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多层基础隔震结构考虑近场影响的计算方法

发布时间:2018-04-03 15:36

  本文选题:近断层脉冲型地震作用 切入点:近场影响系数 出处:《建筑结构》2016年S1期


【摘要】:基础隔震结构的近断层脉冲型地震作用与常规地震作用相比,结构的最大绝对加速度、隔震层的最大位移均有较大增加。通过算例分析,采用时程分析法对近断层脉冲型地震作用的隔震结构计算时,罕遇地震下的峰值加速度的取值决定了隔震支座的选择。通过对《建筑抗震设计规范》(GB 50011—2010)12章及附录L简化计算方法的分析,三种罕遇地震峰值加速度取值对应三种隔震支座布置的计算结果,8度区多层框架结构,建议采用插值法进行罕遇地震下隔震层计算,隔震层以上结构的水平地震影响系数最大值,抗规公式(12.2.5)应乘以近场影响系数。
[Abstract]:Compared with conventional earthquake, the maximum absolute acceleration and the maximum displacement of isolation layer of the base isolated structure are greatly increased.Through the example analysis, the peak acceleration value under rare earthquake determines the choice of isolation support when calculating the isolated structure acting on near fault pulse type earthquake by using time history analysis method.Based on the analysis of the simplified calculation method of chapter 12 of GB50011-2010 / 12 and appendix L, the calculation results of three kinds of seismic peak acceleration corresponding to three kinds of seismic isolation support arrangement are analyzed, and the calculation results of multi-story frame structure in 8 degree zone are given.It is suggested that the method of interpolation should be used to calculate the isolation layer under rare earthquakes. The maximum horizontal seismic influence coefficient of the structure above the isolated layer and the formula of resistance to earthquake should be multiplied by the near-field influence coefficient.
【作者单位】: 云南省安泰建设工程施工图设计文件审查中心;昆明理工大学建筑工程学院;云南震安减震科技股份有限公司;
【分类号】:TU352.12


本文编号:1705824

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