地基不均匀沉降对基础隔震结构地震易损性的影响
发布时间：2019-01-26 18:57
【摘要】：为了研究地基不均匀沉降对基础隔震结构抗震性能的影响,对比分析发生沉降的的基础隔震结构和未发生沉降的隔震结构,从能量的角度入手,引入综合考虑变形和能量的双参数损伤模型对其上部结构进行损伤分析,并以楼层最大损伤指数为量化指标,对其上部结构进行了易损性分析。研究结果表明:不均匀沉降发生后,隔震支座位移变大;在地震动作用下,上部结构楼层损伤增加;发生沉降的基础隔震结构超越各级极限破坏状态的概率大于未沉降的隔震结构,更容易遭受地震破坏。
[Abstract]:In order to study the effect of uneven settlement of foundation on seismic performance of foundation isolated structure, the foundation isolated structure with settlement and the isolated structure without settlement are compared and analyzed from the angle of energy. A two-parameter damage model considering the deformation and energy is introduced to analyze the damage of the superstructure. The maximum damage index of the floor is taken as the quantitative index to analyze the vulnerability of the superstructure. The results show that the displacement of the isolation support becomes larger after the uneven settlement occurs, and the damage of the upper structure floor increases under the action of ground motion. The probability that the base isolated structure with settlement exceeds the limit failure state of each level is more likely to be damaged by earthquake than that of the unsettled isolated structure.
【作者单位】： 兰州理工大学防震减灾研究所;兰州理工大学西部土木工程防灾减灾教育部工程研究中心;
【基金】：国家自然科学基金资助项目(51578274)
【分类号】：TU352.1;TU433
本文编号：2415798
[Abstract]:In order to study the effect of uneven settlement of foundation on seismic performance of foundation isolated structure, the foundation isolated structure with settlement and the isolated structure without settlement are compared and analyzed from the angle of energy. A two-parameter damage model considering the deformation and energy is introduced to analyze the damage of the superstructure. The maximum damage index of the floor is taken as the quantitative index to analyze the vulnerability of the superstructure. The results show that the displacement of the isolation support becomes larger after the uneven settlement occurs, and the damage of the upper structure floor increases under the action of ground motion. The probability that the base isolated structure with settlement exceeds the limit failure state of each level is more likely to be damaged by earthquake than that of the unsettled isolated structure.
【作者单位】： 兰州理工大学防震减灾研究所;兰州理工大学西部土木工程防灾减灾教育部工程研究中心;
【基金】：国家自然科学基金资助项目(51578274)
【分类号】：TU352.1;TU433
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