一、前言 现行的水平地震荷载计算法是用单质点弹性体系算得P=αW,然后以结构影响系数C修正为P=cαW。这里P是水平地震荷载,α叫地震影响系数,W是质点的重量。多质点体系的水平地震荷载为P_(ji)=cα_jγ_jx_(ij)W_i,在此P_(ij)为作用第j振型第i个质点上的水平地震荷载,γ_j为第j振型参与系数,x_(ij)为结构第j振型中第i个质点 I. INTRODUCTION The current horizontal seismic load calculation method is to calculate P = αW using the elemental point elastic system and then correct it as P = cαW with the structural influence coefficient C. Where P is the horizontal seismic load, α is the seismic influence coefficient, and W is the mass weight. The horizontal seismic load of the multi-particle system is P ji = cαjjjjjjjjjjjjjj where Pjj is the horizontal seismic load on the ith particle of the j-th mode of action, jj is the participation coefficient of the jth mode, x_ (ij) is the ith particle in the jth mode of the structure