| 荷载增量法的改进及应用 |
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| 引用本文： | 肖龙,侯建国,董黛,安旭文,李茂华.荷载增量法的改进及应用[J].武汉水运工程学院学报,2013(5):1066-1070. |
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| 作者姓名： | 肖龙 侯建国 董黛 安旭文 李茂华 |
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| 作者单位： | [1]武汉大学土木建筑工程学院,武汉430072 [2]中信建筑设计研究总院有限公司,武汉430014 [3]中国电力科学研究院,北京100055 |
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| 摘 要： | 结构系统可靠度分析的关键问题是结构系统主要失效模式的识别.基于荷载增量法,提出了3项改进策略.改进后的荷载增量法考虑了荷载和抗力的变异性对约界参数的影响,删除了冗余失效模式,简化了全局约界的实现步骤,在不遗漏主要失效模式的基础上提高了识别效率.通过10杆桁架和输电线路杆塔结构主要失效模式识别的算例分析,验证了改进后的荷载增量法的正确性和合理性.
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| 关 键 词： | 系统可靠度 失效模式 荷载增量法 约界参数 |
Improvement and Application of Load Increment Method |
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| Authors: | XIAO Long HOU Jianguo DONG Dai AN Xuwen LI Maohua |
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| Institution: | 1.School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China ; CITIC General Institute of Architectural Design and Research Co., Ltd., Wuhan 430014, China; 2.China Electric Power Research Institute, Beijing 100055, China;) |
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| Abstract: | Enumerating significant failure modes is the key problem of structural reliability analysis.Based on load increment method,three improvement strategies are proposed.Firstly,functional relationship between bounded parameters and variation coefficient of load and resistance is given.Secondly,redundancy failure modes are deleted.Thirdly,approach of global boundary is simplified.Confirmed by trial calculation,accuracy can meet the need of engineering demand and scientific research.These strategies can improve the enumeration efficiency of dominant failure modes and laid a solid foundation for the structural reliability analysis. |
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| Keywords: | system reliability failure mode load increment method bounded parameters |
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