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角部重叠形平面布置框架结构抗震性能研究

发表时间:2017-07-31  浏览量:100  下载量:22
全部作者: 曹羽,蒋欢军
作者单位: 同济大学结构工程与防灾研究所
摘 要: 为研究重叠面积比对角部重叠形平面布置结构抗震性能的影响,以典型的10层钢筋混凝土框架为研究对象,首先采用ETABS软件进行小震下的弹性反应谱分析,然后选择2条人工波(artificial waves,AW)和5条天然波,采用Perform-3D软件进行大震下的弹塑性时程分析。小震和大震的分析结果均表明,随着角部重叠面积比的减小,结构扭转反应增强,重叠部位受力变大,大震下的结构总体损伤加重。在扭转效应和协调变形方面,重叠面积比在大震下的影响比小震更为显著。故应严格限制角部重叠形结构的重叠面积比,以减轻此类结构震害。
关 键 词: 土木建筑结构;抗震性能;弹塑性时程分析;角部重叠;钢筋混凝土框架结构
Title: Study on seismic performance of frame structure with corner-overlapped plane
Author: CAO Yu, JIANG Huanjun
Organization: Research Institute of Structural Engineering and Disaster Reduction, Tongji University
Abstract: To study the effect of overlapping area ratio on the seismic behavior of frame structure with corner-overlapped plane, this paper focuses on typical 10-story reinforced concrete frame structures. Firstly, the elastic response spectrum analysis under the frequent earthquakes is conducted with ETABS software. Then, 2 artificial waves (AW) and 5 natural seismic waves are selected for each model. Elasto-plastic time-history analysis under the rare earthquakes is carried out to make further study on the influence of overlapping area ratio with Perform-3D software. All results of these analyses show that the smaller the overlapping area ratio is, the stronger the torsion effect of structure is, the greater the internal forces in the overlapping area are, and the more severe the structural damage under rare earthquakes becomes. In the aspects of torsion effect and deformation compatibility, the influence of overlapping area ratio on seismic performance of these structures under rare earthquakes is more significant than that under frequent earthquakes. Therefore, it is necessary to limit the overlapping area ratio of structure of corner-overlapped plane strictly in order to reduce the damage of structure under earthquakes.
Key words: civil engineering structure; seismic performance; elasto-plastic time-history analysis; corner-overlapped plane; reinforced concrete frame structure
发表期数: 2017年7月第14期
引用格式: 曹羽,蒋欢军. 角部重叠形平面布置框架结构抗震性能研究[J]. 中国科技论文在线精品论文,2017,10(14):1629-1637.
 
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