[1]杨文侠,孙国华,顾 强,等.Y形偏心支撑钢框架结构的抗倒塌性能评估[J].西安建筑科技大学学报(自然科学版),2020,52(06):829-839.[doi:10.15986/j.1006-7930.2020.06.008 ]
　YANG Wenxia,SUN Guohua,GU Qiang,et al.Collapse-resisiting evaluation of Y-eccentric braced steel frames under severe earthquake[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(06):829-839.[doi:10.15986/j.1006-7930.2020.06.008 ]
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Y形偏心支撑钢框架结构的抗倒塌性能评估()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
52
期数:
2020年06期
页码:
829-839
栏目:
出版日期:
2020-12-20

文章信息/Info

Title:
Collapse-resisiting evaluation of Y-eccentric braced steel frames under severe earthquake
文章编号:
1006-7930(2020)06-0829-11
作者:
杨文侠1; 3; 孙国华2; 顾 强2; 万家福3; 方有珍2
(1.上海交通大学 船舶海洋与建筑工程学院,上海 200240; 2.苏州科技学院 土木工程学院,江苏 苏州 215011; 3.江苏沪宁钢机股份有限公司,江苏 宜兴 214231)
Author(s):
YANG Wenxia1; 3;  SUN Guohua2;  GU Qiang2; WAN Jiafu3;  FANG Youzhen2
(1.School of Naval Architecture, Ocean and Civil Engineering,Shanghai Jiaotong Univ., Shanghai 200240, China; 2. School of Civil Engineering, Suzhou University of Science and Technology,Jiangsu Suzhou 215011, China; 3.Jiangsu Huning Steel Structure&Mechinery Co.Ltd,Jiangsu Yixing 214231, China)
关键词:
Y形偏心支撑钢框架;  结构影响系数;  易损性分析;  倒塌富裕度;  倒塌概率;  性能评估
Keywords:
Y-eccentric braced steel frames;  response modification factors;  fragility analysis;  collapse margin ratio;  collapse probability;  performance evaluation.
分类号:
TU393.2
DOI:
10.15986/j.1006-7930.2020.06.008
文献标志码:
A
摘要:
按结构影响系数R=3.4设计了4个不同层数的Y形偏心支撑钢框架结构算例,利用ATC推荐的44条远场地震波,用增量动力分析(incremental dynamic analysis,IDA)方法对各算例进行了抗震易损性分析,采用基于结构抗倒塌富裕度(collapse margin ratio,CMR)的性能评估方法,评估了结构在罕遇地震和特大地震下的倒塌概率.研究发现:按结构影响系数R=3.4设计的Y形偏心支撑钢框架的倒塌富裕度CMR随结构总层数的增加呈增大趋势,所有算例在罕遇地震下的倒塌概率不超过10%(在5%～10%之间),Y形偏心支撑钢框架基于性态设计时结构影响系数R可取3.4.
Abstract:
Four Y-eccentric braced steel frames with various stories were designed and complying with the response modification factors of 3.4. Based on incremental dynamic analysis with 44 far-field ground motions recommended by ATC, the collapse fragility analyses of all structures were carried out. At the same time, the collapse probability of these structures under rare earthquake and huge earthquake was evaluated according to the performance evaluation method based on collapse margin ratio. Results show that the collapse safety increase with total storey number and the collapse probability of all frames under rare earthquake ranges between 5%～10%, which means that the suggested response modification factors of 3.4 for Y-eccentric braced steel frames can meet the prescribed collapse performance objective i.e. 10% conditional collapse probability under rare earthquake. Therefore, the R of 3.4 is acceptable for Y-eccentric braced steel frames in performance-based seismic design.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-06-17 修改稿日期:2020-09-15
基金项目:中国博士后基金资助项目(2013M531295)
第一作者:杨文侠(1978- ),男,博士后,高级工程师,主要研究钢结构与组合结构.E-mail:darky1978@163.com

更新日期/Last Update: 2020-12-20