411 & 413 E 20th St - Plan - Laserfiche WebLink

Home Browse Search

ASCE 7-16 Seismic Base Shear LIC# : KW-06019339, Build:20.25.06.16 SPS Engineering (c) ENERCALC, LLC 1982-2025 DESCRIPTION:Seismic Base Shear Analysis Project File: 20th st.ec6 " Cs " Response Coefficient ASCE 7-16 Section 12.8.1.1 S : Short Period Design Spectral ResponseDS =1.0511.051 From Eq. 12.8-2, Preliminary Cs =0.154 Upper limit on SDS =1.000 SDS used for CS calc =1.000 " R " : Response Modification Factor =6.500 From Eq. 12.8-3 & 12.8-4 , Cs need not exceed 0.577= " I " : Seismic Importance Factor =1 From Eq. 12.8-5 & 12.8-6, Cs not be less than =0.044 =Cs : Seismic Response Coefficient 0.1538User has selected ASCE 12.8.1.3 : Regular structure, Less than 5 Stories and with T <<= 0.5 sec, SO Ss <= 1.5 for Cs calculation Seismic Base Shear ASCE 7-16 Section 12.8.1 W ( see Sum Wi below ) =0.00 kCs =0.1538 from 12.8.1.1 Seismic Base Shear V = Cs * W =0.00 k Vertical Distribution of Seismic Forces ASCE 7-16 Section 12.8.3 " k " : hx exponent based on Ta =1.00 Table of building Weights by Floor Level... Wi : Weight Hi : Height (Wi * Hi^k)Cvx Fx=Cvx * V Sum Story Shear Sum Story MomentLevel # Sum Wi =0.00 k Total Base Shear =0.00 k Base Moment = 0.00 k-ftSum Wi * Hi = 0.0 k-ft Diaphragm Forces : Seismic Design Category "B" to "F"ASCE 7-16 12.10.1.1 Level #Wi Fi Fpx : MaxFpx : CalcdSum Fi Sum Wi Fpx Dsgn. ForceFpx : Min Wpx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Weight at level of diaphragm and other structure elements attached to it. Sum Fi . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sum of "Lat. Force" of current level plus all levels above 0.20 * S * I * WpxMIN Req'd Force @ Level . . . . . . . . . .DS DSMAX Req'd Force @ Level . . . . . . . . . .0.40 * S * I * Wpx Fpx : Design Force @ Level . . . . . . . . . .Wpx * SUM(x->n) Fi / SUM(x->n) wi, x = Current level, n = Top Level