[1]刘国光,武志玮,程国勇,等.改进敏感性指标法的杆系结构易损性分析[J].深圳大学学报理工版,2014,31(5):504-512.[doi:10.3724/SP.J.1249.2014.05504]
　Liu Guoguang,Wu Zhiwei,Cheng Guoyong,et al.Vulnerability analysis of truss structure by an improved sensitivity index method[J].Journal of Shenzhen University Science and Engineering,2014,31(5):504-512.[doi:10.3724/SP.J.1249.2014.05504]
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改进敏感性指标法的杆系结构易损性分析()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第31卷
期数:
2014年第5期
页码:
504-512
栏目:
土木建筑工程
出版日期:
2014-09-20

文章信息/Info

Title:
Vulnerability analysis of truss structure by an improved sensitivity index method
文章编号:
201405010
作者:
刘国光; 武志玮; 程国勇; 陈琦
中国民航大学机场学院，天津 300300
Author(s):
Liu Guoguang;  Wu Zhiwei;  Cheng Guoyong;  and Chen Qi
Airport College, Civil Aviation University of China, Tianjin 300300, P.R.China
关键词:
空间结构; 杆系结构; 张弦桁架结构; 易损性分析; 敏感性指标; 抗连续倒塌
Keywords:
spatial structure;  truss structure;  truss string structure;  vulnerability analysis;  sensitivity index;  anti-progressive collapse
分类号:
TU 393.3
DOI:
10.3724/SP.J.1249.2014.05504
文献标志码:
A
摘要:
为分析空间杆系结构的易损性，将日本钢结构协会建议的结构敏感性指标改进为体现移除杆件影响的单元敏感性指标. 利用有限元软件ALGOR，计算平面梯形桁架在5种杆件移除工况下剩余杆件的敏感性指标，检验利用单元敏感性指标法判断杆件移除顺序和识别结构倒塌模态的可行性. 将单元敏感性指标法用于张弦桁架结构易损性分析，研究双索张弦桁架结构在不同工况下剩余杆件的单元敏感性指标和结构竖向位移，阐述冗余索降低张弦桁架结构易损性的作用机理，通过有限元软件ANSYS，对构件敏感性指标进行数值计算，分析双索张弦桁架结构动力破坏模态和连续倒塌特性. 结果表明，单元敏感性指标法适用于空间杆系结构易损性分析；冗余索和X型支撑杆的设计方法可增加结构冗余度，降低动力荷载作用下杆件敏感性指标和结构易损性，增强结构抗连续倒塌能力；验证了利用单元敏感性指标法分析杆系结构易损性的可行性.
Abstract:
To analyze the vulnerability of truss structure, the structural sensitivity index suggested by the Japan Steel Construction Society was replaced by a member sensitivity index for reflecting the influences of removing bars. The member sensitivity index of a trapezoid truss in two dimensions was calculated by finite element software ALGOR under five working conditions of removing bars. The feasibility of member sensitivity index method was validated in determining the destroyed sequences of structural members and identifying the mode of structural collapse. Vulnerability analysis of truss structure was conducted by using the member sensitivity index method, structural member sensitivity indexes of remained bars. The structural vertical displacements under different working conditions of truss string structure with double cables were analyzed to illustrate the mechanism of vulnerability changes of truss string structure with the help of redundant cable. A dynamic progressive collapse characteristic analysis of truss string structure with double cables was carried out by the member sensitivity index method through finite element software ANSYS, by which the dynamic failure mode and progressive collapse characteristic of truss string structure with double cables were obtained. The results show that the member sensitivity index method is effective in analyzing vulnerability of spatial truss structure. The structural redundancy degree is increased by setting redundant cable and X-type supporting bars, which decrease member sensitivity index and structural vulnerability and enhance structural anti-progressive collapse ability under dynamic loads. The member sensitivity index method is verified to be feasible in analyzing vulnerability of truss structure.

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备注/Memo

备注/Memo:
Received：2014-04-05；Accepted：2014-06-14
Foundation：National Natural Science Foundation of China(51008065); Young Teacher Training Plan of Civil Aviation University of China(10700222)
Corresponding author：Professor Cheng Guoyong．E-mail: gycheng@cauc.edu.cn
Citation：Liu Guoguang, Wu Zhiwei, Cheng Guoyong, et al. Vulnerability analysis of truss structure by an improved sensitivity index method［J］. Journal of Shenzhen University Science and Engineering, 2014, 31(5): 504-512.（in Chinese）
基金项目：国家自然科学基金资助项目（51008065）；中国民航大学青年骨干教师资助项目（10700222）
作者简介：刘国光（1980—），男（蒙古族），辽宁省朝阳市人，中国民航大学讲师．E-mail：ggliu@cauc.edu.cn
引文：刘国光，武志玮，程国勇，等. 改进敏感性指标法的杆系结构易损性分析［J］. 深圳大学学报理工版，2014，31（5）：504-512.
更新日期/Last Update: 2014-09-11