厦漳跨海大桥北汊主桥振动台试验研究
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摘要
为了研究阻尼器和不同地震激励方式对厦漳跨海大桥北汊主桥抗震性能的影响,以及为计算分析提供依据,设计制作了1∶50的有机玻璃全桥模型,利用地震台阵对模型桥进行了白噪声激励和模拟地震试验,分析模型的动力特性及一致激励、行波效应以及带阻尼器时的地震响应。试验结果表明:试验模型模态测试结果和计算结果吻合较好;在顺桥向地震作用下,阻尼器减震效果明显;纵向行波效应对大桥影响较大,横向行波效应对大桥影响很小;大桥桥塔各向地震响应是解耦的。因此,可以选择适宜的阻尼器,以提高大桥的抗震性能;可以采用纵向+竖向和横向+竖向2种地震输入方式进行大桥的抗震分析。
To study the influences of the dampers and different seismic excitation ways on the seismic performance of the north main bridge of the Xiazhang Sea-Crossing Bridge and to provide the basis for the calculation and analysis,an organic glass model in scale of 1∶ 50 for the whole bridge of the bridge was designed and fabricated. The seismologic array was used to carry out the white noise excitation and earthquake simulation tests for the model bridge. The dynamic characteristics of the model and the seismic responses of the model with dampers under the uniform excitation and traveling wave effect excitation were analyzed. The results of the tests and analysis show that the tests of the model modes are agreeable with the calculations. Under the action of the earthquake in the longitudinal direction of the bridge,the seismic mitigation effect of the dampers is notable. The influence of the longitudinal traveling wave effect on the bridge is great while that of the transverse traveling wave effect is quite little. The seismic responses of the pylons of the bridge in all directions are decoupling and therefore the appropriate dampers may be chosen to improve the seismic performance of the bridge and the two ways of the longitudinal + vertical and the transverse + vertical seismic input can be used to carry out the seismic analysis of the bridge.
To study the influences of the dampers and different seismic excitation ways on the seismic performance of the north main bridge of the Xiazhang Sea-Crossing Bridge and to provide the basis for the calculation and analysis,an organic glass model in scale of 1∶ 50 for the whole bridge of the bridge was designed and fabricated. The seismologic array was used to carry out the white noise excitation and earthquake simulation tests for the model bridge. The dynamic characteristics of the model and the seismic responses of the model with dampers under the uniform excitation and traveling wave effect excitation were analyzed. The results of the tests and analysis show that the tests of the model modes are agreeable with the calculations. Under the action of the earthquake in the longitudinal direction of the bridge,the seismic mitigation effect of the dampers is notable. The influence of the longitudinal traveling wave effect on the bridge is great while that of the transverse traveling wave effect is quite little. The seismic responses of the pylons of the bridge in all directions are decoupling and therefore the appropriate dampers may be chosen to improve the seismic performance of the bridge and the two ways of the longitudinal + vertical and the transverse + vertical seismic input can be used to carry out the seismic analysis of the bridge.
引文
