波形钢腹板连续刚构桥的地震响应分析
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摘要
为研究波形钢腹板连续刚构桥地震响应特性,分别对主跨160 m的PC及波形钢腹板连续刚构桥进行时程响应分析。采用MIDAS建立2种连续刚构桥模型,分析模型基本动力特性和在3种地震波作用下的地震响应。分析结果表明:波形钢腹板连续刚构桥振型贡献率无明显集中现象;地震波作用下,桥墩及主梁产生的轴力和绕横桥向弯矩较PC连续刚构桥大,绕顺桥向弯矩较PC连续刚构桥小;主梁跨中节点位移顺、横桥向均较PC连续刚构桥大;加速度衰减速度,顺桥向较PC连续刚构桥小,横桥向较PC连续刚构桥大;在主梁截面设计中,仍以静力计算结果控制。
To investigate the seismic response characteristic of corrugated steel web(CSW) continuous rigid-frame bridge,the time-history response analysis of prestressed concrete(PC) and CSW continuous rigid-frame bridges with main spans 160 m was respectively made.The MIDAS was used to set up the models for the two types of the bridges,the basic dynamic characteristics and the seismic responses of the models under the action of 3 types of seismic waves were analyzed.The results of the analysis reveal that the contribution ratio of vibration modes of the CSW bridge does not exhibit significant concentration.Under the action of the seismic waves,the axial forces produced in the piers and main girder of the CSW bridge and the bending moment around the transverse direction of the bridge are greater than those of the PC bridge,however,the bending moment around the longitudinal direction is less than that of the PC bridge.The displacement of the midspan node of the main girder of the CSW bridge in both the longitudinal and transverse directions is greater than that of the PC bridge.The decaying speed of acceleration of the CSW bridge in the longitudinal direction is less than that of the PC bridge while in the transverse direction,is greater than that of the PC bridge.In the design of the cross section of the main girder,the results of static calculation should be still taken as the control.
To investigate the seismic response characteristic of corrugated steel web(CSW) continuous rigid-frame bridge,the time-history response analysis of prestressed concrete(PC) and CSW continuous rigid-frame bridges with main spans 160 m was respectively made.The MIDAS was used to set up the models for the two types of the bridges,the basic dynamic characteristics and the seismic responses of the models under the action of 3 types of seismic waves were analyzed.The results of the analysis reveal that the contribution ratio of vibration modes of the CSW bridge does not exhibit significant concentration.Under the action of the seismic waves,the axial forces produced in the piers and main girder of the CSW bridge and the bending moment around the transverse direction of the bridge are greater than those of the PC bridge,however,the bending moment around the longitudinal direction is less than that of the PC bridge.The displacement of the midspan node of the main girder of the CSW bridge in both the longitudinal and transverse directions is greater than that of the PC bridge.The decaying speed of acceleration of the CSW bridge in the longitudinal direction is less than that of the PC bridge while in the transverse direction,is greater than that of the PC bridge.In the design of the cross section of the main girder,the results of static calculation should be still taken as the control.
