斜拉-悬吊协作体系桥地震反应分析
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摘要
为研究斜拉-悬吊协作体系桥的抗震性能,以一座主跨1 400m的斜拉-悬吊协作体系桥方案为背景进行分析。采用MIDAS Civil建立桥梁三维有限元模型,采用地震反应谱和时程分析方法进行水平和竖向地震作用下结构的地震反应分析以及结构非线性对地震反应的影响分析,并通过与相同主跨悬索桥和斜拉桥方案地震反应的对比,探讨斜拉-悬吊协作体系桥在超大跨度桥梁中的适用性。结果表明:在水平地震作用下,斜拉-悬吊协作体系桥塔、梁结合处的主梁和塔柱以及塔底截面产生最大内力,应重视这些关键截面的抗震设计;斜拉-悬吊协作体系桥的抗震性能介于斜拉桥与悬索桥之间,更偏向于悬索桥,比斜拉桥优越,适用于主跨超千米的大跨度桥梁。
To study the seismic performance of the combined cable-stayed and suspension bridge,aproposed bridge of the same kind with a main span of 1 400 m was taken as an example and was analyzed.The three-dimensional finite element model for the bridge was set up by the MIDAS Civil,the structural seismic responses of the bridge under the horizontal and vertical seismic action and the influence of the structural nonlinearity on the seismic responses were analyzed by the seismic response spectrum and the time-history analysis methods.Through comparison of the seismic responses of the bridge to those of a suspension bridge and a cable-stayed bridge having the same main spans,the adaptability that the bridge was to be used as the super long span bridge was studied.The results of the study show that under the horizontal seismic action,the greatest internal forces may occur in the main girder at the connections of the towers and girder and in the cross sections of the tower columns and tower footings of the bridge and therefore,special attention should be paid to the seismic design of these critical locations and cross sections.The seismic performance of the bridge is between that of the cabled-stayed bridge and suspension bridge,is closer to that of the suspension bridge,is superior to that of the cable-stayed bridge and is applicable to the long span bridge having span length over 1 000 m.
To study the seismic performance of the combined cable-stayed and suspension bridge,aproposed bridge of the same kind with a main span of 1 400 m was taken as an example and was analyzed.The three-dimensional finite element model for the bridge was set up by the MIDAS Civil,the structural seismic responses of the bridge under the horizontal and vertical seismic action and the influence of the structural nonlinearity on the seismic responses were analyzed by the seismic response spectrum and the time-history analysis methods.Through comparison of the seismic responses of the bridge to those of a suspension bridge and a cable-stayed bridge having the same main spans,the adaptability that the bridge was to be used as the super long span bridge was studied.The results of the study show that under the horizontal seismic action,the greatest internal forces may occur in the main girder at the connections of the towers and girder and in the cross sections of the tower columns and tower footings of the bridge and therefore,special attention should be paid to the seismic design of these critical locations and cross sections.The seismic performance of the bridge is between that of the cabled-stayed bridge and suspension bridge,is closer to that of the suspension bridge,is superior to that of the cable-stayed bridge and is applicable to the long span bridge having span length over 1 000 m.
引文
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[2]Fumoto K,Murakoshi J,Hata K,et al.A Study on the Aerodynamic Characteristics of a New Type of Super Long Span Bridge[C]//Proceedings of IABSE Congress,Shanghai:2004.