[1]唐光武,黄福伟,郑罡.厦漳跨海大桥主桥初步设计阶段抗震分析研究报告[R].重庆:招商局重庆交通科研设计院有限公司,2008.(TANG Guang-wu,HUANG Fu-wei,ZHENG Gang.Re-port of Seismic Analysis and Study of Main Bridges of Xi-azhang Sea-Crossing Bridge at Preliminary Design Stage[R].Chongqing:China Merchants Chongqing Transport Research&Design Institute Co.,Ltd.,2008.in Chinese)
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[3]唐光武,郑万山,郑罡,等.重庆朝天门长江大桥动力模型试验研究[J].公路,2009,(5):146-151.(TANG Guang-wu,ZHENG Wan-shan,ZHENG Gang,et al.Dynamic Model Test Study of Chongqing Chaotian-men Yangtze River Bridge[J].Highway,2009,(5):146-151.in Chinese)
[4]高文军,牛松山,兰海燕.单索面独塔斜拉桥振动台模型试验研究[J].公路交通技术,2010,(2):45-48.(GAO Wen-jun,NIU Song-shan,LAN Hai-yan.Shaking Table Model Test Study of a Cable-Stayed Bridge with a Single Cable Plane and Single Tower[J].Technology of Highway and Transport,2010,(2):45-48.in Chi-nese)
[5]王曙光,刘伟庆,徐秀丽,等.大跨连续梁桥纵向消能减震振动台模型试验[J].中国公路学报,2009,(5):54-59.(WANG Shu-guang,LIU Wei-qing,XU Xiu-li,et al.Shaking Table Model Test of Longitudinal Seismic Energy Dissipation and Seismic Mitigation for Long-Span Continu-ous Girder Bridge[J].China Journal of Highway and Transport,2009,(5):54-59.in Chinese)
[6]李勇,任晓强,闫维明,等.三跨飞燕式异型钢管混凝土拱桥模型振动台试验[J].北京工业大学学报,2012,(9):1302-1309.(LI Yong,REN Xiao-qiang,YAN Wei-ming,et al.Sha-king Table Study on a Three-Span Irregular CFST Arch Bridge Model[J].Journal of Beijing University of Tech-nology,2012,(9):1302-1309.in Chinese)
[7]钟栋青,王曙光,刘伟庆.连续梁桥纵向减震性能振动台试验与理论分析[J].土木工程学报,2012,(11):145-152.(ZHONG Dong-qing,WANG Shu-guang,LIU Wei-qing.Shaking Table Experimental Study and Theoretical Analy-sis of Longitudinal Seismic-Reduced Behavior of Continu-ous Beam Bridges[J].China Civil Engineering Journal,2012,(11):145-152.in Chinese)
[8]王蕾.大跨度刚构桥地震响应分析及振动台试验研究(博士学位论文)[D].北京:北京交通大学,2010.(WANG Lei.Seismic Response Analysis and Shaking Table Test Study of Long-Span Rigid-Frame Bridge(Doc-torate Dissertation)[D].Beijing:Beijing Jiaotong Uni-versity,2010.in Chinese)
[9]张春蕾.地震动输入对大跨度桥梁抗震影响的振动台试验研究(硕士学位论文)[D].重庆:重庆交通大学,2009.(Zhang Chun-lei.Shaking Table Test for the Effect of Ground Motion Input to Seismic Response of Long-span Bridge[D].Chongqing:Chongqing Jiaotong University,2009.in Chinese)
[10]房贞政,张超,陈永健,等.基于三台阵振动台的多塔斜拉桥试验研究[J].土木工程学报,2012,(S1):25-29.(FANG Zhen-zheng,ZHANG Chao,CHEN Yong-jian,et al.Test Study of Multi-Tower Cable-Stayed Bridge Based on Three Shaking Tables System[J].China Civil Engineering Journal,2012,(S1):25-29.in Chi-nese)
[11]Meng-Hao Tsai,Si-Yi Wu,Kuo-Chun Chang,et al.Shaking Table Tests of a Scaled Bridge Model with Roll-ing-Type Seismic Isolation Bearings[J].Engineering Structures,2007,29(5):694-702.
[12]Nathan Johnson,M Saiid Saiidi,David Sanders.Nonlinear Earthquake Response Modeling of a Large-Scale Two-Span Concrete Bridge[J].Journal of Bridge Engineering,2009,14(6):460-471.
[13]林皋,朱彤,林蓓.结构动力模型试验的相似技巧[J].大连理工大学学报,2000,40(1):1-8.(LIN Gao,ZHU Tong,LIN Bei.Similarity Technique for Structural Dynamic Model Test[J].Journal of Dalian University of Technology,2000,40(1):1-8.in Chi-nese)
[14]陈常松,颜东煌,田仲初,等.岳阳洞庭湖大桥模型动力相似理论分析[J].桥梁建设,2002,(1):48-51.(CHEN Chang-song,YAN Dong-huang,TIAN Zhong-chu,et al.Dynamical Similarity Theory Analysis of Model of Yueyang Dongting Lake Bridge[J].Bridge Construction,2002,(1):48-51.in Chinese)
