基于振动台试验的曲线桥梁抗震性能研究
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摘要
为了研究S形曲线梁桥在地震作用下的动力响应及抗震性能,设计并制作一座相似比为1/20的S形曲线梁桥进行振动台试验研究。结果表明:在地震作用下,S形曲线梁桥的梁体未有明显损伤,桥墩出现裂缝,支座破坏严重;在墩底屈服之前,墩梁已发生较大相对位移,桥梁极易发生落梁破坏现象;桥墩在大震作用下的扭转耗能作用十分明显。在振动台试验基础上,对S形曲线梁桥提出一种"梁体漂浮抗震设计"的概念设计方法,为该类桥梁的抗震设计理论提供支持。
In order to study the dynamic response and the seismic performance of the S-shaped curve bridge,a 1/20 scale model of S-shaped curve bridge was designed and fabricated for shaking table test.Test results show that,during the earthquake,the beam of S-shaped curved bridge had no significant damage.However,some cracks appear in the piers,and the bearings was damaged seriously.Before the pier yield period,pier and beam has a larger relative displacement.The phenomenon of beam falling occurs easily andthe piers under earthquake reverses twist energy very obvious.On the basis of shaking table test,a conceptual design which called"beam floating seismic design"was proposed to make a foundation for this kind of bridge seismic design theory.
In order to study the dynamic response and the seismic performance of the S-shaped curve bridge,a 1/20 scale model of S-shaped curve bridge was designed and fabricated for shaking table test.Test results show that,during the earthquake,the beam of S-shaped curved bridge had no significant damage.However,some cracks appear in the piers,and the bearings was damaged seriously.Before the pier yield period,pier and beam has a larger relative displacement.The phenomenon of beam falling occurs easily andthe piers under earthquake reverses twist energy very obvious.On the basis of shaking table test,a conceptual design which called"beam floating seismic design"was proposed to make a foundation for this kind of bridge seismic design theory.
引文
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[8]韩强,杜修力,刘晶波,等.多维地震作用下隔震桥梁地震反应(I)——模型结构振动台试验[J].振动与冲击,2008,27(9):60-65.Han Qiang,Du Xiuli,Liu Jingbo,et al.Seismic response of isolated bridges with lrb under muldi-directional earthquake-patt(I)shaking table test of bridge model—part(I)shaking table test of bridge model[J].Vibration and Shock,2008,27(9):60-65.(in Chinese)
[9]王蕾.大跨度刚构桥地震响应分析及振动台试验研究[D].北京:北京交通大学,2010.Wang Lei.Span Rigid Frame Bridge Seismic Response Analysis and Shaking Table Test Research[D].Beijing:Beijing Jiaotong University,2010.(in Chinese)
[10]周颖,吕西林.建筑结构振动台模型试验方法与技术[M].北京:中国科学出版社,2012.Zhou Ying,Lv Xilin.Building Structures Shaking Table Test Methods and Techniques[M].Beijing:China Science Press,2012.(in Chinese)
[11]周颖,卢文胜,吕西林.模拟地震振动台模型实用设计方法[J].结构工程师,2003(3):30-33.Zhou Ying,Lu Wensheng,LüXilin.Practical model design method of shaking table tests[J].Structural Engineers,2003(3):30-33.(in Chinese)
[12]张春雷.地震动输入对大跨度桥梁抗震影响的振动台试验研究[D].重庆:重庆交通大学,2009.Zhang Chunlei.Experimental Study on Seismic Shaking Table Input Large-Span Bridges on the Impact of Ground Motion[D].Chongqing:Chongqing Jiaotong University,2009.(in Chinese)
[2]Abdel-Salam M N,Heins C P.Seismic response of curved steel box girder bridges[J].ASCE,Journal of Structural Engineering,1988,114(12):2790-2811.
[3]叶爱君,袁万城,胡世德.高墩振动台试验研究[J].同济大学学报:自然科学版,1996,24(6):606-612.Ye Aijun,Yuan Wancheng,Hu Shide.High pier shaking table test study[J].Journal of Tongji University:Natural Science,1996,24(6):606-612.(in Chinese)
[4]张俊平,周福霖,廖蜀樵.桥梁隔震体系振动台试验研究(III)—测试结果分析[J].地震工程与工程振动,2002,22(2):136-142.Zhang Junping,Zhou Fulin,Liao Shuqiao.Shaking table test of Bridge isolation system(III)—an analysis of measured results[J].Earthquake Engineering and Engineering Vibration,2002,22(2):136-142.(in Chinese)
[5]李忠献,张勇,岳福青.地震作用下隔震简支梁桥碰撞反应的振动台试验[J].地震工程与工程振动,2007,27(2):152-157.Li Zhongxian,Zhang Yong,Yue Fuqing.Shaking table test on pounding responses of simply supported Isolated bridge sunder earthquake excitation[J].Earthquake Engineering and Engineering Vibration,2007,27(2):152-157.(in Chinese)
[6]钟栋青,王曙光,刘伟庆.大跨连续梁桥振动台试验与有限元模型对比分析[J].工程抗震与加固改造,2014,36(1):33-39.Zhong Dongqing,Wang Shuguang,Liu Weiqing.Contrastive analysis of shaking table test and finite element model on the long-span continuous-beam bridges[J].Earthquake Resistant Engineering and Retrofitting,2014,36(1):33-39.(in Chinese)
[7]李勇.非一致激励下高架连续梁桥地震响应参数影响分析[D].北京:北京工业大学,2008.Li Yong.Non-Uniform Excitation Elevated Continuous Beam Bridge Seismic Response Parameters Impact Analysis[D].Beijing:Beijing University of Technology,2008.(in Chinese)
[8]韩强,杜修力,刘晶波,等.多维地震作用下隔震桥梁地震反应(I)——模型结构振动台试验[J].振动与冲击,2008,27(9):60-65.Han Qiang,Du Xiuli,Liu Jingbo,et al.Seismic response of isolated bridges with lrb under muldi-directional earthquake-patt(I)shaking table test of bridge model—part(I)shaking table test of bridge model[J].Vibration and Shock,2008,27(9):60-65.(in Chinese)
[9]王蕾.大跨度刚构桥地震响应分析及振动台试验研究[D].北京:北京交通大学,2010.Wang Lei.Span Rigid Frame Bridge Seismic Response Analysis and Shaking Table Test Research[D].Beijing:Beijing Jiaotong University,2010.(in Chinese)
[10]周颖,吕西林.建筑结构振动台模型试验方法与技术[M].北京:中国科学出版社,2012.Zhou Ying,Lv Xilin.Building Structures Shaking Table Test Methods and Techniques[M].Beijing:China Science Press,2012.(in Chinese)
[11]周颖,卢文胜,吕西林.模拟地震振动台模型实用设计方法[J].结构工程师,2003(3):30-33.Zhou Ying,Lu Wensheng,LüXilin.Practical model design method of shaking table tests[J].Structural Engineers,2003(3):30-33.(in Chinese)
[12]张春雷.地震动输入对大跨度桥梁抗震影响的振动台试验研究[D].重庆:重庆交通大学,2009.Zhang Chunlei.Experimental Study on Seismic Shaking Table Input Large-Span Bridges on the Impact of Ground Motion[D].Chongqing:Chongqing Jiaotong University,2009.(in Chinese)
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