超大跨斜拉桥顺桥向地震损伤分析与控制
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摘要
以一座试设计的主跨1 400m的斜拉桥为例,采用弹塑性方法并引入地震损伤指标分析了不同强度地震作用下飘浮体系和弹性约束体系的地震损伤与破坏模式;研究了极端地震作用下损伤控制策略对斜拉桥损伤控制效果的影响。结果表明:极端地震作用下,主塔和桥墩分别遭受局部失效和严重损伤,发生了典型的弯曲单塑性破坏;基于Park损伤指数的附加耗能阻尼器的损伤控制策略可显著控制主塔、桥墩地震损伤和主梁位移,满足损伤控制目标要求,改善了桥梁的整体抗震性能。
Elasto-plastic analysis method was carried out to investigate the seismic damage and failure modes of a trial designed cable-stayed bridge with a main span of 1 400 mincluding floating system and elastic restrained system under various ground motion intensities.The influences of damage control strategies on damage control effect of cable-stayed bridges were presented.The results show that the pylons and piers suffer from local failure and severe damage under extreme earthquake respectively,which are subjected to a typical failure mode with one plastic hinge.The damage control strategies with additional dampers have obvious effects on controlling seismic damage of the pylons and piers,which can effectively reduce the girder displacement in the longitudinal direction.Therefore,it is effective to improve the seismic performance of a trial designed cable-stayed bridge so that its seismic performance can meet damage control targets with additional dampers based on the Park damage index.
Elasto-plastic analysis method was carried out to investigate the seismic damage and failure modes of a trial designed cable-stayed bridge with a main span of 1 400 mincluding floating system and elastic restrained system under various ground motion intensities.The influences of damage control strategies on damage control effect of cable-stayed bridges were presented.The results show that the pylons and piers suffer from local failure and severe damage under extreme earthquake respectively,which are subjected to a typical failure mode with one plastic hinge.The damage control strategies with additional dampers have obvious effects on controlling seismic damage of the pylons and piers,which can effectively reduce the girder displacement in the longitudinal direction.Therefore,it is effective to improve the seismic performance of a trial designed cable-stayed bridge so that its seismic performance can meet damage control targets with additional dampers based on the Park damage index.
引文
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[16]李立峰,刘本永,张晨熙,等.中等跨径斜拉桥塔梁弹性约束装置的减震效应研究[J].地震工程与工程振动,2013,33(1):146-152.LI Li-feng,LIU Ben-yong,ZHANG Chen-xi,et al.Research on the Seismic Performance of Mid-span Cable-stayed Bridges with Elastic Constraints Between Tower and Beam[J].Journal of Earthquake Engineering and Engineering Vibration,2013,33(1):146-152.
[17]周士金,刘荣桂,蔡东升,等.CFRP索大跨斜拉桥的非线性地震响应控制分析[J].中国公路学报,2011,24(3):64-71.ZHOU Shi-jin,LIU Rong-gui,CAI Dong-sheng,et al.Nonlinear Seismic Response Control Analysis of Long-span Cable-stayed Bridge with CFRP Cables[J].China Journal of Highway and Transport,2011,24(3):64-71.
[18]叶爱君,范立础.超大跨度斜拉桥的横向约束体系[J].中国公路学报,2007,20(2):63-67.YE Ai-jun,FAN Li-chu.Lateral Constraint Systems for Super-long-span Cable-stayed Bridge[J].China Journal of Highway and Transport,2007,20(2):63-67.
[19]徐利平,郭龙,魏斌.大跨径斜拉桥顺桥向约束体系与应用[J].结构工程师,2011,27(6):71-77.XU Li-ping,GUO Long,WEI Bin.Longitudinal Boundary System and Application in Long Span Cable-stayed Bridges[J].Structural Engineers,2011,27(6):71-77.
[20]PARK Y J,ANG A H S.Mechanistic Seismic Damage Model for Reinforced Concrete[J].Journal of Structural Engineering,1985,111(4):722-739.
