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. What is the overturning moment at the base? 1200 F800 k F-400 k Roof 3rd Flr 2nd Fir
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. What is the overturning moment at the base? 1200 F800 k F-400 k Roof 3rd Flr 2nd Fir
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:What is the overturning moment at the base?
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
F800 k
F-400 k
Story Elevation
(ft)
Weight
(kip)
3,000 k
4,000 k
4,000 k
11,000k
42
30
Building Elevation and Seismic Story Forces
15
14,400 kip-ft
24,400 kip-ft
60,400 kip-ft
80,400 kip-ft
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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