双柱式简支-桥面连续梁桥横向地震碰撞和防撞措施分析
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摘要
地震作用下,结构的碰撞问题是影响结构地震反应和抗震性能的一个重要因素。本文针对简支-桥面连续梁桥在横桥向地震作用下主梁与抗震挡块间的碰撞行为,建立了考虑支座非线性、墩柱弹塑性以及桩土相互作用的碰撞模型。在此基础上分析了主梁与抗震挡块间的碰撞效应,探讨了减轻碰撞的措施和方法,并比较了两种措施的防撞效果。结果表明:主梁与抗震挡块间的碰撞不仅产生巨大的碰撞力,还会增大桥墩的地震需求,对结构抗震不利;在抗震挡块内侧安装橡胶缓冲垫和采用铅芯橡胶支座均能减小碰撞力、墩顶底的剪力和塑性转角,但后者的防撞效果更好。
The pounding between components of a structure has significant influences on the structural performance under earthquake.Aiming at the transverse pounding of Simply supported-continuous bridge under transverse earthquake,a pounding model of considering the bearing nonlinear、pier columns elastoplastic and soil-foundation interaction is established.On this basis,the effect of the collision between the main beam and the retainer is analyzed,the collision mitigation measures are investigated,and the effect of the collision between two measures is compared.The results indicate that pounding can lead to strong pounding force and amplify the responses of piers.Installed bump rubber inside the retainer and used the LRB could both reduce the impact force,the shear force and the plastic rotation angles at the top and bottom of piers,but the second can recive better effect.
The pounding between components of a structure has significant influences on the structural performance under earthquake.Aiming at the transverse pounding of Simply supported-continuous bridge under transverse earthquake,a pounding model of considering the bearing nonlinear、pier columns elastoplastic and soil-foundation interaction is established.On this basis,the effect of the collision between the main beam and the retainer is analyzed,the collision mitigation measures are investigated,and the effect of the collision between two measures is compared.The results indicate that pounding can lead to strong pounding force and amplify the responses of piers.Installed bump rubber inside the retainer and used the LRB could both reduce the impact force,the shear force and the plastic rotation angles at the top and bottom of piers,but the second can recive better effect.
引文
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[7]郭安薪,李惠,李忠军,赵清杰.高架桥梁的地震碰撞和落梁分析及其控制[J].防灾减灾工程学报,2010,30(增刊):172～176Guo An-xin,Li Hui,Li Zhong-jun,Zhao Qing-jie.Elevated Bridge Seismic Collision and Fall BeamAnalysis and Control[J].Journal of Disaster Preventionand Mitigation Engineering,2010,30(S):172～176(inChinese)
[8]王军文,李建中,范立础.非规则桥梁横向地震碰撞反应分析[J].振动与冲击,2010,29(6):25～30Wang Jun-wen,Li Jian-zhong,Fan Li-chu.Analysis of Pounding on Seismic Responses of Irregular Girder Bridges under Transverse Earthquake[J].Journal of Vibration and Shock,2010,29(6):25～30(in Chinese)[9]Jankowski R.Non-linear Viscoelastic Modeling of Earthquake-induced Structural Pounding[J].Earthquake Engineering and Structural Dynamics,2005,34(6):595～611
[10]Anagnostopoulos S A.Pounding of Buldings in Series during Earthquakes[J].Earthquake Engineering and Structural Dynamics,1998,16(3):443～456
