不同地质条件下河流对临近建筑物的地震反应影响分析

为了研究不同地质条件下临近河流建筑物的抗震能力及河流存在对建筑物地震反应的影响，分别采用三种适合于软弱场地、中软场地、中硬场地的地震波，对三种场地土、河流与建筑物构成的相互作用体系进行时域内数值分析。计算结果表明，建筑物靠近河流时，体系顶层总位移明显增大，且软弱场地时基础平动与摆动引起的水平位移成分的幅度明显大于中软、中硬场地;场地土越软，基础转动引起的摆动分量和平动分量在体系顶层总加速度中所占比重越大，而结构顶层弹性变形加速度分量则不断减小。

Analysis of Seismic Response of River to Nearby Structure Under Different Geological Conditions

In order to study the seismicbehavior of structures close by a river and the effect of river on a structure, by time domain numerical method, this paper analyzes three interaction systems composed of soil, river and structure using three seismic waves suitable for soft sites, medium soft sites and medium hard sites. The result of calculation shows that, when structure closes the river, the total displacement at the top of a superstructure increases obviously. On a soft site, the displacement brought by movement and swing of foundation is bigger than on a medium soft site and medium hard site. On the total acceleration response at the top of superstructure, the softer the soil is, the bigger the component produced by movement and swing of the foundation willbe, but the smaller the component produced by the elastic deformation of the top of the structure will be.