[21]KUNNATH S K,REINHORN A M,LOBO R F.IDARC Version 3.0:A Program for the Inelastic Damage Analysis of RC Structures[R].Buffalo:State University of New York,1992.
[22]PARK Y J,ANG A H S,WEN Y K.Damage-limiting Aseismic Design of Buildings[J].Earthquake Spectra,1987,3(1):1-26.
[23]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].
[24]孙斌.超千米级斜拉桥结构体系研究[D].上海:同济大学,2008.SUN Bin.Study of Structural Systems for Cablestayed Bridge with Ultra Kilometer Span[D].Shanghai:Tongji University,2008.
[25]谢文.考虑地震损伤控制的超大跨斜拉桥结构体系研究[D].上海:同济大学,2013.XIE Wen.Study on Structural System with Seismic Damage Control for Super Long-span Cable-stayed Bridge[D].Shanghai:Tongji University,2013.
[2]ZAYATI F,MAHIN S A,MOEHLE J P.Experimental and Analytical Evaluation of a Retrofit Doubledeck Viaduct Structure[R].Berkeley:University of California,1996.
[3]孙利民,秦东,范立础.扩展散体单元法在钢筋混凝土桥梁倒塌分析中的应用[J].土木工程学报,2002,35(6):53-58.SUN Li-min,QIN Dong,FAN Li-chu.A New Model for Collapse Analysis of Reinforced Concrete Bridge[J].China Civil Engineering Journal,2002,35(6):53-58.
[4]KUNNATH S K,GROSS J L.Inelastic Response of the Cypress Viaduct to the Loma Prieta Earthquake[J].Engineering Structures,1995,17(7):485-493.
[5]周智杰.集鹿大桥震害评估与修复之研究[D].台北:台湾大学,2004.ZHOU Zhi-jie.Study of Evaluation and Retrofitted for Seismic Damage of Chi-Lu Cable-stayed Bridge[D].Taipei:Taiwan University,2004.
[6]刘金龙.地震作用下多塔斜拉桥失效模式控制研究[D].哈尔滨:哈尔滨工业大学,2009.LIU Jin-long.Study of Control for Seismic Damage Modes of Cable-stayed Bridge with Multi-tower[D].Harbin:Harbin Institute of Technology,2009.
[7]聂利英,张雷,李硕娇.地震作用下大跨度悬索桥纵向破坏模式研究[J].土木工程学报,2011,44(4):91-97.NIE Li-ying,ZHANG Lei,LI Shuo-jiao.Study of the Longitudinal Failure Pattern of Long Span Suspension Bridges Under Earthquake[J].China Civil Engineering Journal,2011,44(4):91-97.
[8]汤虎,李建中.板式橡胶支座桥梁地震位移控制方法[J].中国公路学报,2013,26(3):110-116.TANG Hu,LI Jian-zhong.Displacement Control Method for Continuous Bridges on Laminated Rubber Bearings Under Earthquake Excitation[J].China Journal of Highway and Transport,2013,26(3):110-116.
[9]魏标,崔睿博,戴公连,等.橡胶支座对非规则连续梁桥地震反应的影响[J].中国公路学报,2013,26(6):110-117.WEI Biao,CUI Rui-bo,DAI Gong-lian,et al.Impact of Laminated Rubber Bearings on Seismic Response of Irregular Continuous Bridges[J].China Journal of Highway and Transport,2013,26(6):110-117.
[10]陈永祁,马良喆.苏通长江大桥限位阻尼器的设计和测试[J].现代交通技术,2008,5(4):20-24.CHEN Yong-qi,MA Liang-zhe.Design and Evaluation of Limited Displacement Damper of Sutong Yangtze River Bridge[J].Modern Transportation Technology,2008,5(4):20-24.
[11]焦常科,李爱群.非弹性连接对三塔悬索桥地震响应的影响[J].中国公路学报,2013,26(1):98-105JIAO Chang-ke,LI Ai-qun.Influence of Inelastic Connection on Seismic Response of Triple-tower Suspension Bridge[J].China Journal of Highway and Transport,2013,26(1):98-105.
