隔震层构造不规范对隔震结构减震性能影响研究

Study on effect of irregularities of isolation layer on performance of isolation structures

为研究隔震层构造不规范对隔震结构减震性能的影响,以隔震层构造不规范结构为研究对象,建立双向水平地震作用下的运动方程。用SAP2000软件建立分析模型,对7种常见的隔震构造不规范现象产生的动力响应原理进行定量化分析。对各种构造不规范下结构顶层加速度及层间位移的响应峰值进行对比。用时程分析法对比分析了非隔震结构、隔震结构及隔震层构造不规范结构三者上部结构的地震响应。结果表明,隔震层构造不规范严重影响隔震结构的减震效果。

In order to study the effect of irregularities of isolation layer on isolation performance of isolation structures, the equation of motion under the bidirectional horizontal seismic was established. The analytical model was set by SAP2000 finite element analysis software. Quantitative analyses were made on the dynamic response of seven kinds of inaccurate isolation structures. Comparisons were made on response peaks of the top floor acceleration and interlayer displacement in different conditions of inaccurate structures. Time history analysis method was used to analyze the seismic responses of non-isolated structure, isolation structure and inaccurate isolation structure. The results show that the irregularities of isolation layer affect the isolation performance seriously.