[3]韩立中,张哲,张劲泉,等.大跨自锚式斜拉-悬索协作体系桥地震响应及减震控制分析研究[J].武汉理工大学学报(交通科学与工程版),2011,35(5):945-947.(HAN Li-zhong,ZHANG Zhe,ZHANG Jin-quan,et al.Analysis and Study of Seismic Response and Shock Absorption Control of Long Span Self-Anchored CableStayed and Suspension Bridge[J].Journal of Wuhan University of Technology(Transportation Science&Engineering),2011,35(5):945-947.in Chinese)
[4]刘春城,张哲.自锚式悬索桥的纵向地震反应研究[J].武汉理工大学学报(交通科学与工程版),2002,26(5):607-610.(LIU Chun-cheng,ZHANG Zhe.Study of Longitudinal Seismic Responses of Self-Anchored Suspension Bridges[J].Journal of Wuhan University of Technology(Transportation Science&Engineering),2002,26(5):607-610.in Chinese)
[5]黄海新.自锚式斜拉-悬吊协作体系桥动力响应研究(博士学位论文)[D].大连:大连理工大学,2007.(HUANG Hai-xin.A Study of Dynamic Response of Self-Anchored Cable-Stayed and Suspension Bridge(Doctorate Dissertation)[D].Dalian:Dalian University of Technology,2007.in Chinese)
[6]张凯.自锚式斜拉-悬吊桥地震反应分析(硕士学位论文)[D].大连:大连理工大学,2006.(ZHANG Kai.Seismic Response Analysis of Self-Anchored Cable-Stayed and Suspension Bridge(Master Dissertation)[D].Dalian:Dalian University of Technology,2006.in Chinese)
[7]文霁.斜拉-悬索体系桥力学特性研究(硕士学位论文)[D].成都:西南交通大学,2007.(WEN Qi.Study of Mechanical Characteristics of Combined Cable-Stayed and Suspension Bridges(Master Dissertation)[D].Chengdu:Southwest Jiaotong University,2007.in Chinese)
[8]孟续东.1 700米主跨斜拉-悬索协作体系桥梁方案设计和静动力计算分析研究(硕士学位论文)[D].成都:西南交通大学,2010.(MENG Xu-dong.Conceptual Design and Static and Dynamic Calculation,Analysis and Study of Combined Cable-Stayed and Suspension Bridge with a Main Span of 1 700 Meter(Master Dissertation)[D].Chengdu:Southwest Jiaotong University,2010.in Chinese)
[9]肖汝诚,贾丽君,薛二乐,等.斜拉-悬吊协作体系桥的设计探索[J].土木工程学报,2000,33(5):46-51.(XIAO Ru-Cheng,JIA Li-jun,XUE Er-le,et al.Research on the Design of Combined Cable-Stayed and Suspension Bridges[J].China Civil Engineering Journal,2000,33(5):46-51.in Chinese)
[10]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 of Highway Bridges[S].)
[2]Fumoto K,Murakoshi J,Hata K,et al.A Study on the Aerodynamic Characteristics of a New Type of Super Long Span Bridge[C]//Proceedings of IABSE Congress,Shanghai:2004.
[3]韩立中,张哲,张劲泉,等.大跨自锚式斜拉-悬索协作体系桥地震响应及减震控制分析研究[J].武汉理工大学学报(交通科学与工程版),2011,35(5):945-947.(HAN Li-zhong,ZHANG Zhe,ZHANG Jin-quan,et al.Analysis and Study of Seismic Response and Shock Absorption Control of Long Span Self-Anchored CableStayed and Suspension Bridge[J].Journal of Wuhan University of Technology(Transportation Science&Engineering),2011,35(5):945-947.in Chinese)
[4]刘春城,张哲.自锚式悬索桥的纵向地震反应研究[J].武汉理工大学学报(交通科学与工程版),2002,26(5):607-610.(LIU Chun-cheng,ZHANG Zhe.Study of Longitudinal Seismic Responses of Self-Anchored Suspension Bridges[J].Journal of Wuhan University of Technology(Transportation Science&Engineering),2002,26(5):607-610.in Chinese)
[5]黄海新.自锚式斜拉-悬吊协作体系桥动力响应研究(博士学位论文)[D].大连:大连理工大学,2007.(HUANG Hai-xin.A Study of Dynamic Response of Self-Anchored Cable-Stayed and Suspension Bridge(Doctorate Dissertation)[D].Dalian:Dalian University of Technology,2007.in Chinese)
[6]张凯.自锚式斜拉-悬吊桥地震反应分析(硕士学位论文)[D].大连:大连理工大学,2006.(ZHANG Kai.Seismic Response Analysis of Self-Anchored Cable-Stayed and Suspension Bridge(Master Dissertation)[D].Dalian:Dalian University of Technology,2006.in Chinese)
[7]文霁.斜拉-悬索体系桥力学特性研究(硕士学位论文)[D].成都:西南交通大学,2007.(WEN Qi.Study of Mechanical Characteristics of Combined Cable-Stayed and Suspension Bridges(Master Dissertation)[D].Chengdu:Southwest Jiaotong University,2007.in Chinese)
[8]孟续东.1 700米主跨斜拉-悬索协作体系桥梁方案设计和静动力计算分析研究(硕士学位论文)[D].成都:西南交通大学,2010.(MENG Xu-dong.Conceptual Design and Static and Dynamic Calculation,Analysis and Study of Combined Cable-Stayed and Suspension Bridge with a Main Span of 1 700 Meter(Master Dissertation)[D].Chengdu:Southwest Jiaotong University,2010.in Chinese)
[9]肖汝诚,贾丽君,薛二乐,等.斜拉-悬吊协作体系桥的设计探索[J].土木工程学报,2000,33(5):46-51.(XIAO Ru-Cheng,JIA Li-jun,XUE Er-le,et al.Research on the Design of Combined Cable-Stayed and Suspension Bridges[J].China Civil Engineering Journal,2000,33(5):46-51.in Chinese)
[10]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 of Highway Bridges[S].)
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