基于构件重要性系数的结构易损性分析
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摘要
为了有效地管理大型复杂结构并减少各种灾害的损失,采用数值计算方法,对结构易损性和连续倒塌展开研究已成为目前国际社会研究的热点。从结构易损性的基本原理入手,提出了一种基于构件重要性系数的结构易损性分析方法。它基于构件刚度的重要性系数,并通过其与冗余度的关系来求出各构件的冗余度,用结构的整体冗余度和构件的局部冗余度来搜索结构的失效模式,以此来寻找结构中的薄弱环节,并通过结构的应变能来寻找结构的最易损失效路径。最后通过一个五层钢框架算例来验证。研究发现,所提出的方法是可行的、有效的。
Structural function decreases due to structural and material deterioration. In order to effectively manage large-scale and complex structures and reduce damage extents by various disasters,it is nowadays a focus to investigate the structural vulnerability and continuous collapse. In this paper,the principle of structural vulnerability is introduced,and then a new structural vulnerability analysis method based on the important factors of members is proposed. In the method proposed,the important factors of members are calculated,and then the redundancy of each member is obtained using the relationship between the redundancy and the important factors. The failure mode is searched through the redundancy. Therefore,the weak link is found and the fragile failure path is determined by the strain energy. A case study is conducted using a five-story steel frame. The results show that the proposed method is feasible and effective.
Structural function decreases due to structural and material deterioration. In order to effectively manage large-scale and complex structures and reduce damage extents by various disasters,it is nowadays a focus to investigate the structural vulnerability and continuous collapse. In this paper,the principle of structural vulnerability is introduced,and then a new structural vulnerability analysis method based on the important factors of members is proposed. In the method proposed,the important factors of members are calculated,and then the redundancy of each member is obtained using the relationship between the redundancy and the important factors. The failure mode is searched through the redundancy. Therefore,the weak link is found and the fragile failure path is determined by the strain energy. A case study is conducted using a five-story steel frame. The results show that the proposed method is feasible and effective.
引文
[1]邱德锋,周艳,刘西拉.突发事故中结构易损性的研究[J].四川建筑科学研究,2005,31(2):55-59.
[2]王丹.钢框架结构的地震易损性及概率风险分析[D].哈尔滨:哈尔滨工业大学图书馆,2006.6.
[3]吕大刚,王光远.基于可靠度和灵敏度的结构局部地震易损性分析[J].自然灾害学报,2006,15(4):157-16.
[4]江大绥,贺军利,张凤新.静力弹塑性分析(Pushover Analysis)的基本原理和计算实例[J].世界地震工程,2004,20(1):45-53.
[5]杜鹏.钢筋混凝土桥梁的地震易损性分析[J].工程抗震与加固改造,2007,29(1):89-93.
[6]柳承茂,刘西拉.基于刚度的构件重要性评估及其与冗余度的关系[J].上海交通大学学报,2005,39(5):746-75.
[7]叶燎原,潘文.结构静力弹塑性分析(Pushover Analysis)的原理和计算实例[J].建筑结构学报,2000,21(2):37-43.
[8]Emrah Erduran and Ahmet Yakut.Vulnerability assessment of reinforced concrete moment resisting frame buildings[J].Journal of Structural Engineering,2007,133(4):576–586.
[9]于刚,孙智,孙立民,等.基于结构易损性分析的桥梁检测系统概念设计[C].城市桥梁养护管理与检测、维修加固技术交流研讨会论文集,昆明,2007.6:208-215.
[10]杨博.基于刚度的重要性系数结构易损性分析方法[D].沈阳:沈阳建筑大学,2009.
[2]王丹.钢框架结构的地震易损性及概率风险分析[D].哈尔滨:哈尔滨工业大学图书馆,2006.6.
[3]吕大刚,王光远.基于可靠度和灵敏度的结构局部地震易损性分析[J].自然灾害学报,2006,15(4):157-16.
[4]江大绥,贺军利,张凤新.静力弹塑性分析(Pushover Analysis)的基本原理和计算实例[J].世界地震工程,2004,20(1):45-53.
[5]杜鹏.钢筋混凝土桥梁的地震易损性分析[J].工程抗震与加固改造,2007,29(1):89-93.
[6]柳承茂,刘西拉.基于刚度的构件重要性评估及其与冗余度的关系[J].上海交通大学学报,2005,39(5):746-75.
[7]叶燎原,潘文.结构静力弹塑性分析(Pushover Analysis)的原理和计算实例[J].建筑结构学报,2000,21(2):37-43.
[8]Emrah Erduran and Ahmet Yakut.Vulnerability assessment of reinforced concrete moment resisting frame buildings[J].Journal of Structural Engineering,2007,133(4):576–586.
[9]于刚,孙智,孙立民,等.基于结构易损性分析的桥梁检测系统概念设计[C].城市桥梁养护管理与检测、维修加固技术交流研讨会论文集,昆明,2007.6:208-215.
[10]杨博.基于刚度的重要性系数结构易损性分析方法[D].沈阳:沈阳建筑大学,2009.
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