考虑建筑不规则性的适度精细化区域震害模拟方法OA北大核心CSTPCD

At present,there are a large number of irregular buildings in region which will have lateral-torsional coupling effect when subjected to earthquake actions resulting in serious damage.However,current seismic damage simulation methods are mainly based on two-dimensional inter-story models,which do not take into account the spatial irregularity of buildings.In addition,the refined finite element simulation methods are unsuitable for the simulation of large number of buildings with high degree of data ambiguity.This paper proposes a moderately refined and efficient analysis method which considers the irregular characteristics of structures and is suitable for regional scale seismic damage simulation of building groups.A moderately-refined-layer-element(MRLE)model is established to simulate the lateral stiffness irregularities in layer level,and the vertical irregularities of the structure are simulated by combining different layer elements in series.Considering the large number of buildings in region,a two-level accelerated dynamic analysis method is proposed to reduce computation time for seismic damage simulation.At the single structure level,a perturbation inelasticity-separated nonlinear dynamic control equation of structure is constructed to improve the efficiency of seismic damage simulation.Furthermore,the OpenMP parallel method is used to simulate the seismic damage of regional buildings,and the computational efficiency of the regional level is accelerated.The numerical calculations and a regional seismic damage simulation show that the proposed method is reliably accurate and efficient,and that the lateral-torsional coupling effects of irregular structures lead to increased damage in regional building seismic damage.