既有建筑隔震加固的可靠性分析

发布时间：2018-06-10 06:08

本文选题：既有建筑 + 结构可靠度　；参考：《河北工业大学》2015年硕士论文

【摘要】：通过对华北地区某小学进行检测和数据整理,利用有限元分析软件Midas/GEN建立结构整体模型,得到结构基础隔震前后的周期、位移、剪力、加速度等数据,并对其进行对比分析;根据考虑变量分布类型的一次二阶矩计算方法对结构构件的可靠度进行计算,利用构件权函数计算得出结构整体可靠度,分别对其进行对比分析。结果表明:1.既有建筑中墙体单元可靠度在结构整体可靠度计算中占比重较大;隔震加固能够明显提高既有建筑结构构件可靠度,采用考虑结构权函数的方法计算结构整体可靠度,能够避免过高估计隔震结构加固后结构整体可靠度。2.隔震加固能够明显提高既有建筑中高厚比较大的墙体的可靠度,并且能减小不同高厚比墙体的可靠度之间的差距,有利于提高结构整体可靠性。3.隔震加固能够减小既有建筑上部结构对地震作用的放大,更利于提高结构的可靠性。
[Abstract]:Through testing and data processing of a primary school in North China, the whole structure model is established by using the finite element analysis software Midas / Gen, and the data of period, displacement, shear force and acceleration before and after isolation of structure foundation are obtained, and the data are compared and analyzed. The reliability of structural members is calculated according to the first-order second-order moment calculation method considering the type of variable distribution. The overall reliability of the structure is calculated by using the component weight function, and the reliability of the whole structure is compared and analyzed respectively. The result shows that 1: 1. In the existing building, the reliability of the wall unit occupies a large proportion in the calculation of the overall reliability of the structure, the seismic isolation and reinforcement can obviously improve the reliability of the existing building structure, and the method of considering the weight function of the structure is used to calculate the overall reliability of the structure. It can avoid overestimating the overall reliability of reinforced isolated structures. Seismic isolation and reinforcement can obviously improve the reliability of the wall with high thickness and large thickness in existing buildings, and can reduce the gap between the reliability of walls with different ratio of height to thickness, which is helpful to improve the overall reliability of the structure. Seismic isolation and reinforcement can reduce the magnification of the seismic action of the superstructure of the existing building and improve the reliability of the structure.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.12

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