SEISMIC DESIGN SEISMIC DESIGN

OFOF

RADISSON HOTELRADISSON HOTEL

NEW DELHINEW DELHI

BYBY VINAY GUPTA

CEOTCPL DELHITCPL, DELHI

GENERAL VIEW

AREA USAGEAREA USAGE

• LOWER BASEMENT: PARKING, DG, CHILLER PUMPS & OTHER SERVICES

• UPPER BASEMENT: PARKING, LAUNDARY, KITCHEN, BOWLING ALLEY, SPA, SQUASH, ETC

• GROUND FLOOR: LOBBY, BANQUET, RESTAURANTS, ETC

• MEZZANINE: SERVICES TRANSFER, TRANSFER GIRDERS, ETC

• UPPER FOUR FLOORS: GUEST ROOMS

CONSTRAINTS

HEIGHT DUE TO AVIATION RESTRICTIONS• HEIGHT DUE TO AVIATION RESTRICTIONS

COST & TIME• COST & TIME

• BASEMENT LARGER THAN UPPER FLOORS• BASEMENT LARGER THAN UPPER FLOORS

BLOCK‐IBLOCK‐IIBLOCK‐IIICOMMERCIAL BLOCK

MOVEMENT GAP

50m 50m

GAP

‐ Temp: 12x10‐6  x (±) 25°cx50m = ± 15mm  20m

Buildingblock

Buildingblock

Sh i k 2 5 10 4 50 12 5‐ Shrinkage: 2.5x10‐4  x 50m = ‐12.5mm(14 days decentering) 

‐ Seismic: ± 15mm (out of phase)

‐ Total: ± 15 – 12.5 ± 15 = ‐42.5mm;+17.5mm

EXPANSION JOINTS

EXPANSION JOINTS

STRUCTURAL SIMPLICITY EN 1998‐1:2004

STRUCTURAL SIMPLICITY INCORPORATING CLEAR AND

EN 1998‐1:2004

STRUCTURAL SIMPLICITY INCORPORATING CLEAR AND DIRECT PATHS FOR TRANSIMISSION OF SEISMIC FORCES IS ANIMPORTANT ASPECT AS SIMPLE STRUCTURES ARE SUBJECT TOIMPORTANT ASPECT AS SIMPLE STRUCTURES ARE SUBJECT TO 

MUCH LESS UNCERTAINTY OF SEISMIC BEHAVIOUR 

Ha! Ha!!

HABITAT 67HABITAT 67

DUCTILITY : IS : 13920 (ZONES III, IV & V)DUCTILITY : IS : 13920 (ZONES III, IV & V)FLEXURAL MEMBERS: Pfactored ≤ 0.1 fck)

• +ve BM Steel ≥ 0.5 of –ve BM Steel

• Development length + 10xd

• Hoops over spliced bar length

N li i 2d & ¼ b l h• No splicing upto 2d & ¼ member length

M i f i l fi t i f d• Max spacing of special confinement reinforced

: 8 x dia of smallest longitudinal bar: 8 x dia of smallest longitudinal bar: d/4 : 100mm: 100mm• provided over 2 x depth

COMPRESSION MEMBERS (Pfactored > 0.1 fck)

• Stirrup spacing of parallel legs ≤ 300mm or cross tie

• Extent = larger of:i. Least Lateral Dimensioni. Least Lateral Dimensionii. Column clear height/6iii. 450mm

• Hoop spacing = ¼ smaller dimensionp p gbut ≤ 100mm and ≥ 75mm

DESIGN FOR IRREGULARITIESDESIGN FOR IRREGULARITIES

V ti l/H i t l i l it S ti J i t• Vertical/Horizontal irregularity = Separation Joint

• Soft storey (Stiffness ≤ 80% of avg of 3 floors above)• Soft storey (Stiffness ≤ 80% of avg of 3 floors above)i. Increase ‘I’ value of soft storey orii Design Columns & Beams for 2 5 times EQ forceii. Design Columns & Beams for 2.5 times EQ force 

oriii Shear walls at farthest symmetrical location;iii. Shear walls at farthest symmetrical location; 

1.5  times the EQ force  

•

Connection of Brick Wall with RCC Members

CONSTRUCTIONCONSTRUCTION

PHOTOGRAPHSPHOTOGRAPHS

CONSTRUCTIONCONSTRUCTION

PHOTOGRAPHSPHOTOGRAPHS

VINAY GUPTACHIEF EXECUTIVE OFFICERCHIEF EXECUTIVE OFFICER

TANDON CONSULTANTS PVT LTDNEW DELHI