高烈度区高墩桥梁抗震措施研究
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摘要
为研究高烈度区(设防烈度8.5度)高墩桥梁抗震措施,以位于高烈度区的某高墩桥梁为例进行分析。建立该桥所有联的线弹性计算模型,进行动力特性分析和反应谱分析。分析结果表明:支座顶面与梁底面发生了相对滑移,支座剪切变形较大,存在落梁隐患。在该桥上设计合适的顺桥向连梁装置、横向弹塑性挡块等抗震措施后,通过非线性时程分析验证其抗震效果。分析结果表明,采用的抗震措施可有效地控制墩顶位移、减小地震反应。
To study the seismic resistance measures for high-rise pier bridges located in high intensity seismic region(seismic fortification intensity 8.5°),a high-rise pier continuous girder bridge in the region was cited as an example and analyzed.The linear elastic calculation models for all continuous units of the bridge were built and the analysis of the dynamic behavior and response spectrum was performed.The results of the analysis show the relative slip at the top of the bearings and at the bottom of the girder of the bridge takes place,the shear deformation of the bearings is great and the potential danger of fall of the girder exists.After the seismic resistance measures,such as the appropriate longitudinal girder link devices and the transverse elastic stopping blocks,are designed for the bridge,the effect of the measures has been verified by the nonlinear time-history analysis and the results of the analysis show that the measures can effectively control the displacement atop the piers and reduce the seismic response.
To study the seismic resistance measures for high-rise pier bridges located in high intensity seismic region(seismic fortification intensity 8.5°),a high-rise pier continuous girder bridge in the region was cited as an example and analyzed.The linear elastic calculation models for all continuous units of the bridge were built and the analysis of the dynamic behavior and response spectrum was performed.The results of the analysis show the relative slip at the top of the bearings and at the bottom of the girder of the bridge takes place,the shear deformation of the bearings is great and the potential danger of fall of the girder exists.After the seismic resistance measures,such as the appropriate longitudinal girder link devices and the transverse elastic stopping blocks,are designed for the bridge,the effect of the measures has been verified by the nonlinear time-history analysis and the results of the analysis show that the measures can effectively control the displacement atop the piers and reduce the seismic response.
引文
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[2]庄卫林,余翔,易志宏,等.简支体系桥梁的震害及抗震设计对策[J].桥梁建设,2008,(4):61-64.(ZHUANG Wei-lin,YU Xiang,YI Zhi-hong,et al.SeismicDamage and Design Countermeasures of Simply-SupportedSystem Bridges[J].Bridge Construction,2008,(4):61-64.in Chinese)
[3]Priestley M N,Seible F,Calvi GM.Seismic Design and Retro-fit of Bridge[M].New York:Wiley&Sons Inc.,1996.
[4]徐秀丽,马静静,郎冬梅,等.高烈度地震区板式桥抗震性能研究[J].桥梁建设,2009,(1):22-24,28.(XU Xiu-li,MA Jing-jing,LANG Dong-mei,et al.Study ofSeismic Resistance Performance of Slab Bridges in High Inten-sity Seismic Region[J].Bridge Construction,2009,(1):22-24,28.in Chinese)
[5]JTG/T B02-01-2008,公路桥梁抗震设计细则[S].(JTG/T B02-01-2008,Guideline for Seismic Design of High-way Bridges[S].)
[6]李睿,叶燎原,杨忠恒,等.高烈度地震区梁桥高墩的选型和设计[J].昆明理工大学学报,2008,33(1):52-55,97.(LI Rui,YE Liao-yuan,YANG Zhong-heng,et al.Form Se-lection and Design of High Piers in High Seismic Intensity Re-gion[J].Journal of Kunming University of Science and Tech-nology,2008,33(1):52-55,97.in Chinese)
[7]屈爱平,高淑英.梁-墩-桩基的动力特性研究[J].西南交通大学学报,2001,36(6):641-644.(QU Ai-ping,GAO Shu-ying.Vibration Characteristics of a3-Dimensional Beam-Pier-Pile System[J].Journal of South-west Jiaotong University,2001,36(6):641-644.in Chi-nese)
[8]A Caner.Seismic Performance of Multisimple-Span BridgesRetrofitted with Link Slabs[J].Journal of Bridge Engineer-ing,March-April,2002,85-95.
[2]庄卫林,余翔,易志宏,等.简支体系桥梁的震害及抗震设计对策[J].桥梁建设,2008,(4):61-64.(ZHUANG Wei-lin,YU Xiang,YI Zhi-hong,et al.SeismicDamage and Design Countermeasures of Simply-SupportedSystem Bridges[J].Bridge Construction,2008,(4):61-64.in Chinese)
[3]Priestley M N,Seible F,Calvi GM.Seismic Design and Retro-fit of Bridge[M].New York:Wiley&Sons Inc.,1996.
[4]徐秀丽,马静静,郎冬梅,等.高烈度地震区板式桥抗震性能研究[J].桥梁建设,2009,(1):22-24,28.(XU Xiu-li,MA Jing-jing,LANG Dong-mei,et al.Study ofSeismic Resistance Performance of Slab Bridges in High Inten-sity Seismic Region[J].Bridge Construction,2009,(1):22-24,28.in Chinese)
[5]JTG/T B02-01-2008,公路桥梁抗震设计细则[S].(JTG/T B02-01-2008,Guideline for Seismic Design of High-way Bridges[S].)
[6]李睿,叶燎原,杨忠恒,等.高烈度地震区梁桥高墩的选型和设计[J].昆明理工大学学报,2008,33(1):52-55,97.(LI Rui,YE Liao-yuan,YANG Zhong-heng,et al.Form Se-lection and Design of High Piers in High Seismic Intensity Re-gion[J].Journal of Kunming University of Science and Tech-nology,2008,33(1):52-55,97.in Chinese)
[7]屈爱平,高淑英.梁-墩-桩基的动力特性研究[J].西南交通大学学报,2001,36(6):641-644.(QU Ai-ping,GAO Shu-ying.Vibration Characteristics of a3-Dimensional Beam-Pier-Pile System[J].Journal of South-west Jiaotong University,2001,36(6):641-644.in Chi-nese)
[8]A Caner.Seismic Performance of Multisimple-Span BridgesRetrofitted with Link Slabs[J].Journal of Bridge Engineer-ing,March-April,2002,85-95.
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