What is the seismic base shear coefficient, Cs for this building?LevelRoof3rdThe following shows a schematic section of a three-storyreinforced concrete building. The building weights,elevations and seismic story forces are shown in the tablebelow.2Fre=1200 kFar 800 kFad-400 kStoryWeight(kip)3,000 k4,000 k4,000 k11,000k0.220.240.260.28Elevation(ft)4230Building Elevation and Seismic Story Forces15Storyforce, F(kip)1,2008004002,400KStory shear(kip)1,2002,0002,400Roof3rd Flr2nd FirStory overturningmoment(kip-ft)14,40044.40080,400

To determine- Base shear coefficient of the building

Answered: The following shows a schematic section…

The following shows a schematic section of a three-story reinforced concrete building. The building weights, elevations and seismic story forces are shown in the table below.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

What is the seismic base shear coefficient, Cs for this building?
Level
Roof
3rd
The following shows a schematic section of a three-story
reinforced concrete building. The building weights,
elevations and seismic story forces are shown in the table
below.
2
Fre=1200 k
Far 800 k
Fad-400 k
Story
Weight
(kip)
3,000 k
4,000 k
4,000 k
11,000k
0.22
0.24
0.26
0.28
Elevation
(ft)
42
30
Building Elevation and Seismic Story Forces
15
Story
force, F
(kip)
1,200
800
400
2,400K
Story shear
(kip)
1,200
2,000
2,400
Roof
3rd Flr
2nd Fir
Story overturning
moment
(kip-ft)
14,400
44.400
80,400

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