CASE STUDY: 40 STORY BRBF BUILDING LOS ANGELES - PEER

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Wind Design• ASCE 7-05 Method 2• Application ofhorizontal X and Ypressures in combinationwith torsion• Gust factor (G f ) computedusing 6.5.8.2 for dynamicallysensitive structures with 1%damping8
Wind DesignParameterBasic Wind Speed, 3 sec. gust (V)Basic Wind Speed, 3 sec gust (V), for serviceability winddemands based on a 10 year mean recurrence intervalValue85 mph67 mphExposureOccupancy CategoryImportance Factor (I w ) 1.0Topographic Factor (K zt ) 1.0Exposure Classification• Wind loads were statically applied in ETABS andbrace forces computedBIIEnclosedInternal Pressure Coefficient (GC pi ) ± 0.18Mean Roof Height (h) 544’-6”Wind Base Shear along Two Orthogonal Directions1436 kips and 2629 kips9
Page 1 and 2: INVESTIGATEDESIGNREHABILITATECASE S
Page 3 and 4: Building Description• Approximate
Page 5 and 6: Code Design - Contd.• Height limi
Page 7: Gravity LoadingDescription/Location
Page 11 and 12: Design Spectrum11
Page 13 and 14: Member Design• Member design perf
Page 15 and 16: Member Design• Accommodation of t
Page 17 and 18: LATBC-Performance Based Design• W
Page 19 and 20: LATBC Design - Findings• Member s
Page 21 and 22: LATBC Design - MCE Acceptance Crite
Page 23 and 24: PEER TBI- Performance “+”• Wi
Page 25 and 26: PEER TBI Design - MCE Story Drifts2
Page 27: Summary & Conclusions• Performanc

CASE STUDY: 40 STORY BRBF BUILDING LOS ANGELES - PEER

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