strip to be provide at 45.0m (maximum) to control temperature effect. G) Following buildings analyzed and designed with consideration of 1 typical floor provision as per client’s request – 1) All Academic blocks, 2) Commercial complex, 3) Dispensary, 4) Faculty club, 5) Canteen, 6) Student Mess, 7) Estate Office.
------------------------------------------------------------------------------------------------------------------------ - 8 -
PROJECT: INDIAN INSTITUTE OF MANAGEMENT
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
9.
AT TIRUCHIRAPPALLI
CONSTRUCTION DETAILS 1) All units except Auditorium, sports complex etc. have RCC floor slab with RCC beam and slab system or flat slab system. 2) Auditorium, sports complex have m. s. sloping roof structure. 3) Library unit has few structural steel columns with infilled concrete for 15.0 m height. 4) Filling load
=
All filling in class room/seminar room considered as light weight material filling. (i.e. light weight cinder)
5) Grade of Concrete
=
M30 For foundation/column/beams/slabs etc. M40 For Post Tensioned beams M25 For Grade slab (Concrete design Mix as per IS 456-2000) M15 (For P.C.C. )
6) Aggregate
=
20mm and down size, mechanically crushed aggregate
7) Reinforcements
=
Grade Fe500 as per IS 1786. (To be tested before use)
8) Cement
=
Grade 43
9) Minimum column width – Single / two storey building
= 230mm
More than two storey building
= 300 mm
10 ) Minimum beam width =
230 mm
11) Masonry work
=
Aercon AAC Block. (100mm/200mm thk.)
12) Expansion t
=
Provide Expansion t for Acadamic unit, Unit, Type A, Type B, Married student hostel.
13) Temperature Analysis
=
Temperature analysis required for library unit. ( for 250C temperature difference)
14) Structural steel
=
All the structural steel shall before fabrication conform to IS:2062.( yield strength = 250 N/sq. m.)
14) Electrode
=
Covered electrode shall conform to IS 814 or IS 1395 as
appropriate. (Make of electrode to be
mention in tender document) 16) Welding
=
All welding connection as per IS 814,IS 1395,IS 819.
------------------------------------------------------------------------------------------------------------------------ - 9 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
10.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
DEFLECTION LIMITS The deflection limits under serviceability loads of a building or a building component should be as per related IS codes (i.e. for RCC structure IS 456-2000 and steel structure IS 800-2007).
11.
CRACK WIDTH CONSIDERATION (Reference - as per IS 456-2000 clause no. 35.3.2 ) Maximum surface crack width for all structures except water/liquid retaining structures Water retaining structures
12.
= 0.3mm. = 0.2 mm
MATERIAL The self-weight of the various elements are computed based on the built weight of materials as given below – (based on IS: 875 (part 1)-1987 and general construction practice) Materials Steel Plain Concrete Reinforced Concrete Soil Water Block Brick Light weight filling material (light weight cinder)
13.
Unit Weight in kN/m3 78.50 24 25 18 10 20 18 8
REINFORCEMENT COVER The minimum clear cover to main reinforcement shall be as follows (as per IS 456-2000.)Footings = bottom =75mm, sides = 75mm, Retaining wall = 40mm, Raft Slab = 40mm, Plinth beams = Bottom = 50mm, sides = 40mm Floor beams = Bottom/side = 40mm, Floor slabs = 25mm.
------------------------------------------------------------------------------------------------------------------------ - 10 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
14.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
FIRE RATING & EXPOSURE CONDITION Fire rating consideration – All external exposed structural should design with consideration of 2 hours Fire Rating and all internal design for 1.5 hours Fire Rating.
Exposure Condition – All external exposed structural should design with consideration of Moderate exposure and all internal design with Mild exposure condition.
15.
FOUNDATION SYSTEM Foundation system for all structures to be open isolated foundation with soil bearing capacities as follows (as per soil report dated 07.05.2014) – 3) SBC value 15 T/sq.m at 1.5m below NGL for Academic Block , Faculty housing, commercial complex, school , Estate office etc. 4) SBC value 30 T/sq.m at 2.5m below NGL for Auditorium, Block, library, Hostels, Mess hall, sports complex, non faculty apartments etc.
------------------------------------------------------------------------------------------------------------------------ - 11 -
MAHIMTURA CONSULTANTS PVT. LTD. , 3rd floor , Unique House, S.A. Brelvi Road, Fort, Mumbai -01.
16.
PROJECT: INDIAN INSTITUTE OF MANAGEMENT AT TIRUCHIRAPPALLI
CODES & STANDARDS All analysis and designs are conforming to the relevant Indian Standards. List of relevant Indian Standard codes refer for analysis & designCODE
DESCRIPTION
IS:875 (Part-1)-1987
Code of Practice for Design Loads (Other than Earthquake)for Building and Structures-Unit Weights of Buildings Materials and Stored Material.
IS:875 (Part-2)-1987
Code of Practice for Design Loads (Other than Earthquake) for Building and Structures-Imposed loads Code of Practice for Design Loads (Other than Earthquake) for Buildings and Structures –Wind Load.
IS:875 (Part-3)-1987 IS:875 (Part-5)-1987
Code of Practice for Design Loads (Other than Earthquake ) for Buildings and Structures - Special Loads and Load Combinations
IS:456 - 2000
Code of Practice for Plain and Reinforced Concrete
IS:2974 ( Part 1 to 5)
Code of practice for Design and Construction of Machine Foundation Code of Practice for General Construction in Steel
IS:800 -1984 & 2007 IS:1893 (Part-1)-2002 IS:432 (Part-1)-1982
IS:432 (Part-2)-1982
Indian Standard Criteria for Earthquake Resistant Design of Structures Specification of Mild Steel and Medium Tensile Steel bars and Hard drawn Steel Wire for concrete reinforcement –Mild Steel and Medium Tensile Steel Bars
IS:2062-1999
Specification of Mild Steel and Medium Tensile Steel bars and Hard drawn Steel Wire for concrete reinforcement –Hard drawn Steel Wire. Specification for High Strength Deformed Steel Bars and Wires for Concrete Reinforcement Indian Standard Code of practice for Design & Construction foundations in Soil: General Requirements. Indian Standard Code of practice for Fire Safety Of Buildings (General) : Details Of Construction. Specification of steel for General Structural Purposes
IS:3370 ( Part 1 to 4)
Code of Practice for Concrete Structures for storage of Liquids
SP:6
Handbook for Structural Engineering
IS:1786-1985 IS:1904 IS:1642-1989
------------------------------------------------------------------------------------------------------------------------ - 12 -
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