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中文摘要：
为了研究湿陷性黄土地区基础隔震结构不均匀沉降对其减震性能的影响情况,对比分析了不同区域沉降时对隔震层及上部结构造成的改变,并在此基础上通过动力时程分析计算了地震动作用下结构橡胶隔震支座和层间变形的响应。研究结果表明：不均匀沉降发生后,沉降区域及相邻区域支座的变形和内力均会出现较大变化,并使隔震层及上部结构的梁、柱内力重分布,造成部分构件隐性损伤甚至失效;对于发生不均匀沉降的基础隔震结构,地震作用会导致上部结构的层间位移产生不同程度的增大,进而导致上部结构提前进入下一个能力水平范围。
英文摘要：
In order to study the influence of uneven settlement in the collapsible loess area on the damping performance of the base isolation structure,the changes of the isolation layer and the upper structure under different regional settlements are compared and analyzed,and on the basis of these,the response of rubber isolation bearing and inter-story drift are calculated through the dynamic time history analysis. The results show that： after uneven settlement occurs,the deformation and internal force of isolation bearing have significant changes in the settlement area and adjacent areas of the isolation bearing,the beam and column internal force of the isolation layer and the upper structure are redistributed,furthermore,it can result in the component implicit damage even failure; for uneven settlement of base isolated structure,the earthquake leads to the interlayer displacement in different degree increases of the upper structure,and the upper structure can get into the next ability level range in advance.
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