QQ客服 官方微博 反馈留言

	不同地震剪力系数控制方案对某超高层建筑结构抗震性能的影响
	刘斌 ; 齐五辉 ; 叶列平 ; 陆新征 ; 陈彬磊 ; LIU Bin ; QI Wuhui ; YE Lieping ; LU Xinzheng ; CHEN Binlei
	2016-03-30 ; 2016-03-30
关键词	超高层建筑 地震剪力系数 抗震性能 弹塑性分析 材料用量 TU973.31
其他题名	Influence of different seismic shear force coefficient control methods on seismic performance of a super-tall building
中文摘要	地震剪力系数是结构抗震设计的重要参数,我国现行抗震设计规范对最小地震剪力系数有明确的限值要求,当楼层的最小地震剪力系数不满足要求时,需调整结构基底剪力和各楼层的水平地震剪力使其满足规范的要求,当基底剪力与规范限值相差较多时,尚需调整结构布置或改变结构体系使其满足要求。工程实践表明,对于基本周期较长的超高层建筑一般很难满足最小剪力系数限值要求,若采用调整结构布置的方法,往往会导致材料用量大幅增加。以位于8度抗震设防区的某超高层建筑结构为例,分别采用三种不同的楼层地震剪力系数控制方案建立三个模型,并对其进行了多遇地震弹性分析、罕遇地震弹塑性分析和材料用量对比。研究表明,改变结构布置使所有楼层的计算地震剪力系数满足规范要求设计的结构(模型A),刚度最大,材料用量最大;对不满足最小地震剪力系数要求的楼层,采用放大地震剪力按规范验算位移,并进行构件设计的结构(模型B),其刚度和材料用量均低于模型A;不改变结构布置,先按规范验算位移,再对不满足最小地震剪力系数要求的楼层放大地震剪力使之满足规范要求并进行构件设计的结构(模型C),其刚度和材料用量均略低于模型B。在罕遇地震作用下结构弹塑性响应方面,三个模型均能满足规范要求,模型B与模型C的位移响应较为接近,模型A的位移响应略小。; The seismic shear force coefficient is the key parameter of structural seismic design. There are clear specifications for the minimum seismic shear force coefficient in Chinese seismic design code. When this requirement cannot be satisfied,it is required to adjust the design base shear force and story shear force to meet the limitation. If the gap between the target design base shear force and the actual base shear force is too large,it is required to change the structural arrangement or the structural system. Engineering practice shows that if using the method of changing structural arrangement,the amount of construction materials will be too large for a super-tall building whose vibration period is very long and the minimum seismic shear force coefficient is hard to meet the requirement. A super-tall building using three control methods of seismic shear force coefficient was studied. The seismic performance and amount of construction materials were compared and analyzed through elastic analysis and elasto-plastic analysis. The model A,whose structural stiffness was adjusted to meet the seismic shear force coefficient limit,has the largest structural stiffness and highest cost. The model B,whose designed base shear force was adjusted to meet the minimum seismic shear force and the maximum story drift,has lower cost and smaller structural stiffness than the model A. The model C,whose designed base shear was adjusted to meet the minimum seismic shear force has lower cost and smaller structural stiffness than the model B. After large numbers of nonlinear time history analysis,it is found that all the models can meet the displacement limitations in the code. The displacement response of the model B and model C are close. The displacement response of the model A is a bit smaller than the other models.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/149054]
专题	清华大学
推荐引用方式 GB/T 7714	刘斌,齐五辉,叶列平,等. 不同地震剪力系数控制方案对某超高层建筑结构抗震性能的影响[J],2016, 2016.
APA	刘斌.,齐五辉.,叶列平.,陆新征.,陈彬磊.,...&CHEN Binlei.(2016).不同地震剪力系数控制方案对某超高层建筑结构抗震性能的影响..
MLA	刘斌,et al."不同地震剪力系数控制方案对某超高层建筑结构抗震性能的影响".(2016).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。