埋深比对地铁车站与临近多层建筑峰值加速度响应的影响

为了对城市密集建筑区的抗震设计提供理论依据和参考，以三层三跨岛式车站和多层框架建筑为研究对象，采用有限元软件Abaqus对层状场地中由地铁车站与两个框架结构所组成的左右对称模型进行数值模拟实验，分析了不同埋深比对结构-土-结构相互作用(structure-soil-structure interaction, SSSI)效应的影响规律。结果表明，在地震作用下，当地铁车站埋深比小于等于1.5时，地铁车站与临近多层框架建筑间的SSSI效应对车站下半部分和上方框架结构所产生的不利影响值得重视；在埋深比增大过程中，临近建筑对车站上半区域的有利影响以及对车站整体的其他影响逐渐减弱，而车站对临近建筑的影响会整体趋向有利；地震动的频谱特性是地铁车站与临近多层建筑间地震反应的主要影响因素之一。

Influence of Buried Depth Ratio on Peak Acceleration Response of Subway Station and Adjacent Multi-story Buildings

In order to provide theoretical basis and reference for seismic design of urban dense building area, taking three-story three-span island station and multi-story frame building as research objects, the numerical simulation experiment of left-right symmetrical model composed of subway station and two frame structures in layered site was carried out by using finite element software Abaqus, and the influence of different buried depth ratio on structure-soil-structure interaction (SSSI) effect was analyzed. The results show that under the earthquake, when the buried depth ratio of the subway station is less than or equal to 1.5, the adverse effects of the SSSI effect between the subway station and the adjacent multi-story frame buildings on the lower half of the station and the upper frame structure should be paid attention to. In the process of increasing the buried depth ratio, the favorable influence of the adjacent buildings on the upper half of the station and other effects on the whole of the station gradually weakens, while the influence of the station on the adjacent buildings tends to be favorable as a whole. The frequency spectrum characteristic of ground motion is one of the main factors affecting the seismic response between subway station and adjacent multi-story buildings.