掉层层数对框支结构抗震性能的影响探讨  

Discussion on influence of dropped floor numbers on seismic performance of frame-supported structures

作　　者：万正义 WAN Zhengyi(ChongQing Architectural Design Institute Co.,LTD.,Chongqing 400015,China)

机构地区：[1]重庆市设计院有限公司,重庆400015

出　　处：《建筑结构》2022年第12期64-69,共6页Building Structure

摘　　要：掉层结构为山地建筑常用的结构形式,基于实际工程遇到的问题,对不同掉层层数的框支转换结构进行弹塑性计算,得到框支柱、转换层、框支框架的内力及性能水准结果,分析了掉层层数对不同种类框支框架的抗震性能的影响。得到带掉层框支转换结构中框支框架设计中应注意的部分问题及经验:一端框支柱位于上接地端,另一端框支柱位于下接地端的框支框架应避免出现;框支柱均位于上接地端的框支框架宜避免设置,如若设置,应重点加强框支柱抗剪;框支柱均位于下接地端的框支框架随着掉层层数增加,抗震性能提高。Structure supported by foundations with different elevations is a common structural form in structures on a slope. Based on the problems encountered in practical projects, the elastic-plastic calculation of frame-supported transfer structure with different dropped floor numbers were carried out, and the internal forces and performance levels of frame-supported column, transfer floor and frame-supported frame were obtained. The influence of different dropped floor numbers on seismic performance of different kinds of frame-supported frame was analyzed. Some issues and experience to pay attention to in the related design of frame-supported frame in the frame-supported transfer structure with dropped floors were obtained: the frame-supported frame with one end supporting columns on upper embedding end and the other end supporting columns on lower embedding end should be avoided;the frame-supported frame with all supporting columns on upper embedding end should be avoided, if they are installed, the shear capacity of supporting columns should be strengthened;the seismic performance of the frame-supported frame with all supporting columns on lower embedding end is improved with the increase of dropped floor numbers.

关 键 词：掉层结构 框支转换 框支柱 掉层层数 抗震性能 

分 类 号：TU973[建筑科学—结构工程]