12.6 Evaluate and compare seismic design requirements and base shear force for several buildings in different cities across the United States. Seismic Acceleration Parameters for each site is given on the map below. The buildings' general description, dimensions and weight is shown on the next page table. For each case determine the following: a) Total seismic weight of the building b) Building vibration period using Equation 1 on the previous page; c) Response modification Factor from ASCE Table 12.2-1 d) Seismic base shear using the equations below Seismic Base Shear In accordance ASCE-7 code, buildings must be designed to withstand lateral forces that are generated during a severe earthquake. The minimum required design force is given by a series of equations as shown below. Equivalent Base Shear, Seismic response coefficient, In these equations: V= C, W Spil Cs TR C₂ < SD31 R Sp₁ & Sps are Seismic Acceleration Parameters that depend on building site and soil type, I is Importance Factor that depends on the building use and function, R is Response Modification Factor that depends on the building framing system, and W is the Effective Seismic Weight of the building. Redmond, WA Sds=0.84 g Sd1=0.42 g San Francisco, CA Sds=1.34 g Sd1=0.65 g Santa Monica, CA Sds=1.34 g Sd1=0.75 g New York, NY Sds 0.186 g Sd1=0.048 g Oa Highest hazard Lowest hazard Las Vegas, NV Sds=0.37 g Sd1=0.17 g Miami Beach, FL Sds=0.044 g Sd1=0.033 g US Seismicity Map and Sample Seismic Acceleration Parameters Case Location Building description height/size Seismic Force- Total seismic Vibration Resisting Systems weight, W (Kip) Period, T (sec) Response Modification Base Shear, V (kip) Factor, R A UCSF Campus, 10-story R/C residential Dual system with San Francisco, B C CA Downtown Santa Monica, CA Miami Beach, Miami, FL 'D 5th Ave E New York, NY University of Nevada Campus Las Vegas, NV F Microsoft Campus Redmond, WA building; 110 ft tall; 22,500 sq. special R/C moment ft per floor; 125 psf average floor weight 4-story wood-frame residential over one-story R/C parking podium, 62 ft tall; 17,500 sq. ft per floor 35 psf average 4 wood levels wood frame plus 175 psf 2nd floor concrete 20-story R/C hotel building. 200 ft tall; 12,500 sq. ft per floor; 110 psf average floor weight 40-story steel frame, office/retail/residential building, 480 ft tall; 5,600 sq. ft per floor 75 psf average floor weight 8-story R/C office/laboratory/classroom building, 120 ft tall; 20,000 sq. ft per floor 150 psf average floor weight 12-story steel-frame office building, 150 ft tall; 6,400 sq. ft per floor 85 psf average floor weight resisting frame and special R/C shear walls Bearing wall system with Light-frame (wood) walls sheathed with wood structural panels Bearing wall system with Intermediate R/C shear walls Building frame system with Ordinary R/C shear walls Building frame system with Special R/C shear walls Building frame system with steel eccentrically braced frames

12.6 Evaluate and compare seismic design requirements and base shear force for several buildings in different cities across the United States. Seismic Acceleration Parameters for each site is given on the map below. The buildings' general description, dimensions and weight is shown on the next page table. For each case determine the following: a) Total seismic weight of the building b) Building vibration period using Equation 1 on the previous page; c) Response modification Factor from ASCE Table 12.2-1 d) Seismic base shear using the equations below Seismic Base Shear In accordance ASCE-7 code, buildings must be designed to withstand lateral forces that are generated during a severe earthquake. The minimum required design force is given by a series of equations as shown below. Equivalent Base Shear, Seismic response coefficient, In these equations: V= C, W Spil Cs TR C₂ < SD31 R Sp₁ & Sps are Seismic Acceleration Parameters that depend on building site and soil type, I is Importance Factor that depends on the building use and function, R is Response Modification Factor that depends on the building framing system, and W is the Effective Seismic Weight of the building. Redmond, WA Sds=0.84 g Sd1=0.42 g San Francisco, CA Sds=1.34 g Sd1=0.65 g Santa Monica, CA Sds=1.34 g Sd1=0.75 g New York, NY Sds 0.186 g Sd1=0.048 g Oa Highest hazard Lowest hazard Las Vegas, NV Sds=0.37 g Sd1=0.17 g Miami Beach, FL Sds=0.044 g Sd1=0.033 g US Seismicity Map and Sample Seismic Acceleration Parameters Case Location Building description height/size Seismic Force- Total seismic Vibration Resisting Systems weight, W (Kip) Period, T (sec) Response Modification Base Shear, V (kip) Factor, R A UCSF Campus, 10-story R/C residential Dual system with San Francisco, B C CA Downtown Santa Monica, CA Miami Beach, Miami, FL 'D 5th Ave E New York, NY University of Nevada Campus Las Vegas, NV F Microsoft Campus Redmond, WA building; 110 ft tall; 22,500 sq. special R/C moment ft per floor; 125 psf average floor weight 4-story wood-frame residential over one-story R/C parking podium, 62 ft tall; 17,500 sq. ft per floor 35 psf average 4 wood levels wood frame plus 175 psf 2nd floor concrete 20-story R/C hotel building. 200 ft tall; 12,500 sq. ft per floor; 110 psf average floor weight 40-story steel frame, office/retail/residential building, 480 ft tall; 5,600 sq. ft per floor 75 psf average floor weight 8-story R/C office/laboratory/classroom building, 120 ft tall; 20,000 sq. ft per floor 150 psf average floor weight 12-story steel-frame office building, 150 ft tall; 6,400 sq. ft per floor 85 psf average floor weight resisting frame and special R/C shear walls Bearing wall system with Light-frame (wood) walls sheathed with wood structural panels Bearing wall system with Intermediate R/C shear walls Building frame system with Ordinary R/C shear walls Building frame system with Special R/C shear walls Building frame system with steel eccentrically braced frames