桥梁倒塌模式识别方法:实例分析
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摘要
基于《桥梁倒塌模式识别方法研究:理论分析》一文中极限设计理论的桥梁倒塌模式识别方法,以台湾省二重疏洪道独塔斜拉桥及香港汲水门双塔斜拉桥为例,识别桥梁倒塌模式。其结果采用非线性有限元法进行验证。计算结果表明,简化计算方法能正确识别导致桥梁部分或整体倒塌所必须包含的破坏点,桥梁极限承载力计算误差分别小于1.1%和1.3%。该简化计算方法计算精度高、运算速度快,可用来充分探讨桥梁倒塌机理、识别关键构件,为桥梁抗倒塌设计和加固提供科学依据。
By using the proposed method for identifying bridge collapse pattern based on limit analysis theorem,taken Erchong Floodway single-pylon cable-stayed bridge in Taiwan and Kap Shui Mun twin-pylon cable-stayed bridge in Hong Kong for examples,the bridge collapse patterns were identified and the results were verified by nonlinear finite-element analysis method.It can be seen that the simplified calculation method could correctly identify the damaged components which resulted in total or partial collapse of bridge,the calculation errors of the ultimate load-bearing capacity of the two bridges are less than 1.1% and 1.3% respectively.Since the simplified method is accurate and computationally efficient,it could be used to make sufficient studies on bridge collapse mechanism,identify critical components,as well as provide scientific foundation for bridge collapse-resistance design and reinforcement.
By using the proposed method for identifying bridge collapse pattern based on limit analysis theorem,taken Erchong Floodway single-pylon cable-stayed bridge in Taiwan and Kap Shui Mun twin-pylon cable-stayed bridge in Hong Kong for examples,the bridge collapse patterns were identified and the results were verified by nonlinear finite-element analysis method.It can be seen that the simplified calculation method could correctly identify the damaged components which resulted in total or partial collapse of bridge,the calculation errors of the ultimate load-bearing capacity of the two bridges are less than 1.1% and 1.3% respectively.Since the simplified method is accurate and computationally efficient,it could be used to make sufficient studies on bridge collapse mechanism,identify critical components,as well as provide scientific foundation for bridge collapse-resistance design and reinforcement.
引文
[1]闫冬,任胜健,何勇.桥梁倒塌模式识别方法研究:理论分析[J].公路交通科技,2011,26(8):100-103,114.[J].YAN Dong,REN Shengjian,HE Yong.IdentificationMethod of Bridge Collapse Pattern:Theoretical Analysis[J].Journal of Highway and Transportation Research andDevelopment,2011,2011,26(8):100-103,114.
[2]刘士林.斜拉桥设计[M].北京:人民交通出版社,2006.LIU Shilin,Design of Cable-stayed Bridges[M].Beijing:China Communications Press,2006.
[3]GB18306-2001,中国地震动参数区划图[M].GB18306-2001,Seismic Ground Motion ParameterZonation Map of China[M].
[4]JTG/T B02-01-2008,公路桥梁抗震设计细则[S].JTG/T B02-01-2008,Guidelines for Seismic Design ofHighway Bridges[S].
[5]叶爱君,胡世德,范立础.桥梁支座抗震性能的模拟分析[J].同济大学学报:自然科学版,2001,29(1):6-9.YE Aijun,HU Shide,FAN Lichu.Simulation of SeismicBehavior for Bridge Bearings[J].Journal of TongjiUniversity:Natural Science Edition,2001,29(1):檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸6-9.
[2]刘士林.斜拉桥设计[M].北京:人民交通出版社,2006.LIU Shilin,Design of Cable-stayed Bridges[M].Beijing:China Communications Press,2006.
[3]GB18306-2001,中国地震动参数区划图[M].GB18306-2001,Seismic Ground Motion ParameterZonation Map of China[M].
[4]JTG/T B02-01-2008,公路桥梁抗震设计细则[S].JTG/T B02-01-2008,Guidelines for Seismic Design ofHighway Bridges[S].
[5]叶爱君,胡世德,范立础.桥梁支座抗震性能的模拟分析[J].同济大学学报:自然科学版,2001,29(1):6-9.YE Aijun,HU Shide,FAN Lichu.Simulation of SeismicBehavior for Bridge Bearings[J].Journal of TongjiUniversity:Natural Science Edition,2001,29(1):檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸6-9.
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