[1]苏佶智,刘伯权,马煜东,等.设计参数对RC框架结构抗倒塌性能的影响分析[J].地震工程与工程振动,2019,39(03):084-98.[doi:10.13197/j.eeev.2019.03.84.sujz.009]
 SU Jizhi,LIU Boquan,MA Yudong,et al.Influence of design parameters on seismic collapse resistant performance of RC frame structures[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2019,39(03):084-98.[doi:10.13197/j.eeev.2019.03.84.sujz.009]
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设计参数对RC框架结构抗倒塌性能的影响分析
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《地震工程与工程振动》[ISSN:/CN:]

卷:
39
期数:
2019年03
页码:
084-98
栏目:
论文
出版日期:
2019-06-30

文章信息/Info

Title:
Influence of design parameters on seismic collapse resistant performance of RC frame structures
作者:
苏佶智 刘伯权 马煜东 黄娇 邢国华
长安大学 建筑工程学院, 陕西 西安 710061
Author(s):
SU Jizhi LIU Boquan MA Yudong HUANG Jiao XING Guohua
School of Civil Engineering, Chang’an University, Xi’an 710061, China
关键词:
RC框架结构最大层间位移角性能水平地震易损性抗倒塌性能
Keywords:
RC frame structuremaximum interlayer displacement angleperformance levelseismic fragilitycollapse resistance performance
分类号:
TU352
DOI:
10.13197/j.eeev.2019.03.84.sujz.009
摘要:
结构地震响应输出的强随机性除了主要受地震动非平稳随机激励影响以外,结构自身材料强度、构件尺寸及组合方式等不确定因素的影响同样不容忽视。因此,本文基于课题组完成的RC平面框架低周反复加载试验,以轴压比、梁柱线刚度比、混凝土强度及钢筋强度为变量,对拟建的16榀有限元数值模型进行了抗震性能分析和动力弹塑性时程分析,给出了不同性能水平下结构最大层间位移角的变化范围,研究了轴压比、梁柱线刚度比变化对RC框架结构抗倒塌能力的影响,得到主要结论如下:轴压比增大有利于提高结构的承载力及耗能能力,但延性变形能力会明显下降;降低梁柱线刚度比有利于提高结构的抗震性能;RC框架结构最大层间位移角达到1/620、1/340、1/120、1/30时,可分别作为“基本完好(OP)”、“立即使用(IO)”、“生命安全(LS)”、“防止倒塌(CP)”四个性能水平点的限值;轴压比和梁柱线刚度比的增大会降低RC框架结构的抗倒塌能力、增加结构发生倒塌失效破坏的概率。
Abstract:
The strong randomness of the seismic response output of structures is not only affected by the non-stationary random excitation of ground motion, but also affected by uncertainties such as structural strength, component size and combination. Therefore, the seismic performance analysis and dynamic elastoplastic time history analysis of proposed nineteen finite element models are carried out based on the low-cycle repeated loading test of the RC plane frame, and the axial compression ratio, beam-to-column stiffness ratio, concrete strength and steel strength are variables. The variation range of the maximum interlayer displacement angle of structures under different performance levels is given. The effects of axial compression ratio and beam-to-column stiffness ratio on the collapse resistance of RC frame structures are studied. The main conclusions are as follows:The increase of axial compression ratio is beneficial to improve the bearing capacity and energy dissipation capacity of structures, but the ductility deformation capacity will be significantly reduced. Reducing the beam-to-column stiffness ratio is beneficial to improving the seismic performance of the structure. The points that the maximum interlayer displacement angle of the RC frame structure reaches 1/620, 1/340, 1/120, and 1/30 can be used as the limit of four performance level of "Operational (OP)", "Immediate Occupancy (IO)", "Life Safety (LS)" and "Collapse Prevention (CP)". The increase of axial compression ratio and beam-to-column stiffness ratio will reduce the collapse resistance performance of RC frame structures and increase the collapse failure probability.

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备注/Memo

备注/Memo:
收稿日期:2018-11-3;改回日期:2019-2-15。
基金项目:国家自然科学基金项目(51578077);陕西省国际科技合作与交流计划项目(2016KW-056)
作者简介:苏佶智(1989-),男,博士研究生,主要从事混凝土结构抗震研究.E-mail:sujizhi1989@163.com
通讯作者:刘伯权(1956-),男,教授,博士,主要从事混凝土结构抗震研究.E-mail:bqliu@chd.edu.cn
更新日期/Last Update: 1900-01-01