[12]叶爱君,范立础.附加阻尼器对超大跨度斜拉桥的减震效果[J].同济大学学报:自然科学版,2006,34(7):859-863.YE Ai-jun,FAN Li-chu.Seismic Response Reduction of a Super-long-span Cable-stayed Bridge by Adding Dampers[J].Journal of Tongji Universty:Natural Science,2006,34(7):859-863.
[13]GUAN Z,LI J,XU Y.Performance Test of Energy Dissipation Bearing and Its Application in Seismic Control of a Long-span Bridge[J].Journal of Bridge Engineering,2010,15(6):622-630.
[14]李勇,闫维明,陈彦江,等.大跨斜拉桥的近断层地震响应及减震控制[J].防灾减灾工程学报,2010,30(5):479-486.LI Yong,YAN Wei-ming,CHEN Yan-jiang,et al.Seismic Response Analysis and Control of Long-span Cable-stayed Bridges Under Near-fault Earthquakes[J].Journal of Disaster Prevention and Mitigation Engineering,2010,30(5):479-486.
[15]梁鹏,吴向男,李万恒,等.三塔悬索桥纵向约束体系优化[J].中国公路学报,2011,24(1):59-67.LIANG Peng,WU Xiang-nan,LI Wan-heng,et al.Longitudinal Constraint System Optimization for Three-tower Suspension Bridge[J].China Journal of Highway and Transport,2011,24(1):59-67.
[16]李立峰,刘本永,张晨熙,等.中等跨径斜拉桥塔梁弹性约束装置的减震效应研究[J].地震工程与工程振动,2013,33(1):146-152.LI Li-feng,LIU Ben-yong,ZHANG Chen-xi,et al.Research on the Seismic Performance of Mid-span Cable-stayed Bridges with Elastic Constraints Between Tower and Beam[J].Journal of Earthquake Engineering and Engineering Vibration,2013,33(1):146-152.
[17]周士金,刘荣桂,蔡东升,等.CFRP索大跨斜拉桥的非线性地震响应控制分析[J].中国公路学报,2011,24(3):64-71.ZHOU Shi-jin,LIU Rong-gui,CAI Dong-sheng,et al.Nonlinear Seismic Response Control Analysis of Long-span Cable-stayed Bridge with CFRP Cables[J].China Journal of Highway and Transport,2011,24(3):64-71.
[18]叶爱君,范立础.超大跨度斜拉桥的横向约束体系[J].中国公路学报,2007,20(2):63-67.YE Ai-jun,FAN Li-chu.Lateral Constraint Systems for Super-long-span Cable-stayed Bridge[J].China Journal of Highway and Transport,2007,20(2):63-67.
[19]徐利平,郭龙,魏斌.大跨径斜拉桥顺桥向约束体系与应用[J].结构工程师,2011,27(6):71-77.XU Li-ping,GUO Long,WEI Bin.Longitudinal Boundary System and Application in Long Span Cable-stayed Bridges[J].Structural Engineers,2011,27(6):71-77.
[20]PARK Y J,ANG A H S.Mechanistic Seismic Damage Model for Reinforced Concrete[J].Journal of Structural Engineering,1985,111(4):722-739.
[21]KUNNATH S K,REINHORN A M,LOBO R F.IDARC Version 3.0:A Program for the Inelastic Damage Analysis of RC Structures[R].Buffalo:State University of New York,1992.
[22]PARK Y J,ANG A H S,WEN Y K.Damage-limiting Aseismic Design of Buildings[J].Earthquake Spectra,1987,3(1):1-26.
[23]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].
[24]孙斌.超千米级斜拉桥结构体系研究[D].上海:同济大学,2008.SUN Bin.Study of Structural Systems for Cablestayed Bridge with Ultra Kilometer Span[D].Shanghai:Tongji University,2008.
[25]谢文.考虑地震损伤控制的超大跨斜拉桥结构体系研究[D].上海:同济大学,2013.XIE Wen.Study on Structural System with Seismic Damage Control for Super Long-span Cable-stayed Bridge[D].Shanghai:Tongji University,2013.
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