Laserfiche WebLink
Able Energy <br /> Robb Residence <br /> Ref ASCE 7-10 & 2012 IBC <br /> Equivalent Laterai Procedure <br /> Computatwn of Seismic Base Shear V=CsW ONLY ARRAY 1 <br /> Effective Seismic Weight Per Sec 12.7.2 W= 54900 Lbf <br /> Computation of Seismic response coeffident Cs=Sds!(R/1) <br /> Spectral response acceleration,short period range Per Sec 11.4.4&12.14.8.1 Sds= 0.058 g's <br /> Response Modification Factor R per Table 12.2-1 R= 6 <br /> Occupancy Importancz Factor I per Section C11.1 1= 1.25 <br /> Seismic Response Coe�cient Cs Cs= 0.012 <br /> COMPUTE PERIOD T FOR THE BUILDING <br /> Fundamental Period of a Structure T per section 12.8-2 Te 0.02 Sec T,=C�h"„ _.02h 75 <br /> Height of the building in feet h= 18.00 Ft <br /> VeRical Distribution of Seismic Loads Section 19.2.2 <br /> K= 1.00 <br /> Altemate method if structure has less than 10 stories(1 story=10ft) <br /> Number of Stories N= 2.00 <br /> Period per equation 12.8-8,for masonry or steel moment resisting structures T= 0.20 Sec <br /> USE FOR PERIOD T the largest T= 0.20 Sec <br /> Selection of Period Parameters,Cv and X from table 12.&2 Type 4 All other structural systems <br /> Period parameter Cv Cv= 0.02 rawe�z.s-2 <br /> Period Parameter x x= 0.075 Table 12.&2 <br /> Computation of Long Period transition period TL per figure 22-12 0.012124667 <br /> Using Figure 22-12 of the ASCE 7-10 we get: TL= 4 sec IF <br /> Compare T vs TL and decide what condition applies <br /> Maximum �f T,<=TL Than Use this eqaution <br /> Spectral response acceleration,at 1 sec Per Sec 11.4.4 Spi= 0.061 sec <br /> Cs not to exceed IF <br /> Maximum Seismic Response Coefficient Cs=Sd1/(�(R/I) Cs= 0.064 <br /> If T,>TL Then Do not use this equations <br /> Minimum Cs not to exceed Do not use this equations <br /> Seismic Response Coefficient Cs=Sp�T�!((T x�(R/I)) Cs= 1.271 <br /> Compare Cs and it cannot be less than IF <br /> Minimum value of Cs Cs= 0.01 <br /> Minimum If S1 >.6g then,Cs ShaN not be less than Do Not use this equations <br /> Mapped MCE,response acceleration parameter at period 1 sec Zip S1= 0.04 g's <br /> Minimum value of Cs,given S1 is greater than.6g Cs= 0.004 Not used <br /> Select the proper value for Cs Ts= 1.05 TS=SDI�SDS <br /> Seismic Response Coefficient Cs Cs= 0.012 <br /> Seismic Base Shear V= 665.6442 Lbf <br /> P2 0.0 Lbf <br /> P1 665.6 Lbf Roof <br /> Sheet 8 <br />