摘要
高层结构地震输入的合理性对结构抗震设计及地震反应产生重要影响。本文以一典型高层框架结构及其所处场地为参考,建立有软弱夹层场地模型及具有同一卓越周期均匀场地模型,研究该软夹层基础对结构地震输入的影响。由于软弱夹层的存在本文采用了有别于传统的分段等效线性化方法预测地震输入,并与传统的等效线性化方法预测的地震输入对比,研究两种等效线性模型地震输入的差异及软弱夹层存在对地震输入的影响。进一步基于预测地震动分别计算了有无软弱夹层存在下该典型高层框架结构反应,研究软弱夹层存在对结构地震反应的影响。本文结果显示虽然软弱夹层存在会使结构地震动输入时程峰值变低,但结构反应却加剧。分段等效线性化输入模型的地震动加速度峰值普遍大于传统等效线性化模型,但传统等效线性方法预测的地震动计算所得的结构反应更加剧烈。
Reasonable seismic-input of high-rise structure has an important impact on the structural seismic design and seismic response. Based on one typical high-rise frame structure and its site,the soft interlayer site and uniform site with the same characteristics cycles are established,the effect of the soft interlayer on structural seismic- input is studied. Because of the soft interlayer,the equivalent linear method of segment-input that is different from traditional one to calculate the seismic input is adopted and compared with seismic-input provided by the equivalent linear model,and the differences in two equivalent linearization model seismic-input and the effect on the seismicinput with existence of weak interlayer are analyzed. Further,a typical high-rise frame structure is selected to study the influence of structural seismic response under soft interlayer. The result shows that though the soft interlayer will make the peak ground acceleration of seismic-input for the structure lower,but the seismic response of the structure is increased. The peak ground acceleration of equivalent linearization model of segment-input is larger than the equivalent linearization model,but the seismic response of the structure calculated by the traditional method is more intense.
出处
《建筑科学》
CSCD
北大核心
2016年第3期23-30,共8页
Building Science
基金
国家自然科学基金(51178123)
广东省科技计划项目(2013B020200014)
关键词
软弱夹层
分段等效线性化
高层建筑
地震响应
soft interlayer
equivalent linear method of segment-input
high-rise structure
seismic response
作者简介
张日新（1988-），男，研究生1572512807@qq．com
