某近断层高层建筑采用隔震技术的相关问题研究

Research on an isolated high-rise structure near to fault zone

以一紧邻断裂带高层建筑为例,进行高层建筑基础隔震技术运用相关问题,特别是竖向地震问题的分析研究.采用连接单元和缝单元并联模拟隔震支座,分析水平地震动作用下结构减震系数和隔震层位移;对比竖向地震动作用下规范规定计算方法、振型分解反应谱法和时程分析法计算所得结构内力.结果表明:结构水平向减震效果良好,隔震层位移控制和支座拉压承载力满足要求,反应谱法和时程分析法计算结果更为合理.

In the paper, related researches on an isolated high -rise structure near to fault zone were carried out. Joint element and gap element were connected in parallel to simulate rubber bearing. Seismic isolation coefficient and displacement of the isolation layer under the horizontal earthquake were analyzed. Inner forces of the structure under vertical earthquakes, using specified method in code, modal response spectrum analysis method and time history analysis method, were compared. Results indicate that horizontal isolation effect of the structure is well. Control effect of the displacement of isolation layer and tension and compression bearing capacities of the bearings meet the requirements of the code. Computation results of modal response spectrum analysis method and time history analysis method are much more reasonable.