[2]唐光武,黄福伟,郑罡.厦漳跨海大桥抗震分析与模型试验研究[R].重庆:招商局重庆交通科研设计院有限公司,2009.(TANG Guang-wu,HUANG Fu-wei,ZHENG Gang.Seismic Analysis and Model Test Study of Xiazhang Sea-Crossing Bridge[R].Chongqing:China Merchants Chongqing Transport Research&Design Institute Co.,Ltd.,2009.in Chinese)
[3]唐光武,郑万山,郑罡,等.重庆朝天门长江大桥动力模型试验研究[J].公路,2009,(5):146-151.(TANG Guang-wu,ZHENG Wan-shan,ZHENG Gang,et al.Dynamic Model Test Study of Chongqing Chaotian-men Yangtze River Bridge[J].Highway,2009,(5):146-151.in Chinese)
[4]高文军,牛松山,兰海燕.单索面独塔斜拉桥振动台模型试验研究[J].公路交通技术,2010,(2):45-48.(GAO Wen-jun,NIU Song-shan,LAN Hai-yan.Shaking Table Model Test Study of a Cable-Stayed Bridge with a Single Cable Plane and Single Tower[J].Technology of Highway and Transport,2010,(2):45-48.in Chi-nese)
[5]王曙光,刘伟庆,徐秀丽,等.大跨连续梁桥纵向消能减震振动台模型试验[J].中国公路学报,2009,(5):54-59.(WANG Shu-guang,LIU Wei-qing,XU Xiu-li,et al.Shaking Table Model Test of Longitudinal Seismic Energy Dissipation and Seismic Mitigation for Long-Span Continu-ous Girder Bridge[J].China Journal of Highway and Transport,2009,(5):54-59.in Chinese)
[6]李勇,任晓强,闫维明,等.三跨飞燕式异型钢管混凝土拱桥模型振动台试验[J].北京工业大学学报,2012,(9):1302-1309.(LI Yong,REN Xiao-qiang,YAN Wei-ming,et al.Sha-king Table Study on a Three-Span Irregular CFST Arch Bridge Model[J].Journal of Beijing University of Tech-nology,2012,(9):1302-1309.in Chinese)
[7]钟栋青,王曙光,刘伟庆.连续梁桥纵向减震性能振动台试验与理论分析[J].土木工程学报,2012,(11):145-152.(ZHONG Dong-qing,WANG Shu-guang,LIU Wei-qing.Shaking Table Experimental Study and Theoretical Analy-sis of Longitudinal Seismic-Reduced Behavior of Continu-ous Beam Bridges[J].China Civil Engineering Journal,2012,(11):145-152.in Chinese)
[8]王蕾.大跨度刚构桥地震响应分析及振动台试验研究(博士学位论文)[D].北京:北京交通大学,2010.(WANG Lei.Seismic Response Analysis and Shaking Table Test Study of Long-Span Rigid-Frame Bridge(Doc-torate Dissertation)[D].Beijing:Beijing Jiaotong Uni-versity,2010.in Chinese)
[9]张春蕾.地震动输入对大跨度桥梁抗震影响的振动台试验研究(硕士学位论文)[D].重庆:重庆交通大学,2009.(Zhang Chun-lei.Shaking Table Test for the Effect of Ground Motion Input to Seismic Response of Long-span Bridge[D].Chongqing:Chongqing Jiaotong University,2009.in Chinese)
[10]房贞政,张超,陈永健,等.基于三台阵振动台的多塔斜拉桥试验研究[J].土木工程学报,2012,(S1):25-29.(FANG Zhen-zheng,ZHANG Chao,CHEN Yong-jian,et al.Test Study of Multi-Tower Cable-Stayed Bridge Based on Three Shaking Tables System[J].China Civil Engineering Journal,2012,(S1):25-29.in Chi-nese)
[11]Meng-Hao Tsai,Si-Yi Wu,Kuo-Chun Chang,et al.Shaking Table Tests of a Scaled Bridge Model with Roll-ing-Type Seismic Isolation Bearings[J].Engineering Structures,2007,29(5):694-702.
[12]Nathan Johnson,M Saiid Saiidi,David Sanders.Nonlinear Earthquake Response Modeling of a Large-Scale Two-Span Concrete Bridge[J].Journal of Bridge Engineering,2009,14(6):460-471.
[13]林皋,朱彤,林蓓.结构动力模型试验的相似技巧[J].大连理工大学学报,2000,40(1):1-8.(LIN Gao,ZHU Tong,LIN Bei.Similarity Technique for Structural Dynamic Model Test[J].Journal of Dalian University of Technology,2000,40(1):1-8.in Chi-nese)
[14]陈常松,颜东煌,田仲初,等.岳阳洞庭湖大桥模型动力相似理论分析[J].桥梁建设,2002,(1):48-51.(CHEN Chang-song,YAN Dong-huang,TIAN Zhong-chu,et al.Dynamical Similarity Theory Analysis of Model of Yueyang Dongting Lake Bridge[J].Bridge Construction,2002,(1):48-51.in Chinese)
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