Determine the UBC-97 design seismic forces for a nine-story special moment resisting steel frame office building located in NCR on very dense soil and soft rock. The building is located 5 km from a fault capable of large earthquakes with a moderate slip rate (M>7, SR>2mm/yr). The story heights are all four meters. The plan area is 30 meters by 50 meters. The total dead load is 5 kN per square meter at all levels. The moment frames consist of two four-bay frames in the transverse direction and two seven-bay frames in the longitudinal direction. Use NSCP provision.
Determine the UBC-97 design seismic forces for a nine-story special moment resisting steel frame office building located in NCR on very dense soil and soft rock. The building is located 5 km from a fault capable of large earthquakes with a moderate slip rate (M>7, SR>2mm/yr). The story heights are all four meters. The plan area is 30 meters by 50 meters. The total dead load is 5 kN per square meter at all levels. The moment frames consist of two four-bay frames in the transverse direction and two seven-bay frames in the longitudinal direction. Use NSCP provision.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Determine the UBC-97 design seismic forces for a nine-story special
moment resisting steel frame office building located in NCR on very
dense soil and soft rock. The building is located 5 km from a fault
capable of large earthquakes with a moderate slip rate (M>7,
SR>2mm/yr). The story heights are all four meters. The plan area is 30
meters by 50 meters. The total dead load is 5 kN per square meter at all
levels. The moment frames consist of two four-bay frames in the
transverse direction and two seven-bay frames in the longitudinal
direction. Use NSCP provision.
I = 1.0
R = 8.5 (SMRF)
Seismic Zone 4
Z = .4
Soil Profile Type Sc
Seismic Source Type B
N₁ = 1.2
Cy=.56 Ny=.56 (1.2) = .67
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