加强层对框架-核心筒结构自振特性及内力的影响研究  

Study on the effect of strengthened stories on seismic behavior of frame-core tube structure

作　　者：李云峰[1,2] 陈海涛[1,2] 赵鲁新[1,2] 刘玉娟[1,2] 孙章平[1,2] 谢丹丹[1,2] 

机构地区：[1]山东省土木工程防灾减灾重点实验室(山东科技大学),山东青岛266590 [2]山东科技大学土木工程与建筑学院,山东青岛266590

出　　处：《中国科技论文》2016年第13期1483-1487,共5页China Sciencepaper

基　　金：山东科技大学研究生科技创新基金资助项目(YC150215)

摘　　要：通过有限元软件SATWE建立了32层框架-核心筒结构的三维模型,将加强层数量作为变量,对5种水平加强层设置方案进行自振特性及内力的分析,采用有限元软件SAP2000对外框架柱受力突变情况进行了分析。结果表明:加强层可有效减小结构前两个振型的周期,且对结构振动类型无影响;加强层设置层数越多,结构自振周期减小效果越好,但减小效率逐渐降低;加强层会引起结构内力分配上的突变。最后在总结归纳地震作用,分析加强层的设置对结构自振周期、内力分配及突变的影响规律的基础上,对加强层的设置提出了建议。A three-dimensional finite element model of a 32-storey framecore tube structure was developed by SATWE in this study. The number of strengthened stories was adopted as a variable to analyze the seismic behavior of 5types of framecore tube structures with horizontal strengthened stories. The mutation of internal forces of the frame column was analyzed with finite element software SAP2000. The results showed that the strengthened story can reduce the period of the first two vibration modes, which has no effect on vibration types. The more strengthened stories, the larger reduction is for the natural period of structure. However,the efficiency gradually decreases. The strengthened story causes mutations of internal force distribution The law of natural period,internal force distribution and mutation of the structure with strengthened story were summarized and the location and quantity of the strengthened story was recommended.

关 键 词：结构工程 框架-核心筒结构 加强层 振动类型 内力突变 

分 类 号：TU973.17[建筑科学—结构工程]