某部分框支剪力墙结构等效刚度比控制分析  

Analysis on equivalent stiffness ratio control of partial frame-supported shear wall structure

作　　者：张昊强 李聪龄 Zhang Hao-qiang;Li Cong-ling(Gansu Institute of Architectural Design and Research Co.Ltd,Lanzhou 730030,China)

机构地区：[1]甘肃省建筑设计研究院有限公司,甘肃兰州730030

出　　处：《工程抗震与加固改造》2024年第1期124-132,共9页Earthquake Resistant Engineering and Retrofitting

摘　　要：转换层下部结构刚度对部分框支剪力墙结构的竖向刚度规则性和地震剪力传递突变程度有较大影响,等效刚度比是衡量转换层下部结构相对刚度的重要设计指标。本文对8度区某部分框支剪力墙结构等效刚度比的控制进行分析讨论。首先,通过转换层下部结构高度线性插值对等效刚度比进行修正,其次,通过调整转换层层高和转换层下部结构剪力墙厚度两种方式,分析不同等效刚度比对结构整体指标、构件受力和结构整体抗震性能的影响。结果表明,等效刚度比越大,转换层与其上一层的层间位移角比和有害层间位移角比越小,等效刚度比小于1.0时,转换层与其上一层的有害位移角比突变增大;设置转换层对转换层以上3层的地震剪力分配产生了较大影响;框支框架的相对刚度比越大,水平力传递突变程度越小;随着等效刚度比增加,结构主要屈服部位由结构底部转移至转换层以上部位。The stiffness of structure below transfer floor has a great influence on the regularity of the vertical stiffness and sudden of seismic shear for partial frame-supported shear wall structure.The equivalent stiffness ratio was an important design index to measure stiffness of structure below transfer floor.The equivalent stiffness ratio control of a frame supported shear wall structure on the zone of fortification intensity 8 was analyzed and discussed.First,the equivalent stiffness ratio is modified by linear interpolation of height of structure below transfer floor.By adjusting the floor height and the shear wall thickness of the transfer floor substructure,effects of different equivalent stiffness ratios on overall calculation index of structure,member mechanical performance and overall seismic performance of structure were analyzed.The results show that the greater the equivalent stiffness ratio,the smaller story drift ratio and harmful inter-story drift ratio.When the equivalent stiffness ratio was less than 1.0,the harmful inter-story drift ratio suddenly increases.Setting of transfer floor has a great impact on the shear force distribution of the three floors above the transfer floor.The greater the relative stiffness ratio of frame supported frames,the smaller the mutation degree of shear transfer.With the increase of equivalent stiffness ratio,the main yielding parts of the overall structure are transferred from the bottom of the structure to the parts above the transfer floor.

关 键 词：部分框支剪力墙结构 等效刚度比 转换层下部结构刚度 传力途径 屈服机制 

分 类 号：TU973.31[建筑科学—结构工程]