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12 Gao Yu-feng.The Nonlinear Seismic Response Characteristics of Bridge Considering Pounding Effects[J].Chengdu:Southwest Jiaotong University,2010,12(in Chinese)
[12]Kazuhiko KAWASHIMA,Gaku SHOJI.Effect of Restrainers to Mitigate Pounding between Adjacent Decks Subjected to Astrong Ground motion[C].Paper NO.1435,12WCEE,Auckland:IAEE,2000
[13]邱顺冬.桥梁工程软件Midas Civil常见问题[M].北京:人民交通出版社Qiu Shun-dong.Frequently Asked Questions on Midas Civil the Software Solution in Bridge Engineering[M].Beijing:China Communications Press,2009(in Chinese)
[2]Hall John F.Northridge Earthquake of January 17,1994 Reconnaissance Report[J].Earthquake Spectra,1995,11:1～514
[3]Otsuka H,Unjoh S,Terayama T,Hoshikuma J,KosaK.Damage to Highway Bridges by 1995 HyogokenNanbu Earthquake and the Retrofit of Hightway Bridgesin Japan[A].3rd U.S.Japan Workshop on SeismicRetrofit of Bridges[C],1996
[4]邓育林,彭凯,李建中.地震作用下横向碰撞对连续梁桥地震反应的影响[J].结构工程师,2007,23(2):64～68Deng Yu-lin,Peng kai,Li Jian-zhong.Effect ofPounding on Seismic Responses of Continupus GirderBridges under Transverse Earthquake[J].StructuralEngineers,2007,23(2):64～68(in Chinese)
[5]聂利英,李建中,范立础.地震作用下结构碰撞的模型参数及其影响分析[J].工程力学,2005,22(5):142～147Nie Li-ying,Li Jian-zhong,Fan Li-chu.Selection ofPounding Analysis Parameters And Its Effects onStructure Under Earthquake[J].EngineeringMechanics,2005,22(5):142～147(in Chinese)
[6]聂利英,范立础.地震作用下城市立交抗震挡防撞措施分析[J].中国公路学报,2006,19(3):49～52Nie Li-ying,Fan Li-chu.Analysis of CrashworthyMeasure of Reinforced Concrete Block on Anti-seismicUrban Interchange Bridge under Earthquake[J].ChinaJurnal of Highway and Transport,2006,19(3):49～52(in Chinese)
[7]郭安薪,李惠,李忠军,赵清杰.高架桥梁的地震碰撞和落梁分析及其控制[J].防灾减灾工程学报,2010,30(增刊):172～176Guo An-xin,Li Hui,Li Zhong-jun,Zhao Qing-jie.Elevated Bridge Seismic Collision and Fall BeamAnalysis and Control[J].Journal of Disaster Preventionand Mitigation Engineering,2010,30(S):172～176(inChinese)
[8]王军文,李建中,范立础.非规则桥梁横向地震碰撞反应分析[J].振动与冲击,2010,29(6):25～30Wang Jun-wen,Li Jian-zhong,Fan Li-chu.Analysis of Pounding on Seismic Responses of Irregular Girder Bridges under Transverse Earthquake[J].Journal of Vibration and Shock,2010,29(6):25～30(in Chinese)[9]Jankowski R.Non-linear Viscoelastic Modeling of Earthquake-induced Structural Pounding[J].Earthquake Engineering and Structural Dynamics,2005,34(6):595～611
[10]Anagnostopoulos S A.Pounding of Buldings in Series during Earthquakes[J].Earthquake Engineering and Structural Dynamics,1998,16(3):443～456
[11]高玉峰.考虑碰撞效应的桥梁非线性地震反应特性研究[D].成都:西南交通大学博士学位论文,2010,
12 Gao Yu-feng.The Nonlinear Seismic Response Characteristics of Bridge Considering Pounding Effects[J].Chengdu:Southwest Jiaotong University,2010,12(in Chinese)
[12]Kazuhiko KAWASHIMA,Gaku SHOJI.Effect of Restrainers to Mitigate Pounding between Adjacent Decks Subjected to Astrong Ground motion[C].Paper NO.1435,12WCEE,Auckland:IAEE,2000
[13]邱顺冬.桥梁工程软件Midas Civil常见问题[M].北京:人民交通出版社Qiu Shun-dong.Frequently Asked Questions on Midas Civil the Software Solution in Bridge Engineering[M].Beijing:China Communications Press,2009(in Chinese)
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