引文
[1]万水.波形钢腹板PC组合箱梁桥设计与施工[C]//波形钢腹板PC组合结构桥梁技术研讨会.成都:2010.(WAN Shui.Design and Construction of Corrugated SteelWeb and PC Composite Box Girder Bridges[C]//Workshopon Techniques of Corrugated Steel Web and PC CompositeStructure Bridges.Chengdu:2010.in Chinese)
[2]日本高速道路技术中心.日本波型钢腹板桥设计.施工指南[M].日本:2004.(Center of Japan Expressway Technology.Guideline for De-sign and Construction of Corrugated Steel Web Bridges in Ja-pan[M].Japan:2004.in Japanese)
[3]陈礼榕.大跨矮墩连续刚构地震响应分析[J].四川建筑,2010,(3):122-123.(CHEN Li-rong.Analysis of Seismic Response of Long Spanand Low Pier Continuous Rigid-Frame Bridges[J].SichuanArchitecture,2010,(3):122-123.in Chinese)
[4]尹海军,李子青,郭琦,等.大跨高墩连续刚构桥动力特性研究[J].西安建筑科技大学学报(自然科学版),2010,(5):663-668.(YI N Hai-jun,LI Zi-qing,GUO Qi,et al.Study on the Dy-namic Characteristics of Long Span Continuous Rigid FrameBridge with High Wall Piers[J].Journal of Xi′an University ofArchitecture&Technology(Natural Science Edition),2010,(5):663-668.in Chinese)
[5]刘怀林,郑罡.大跨径连续刚构桥抗震分析及抗震性能评价[J].公路交通技术,2009,(6):81-84.(LI U Huai-lin,ZHENG Gang.Seismic Analysis and SeismicPerformance Evaluation for Large-Span Continuous RigidFrame Bridges[J].Technology of Highway and Transport,2009,(6):81-84.in Chinese)
[6]吴祖根,赵澎涌,沈兴谊.部分波形钢腹板PC连续梁桥的设计实践[J].世界桥梁,2008,(4):19-25.(WU Zu-gen,ZHAO Peng-yong,SHEN Xing-yi.DesignPractice of a Prestressed Concrete Continuous Girder Bridgewith Partial Corrugated Steel Webs[J].World Bridges,2008,(4):19-25.in Chinese)
[7]王朝,陈华利,万水.某波形钢腹板PC组合箱梁高架桥的抗震分析[J].山西建筑,2009,(29):291-292.(WANG Chao,CHEN Hua-li,WAN Shui.Analysis on theAnti-Seismic Performance of the Prestressed Composite Box-Girder Viaduct with Corrugated Steel Webs[J].Shanxi Archi-tecture,2009,(29):291-292.in Chinese)
[8]JTG D62-2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].(JTG D62-2004,Code for Design of Highway Reinforced Con-crete and Prestressed Concrete Bridges and Culverts[S].)
[9]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 High-way Bridges[S].)
[2]日本高速道路技术中心.日本波型钢腹板桥设计.施工指南[M].日本:2004.(Center of Japan Expressway Technology.Guideline for De-sign and Construction of Corrugated Steel Web Bridges in Ja-pan[M].Japan:2004.in Japanese)
[3]陈礼榕.大跨矮墩连续刚构地震响应分析[J].四川建筑,2010,(3):122-123.(CHEN Li-rong.Analysis of Seismic Response of Long Spanand Low Pier Continuous Rigid-Frame Bridges[J].SichuanArchitecture,2010,(3):122-123.in Chinese)
[4]尹海军,李子青,郭琦,等.大跨高墩连续刚构桥动力特性研究[J].西安建筑科技大学学报(自然科学版),2010,(5):663-668.(YI N Hai-jun,LI Zi-qing,GUO Qi,et al.Study on the Dy-namic Characteristics of Long Span Continuous Rigid FrameBridge with High Wall Piers[J].Journal of Xi′an University ofArchitecture&Technology(Natural Science Edition),2010,(5):663-668.in Chinese)
[5]刘怀林,郑罡.大跨径连续刚构桥抗震分析及抗震性能评价[J].公路交通技术,2009,(6):81-84.(LI U Huai-lin,ZHENG Gang.Seismic Analysis and SeismicPerformance Evaluation for Large-Span Continuous RigidFrame Bridges[J].Technology of Highway and Transport,2009,(6):81-84.in Chinese)
[6]吴祖根,赵澎涌,沈兴谊.部分波形钢腹板PC连续梁桥的设计实践[J].世界桥梁,2008,(4):19-25.(WU Zu-gen,ZHAO Peng-yong,SHEN Xing-yi.DesignPractice of a Prestressed Concrete Continuous Girder Bridgewith Partial Corrugated Steel Webs[J].World Bridges,2008,(4):19-25.in Chinese)
[7]王朝,陈华利,万水.某波形钢腹板PC组合箱梁高架桥的抗震分析[J].山西建筑,2009,(29):291-292.(WANG Chao,CHEN Hua-li,WAN Shui.Analysis on theAnti-Seismic Performance of the Prestressed Composite Box-Girder Viaduct with Corrugated Steel Webs[J].Shanxi Archi-tecture,2009,(29):291-292.in Chinese)
[8]JTG D62-2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].(JTG D62-2004,Code for Design of Highway Reinforced Con-crete and Prestressed Concrete Bridges and Culverts[S].)
[9]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 High-way Bridges[S].)
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