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SEISMIC FORCES per ASCE 7-16 <br />Seismic Parameters for MCER ground motions <br />SS=S1= <br />Design Spectrum <br />Site Class = <br />Fa =IBC Table 1613.2.3(1) <br />Fv =IBC Table 1613.2.3(2) <br />SMS ==FaSS <br />SM1 ==FvS1 <br />SDS ==(2/3)SMS <br />SD1 ==(2/3)SM1 <br />SD1(mod) ==1.5 x SD1 150% amplification for T>1.5Ts applies for ELF & MRSA Procedure <br />T0 ==0.2(SD1/SDS) <br />TS ==(SD1/SDS) <br />TL =Long period Transition <br />Seismic Design Category (SDC) <br />Risk Category = <br />Seismic Importance Factor, Ie = <br />Design Category (based on SDS) =IBC Table 1613.2.5(1) <br />Design Category (based on SD1) =IBC Table 1613.2.5(2) <br />Design Category (governing) = Worst Case <br />(R/I)xCs = Unreduced N/S base shear <br />(R/I)xCs =Unreduced E/W base shear <br />Project : <br />8.0sec <br />0.73sec <br />0.15sec <br />0.792g <br />1.090g <br />1.188g <br />If Site Class D is selected as a Default (ie no site classification <br />by Geotechnical Engineer), then Fa shall not be less than 1.2 <br />[Ref CBC/IBC s1613.2.3]. <br />Per s11.4.8: Exception 2: For S1 > 0.2, the Design Basis <br />Earthquake spectrum is amplified by up to 1.5 x eq. 11.4-6 & <br />11.4-7 for T > 1.5Ts, or = Sds for Ts > T > 1.5Ts. <br />D <br />1.76g <br />1.84 <br />1.00 <br />1.188g <br />II <br />D <br />D <br />1.00 <br />D <br />1.288g 0.460g <br /> No: <br />CHP/JS <br />5/17/23 <br />23005.00 <br />Page:Date: <br />By: <br />Cypress Fire Station <br />1.09g <br />1.09g <br />0.0g <br />0.2g <br />0.4g <br />0.6g <br />0.8g <br />1.0g <br />1.2g <br />1.4g <br />1.6g <br />0.0sec 0.5sec 1.0sec 1.5sec 2.0sec 2.5sec 3.0sec 3.5sec 4.0sec <br />Sp <br />e <br />c <br />t <br />r <br />a <br />l <br /> <br />A <br />c <br />c <br />e <br />l <br />e <br />r <br />a <br />t <br />i <br />o <br />n <br />, <br /> <br />S <br />a <br />Period, T <br />Elastic (Unreduced) Design Response Spectrum <br />(including effect of s11.4.8 Exception 2, where applicable) <br />Sa <br />To <br />Ts <br />Sa, N/S <br />Sa, E/W <br />Printed on: 5/14/2024 at 3:02 PM 23005.10_Project Calculations_2021 IBC1.xlsx <br />15 <br />PER GEOTECHNICAL <br />REPORT