不同类别场地上地铁高架车站结构抗震性能的研究  

Earthquake responses of an elevated subway station structure built on the different classified sites

作　　者：庄海洋[1,2] 周建波[1] 周家甫 张敏敏[1] 

机构地区：[1]南京工业大学岩土工程研究所,江苏南京210009 [2]江苏省土木工程与防灾减灾重点实验室,江苏南京210009

出　　处：《地震工程与工程振动》2017年第2期56-64,共9页Earthquake Engineering and Engineering Dynamics

基　　金：江苏省自然科学基金资助项目(BK20141458);国家自然科学基金项目(51278246)~~

摘　　要：针对城市轨道交通常用的桥建合一高架车站结构形式的特殊性,基于Abaqus有限元软件平台,建立了土-桩-高架车站结构非线性动力相互作用的整体有限元分析模型,考虑输入地震动的频谱特性和场地类别,系统分析了场地类别和输入地震动特性对某地铁桥建合一高架车站结构横向地震反应的影响规律,给出了不同场地类别条件下高架车站结构地震横向变形特征、结构加速度放大效应和地震损伤程度等变化规律。计算结果表明:场地类别对高架车站结构地震反应的影响非常明显,尤其是当场地类别从III类变化到IV类时,其对结构地震反应各方面的影响都更为明显。同时,发现桥建合一高架车站结构站台层上的站台虽然高出站台层不多,但是其对站台层的峰值加速度放大效应尤为明显。To a special structure style for an elevated subway station which is designed as a bridge-station combined structure, the nonlinear dynamic interaction system of the soil-pile-evaluated subway station is modelled by using fi- nite-elements software ABAQUS with considering the spectral characteristics of the input earthquake waves and three different sites. As a result, the seismic performance of the elevated subway station is systematically analyzed. The horizontal deformation, the acceleration response amplification and the earthquake damages of the elevated structure, are given and analyzed. As a result, the effects of the site classification on the earthquake responses of the elevated subway station are obvious, especially when the site classification changes from No. III to No. IV. Meanwhile, though the height of the structure above the platform is not so large, it amplifies the acceleration re- sponse obviously transmitting from the platform floor.

关 键 词：轨道交通 高架车站 场地类别 地震反应 土-结构相互作用 

分 类 号：P315.95[天文地球—地震学] TU411.8[天文地球—固体地球物理学]