【摘要】 随着城市建设的推进，城市地下结构逐渐向着大体量、复杂化方向发展，地震动的空间效应不容忽视。本文以北京城市副中心站综合交通枢纽工程为研究对象，采用三维精细化有限元数值模拟方法，从时域和频域角度对比分析了考虑与不考虑行波效应时结构的变形和内力响应特征。结果表明，地震动输入方式会显著影响场地和地下结构的地震响应。考虑行波效应时，北京城市副中心站综合交通枢纽结构的加速度和位移响应均减小，并且结构地震响应表现出明显的自身振动特性，频谱成分更加复杂。结构不同断面的地震响应表现出明显“不同步”现象，致使同一时刻不同断面的横向位移差增大，结构地震响应的空间变异性增加。虽然北京城市副中心站综合交通枢纽大部分区域的层间位移角和柱内力在考虑行波效应时减小，但在一些横向刚度沿纵向变化较大的区域，柱弯矩明显增大，个别位置的层间位移角明显增大。更多还原

【Abstract】 With the advancement of urban construction,urban underground structures are gradually developing towards larger volumes and more complex configurations,and the spatial effects of ground motion cannot be ignored. Based on the Beijing Urban Sub-center Station Integrated Transportation Hub project, this paper adopts the three-dimensional refined finite element numerical simulation method, and comparatively analyzes the deformation and internal force response characteristics of the Beijing Urban Sub-center Station Integrated Transportation Hub structure when considering and not considering the traveling wave effect from the perspectives of the time and frequency domains. The results show that the input method of ground motion significantly affects the seismic response of the site and underground structures. When the traveling wave effect is considered,both the acceleration and displacement responses of the structure decrease,and the structural seismic response exhibits obvious self-vibration characteristics with more complex spectral components. The seismic responses of different sections of the structure show an obvious “ asynchronous” phenomenon, which leads to an increase in the lateral displacement difference between different sections at the same time and an increase in the spatial variability of the structural seismic response. Although the inter-story drift angle and column internal force in most areas of the Sub-center Station Integrated Transportation Hub decrease when the traveling wave effect is considered, the column bending moment in some areas where the lateral stiffness changes greatly along the longitudinal direction increases significantly,and the inter-story drift angle at individual positions increases.更多还原