连续刚构桥顺桥向非线性地震反应研究
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摘要
以一座大跨高墩连续刚构桥为对象,采用纤维单元,建立该桥的动力分析模型,沿顺桥方向分别输入不同类型场地上的实际地震动,计算其非线性时程响应。比较了场地条件对大跨高墩连续刚构桥地震响应的影响,指出了连续刚构桥墩高差异较大时抗震设计中应注意的问题,并讨论了轴压比对桥墩滞回性能的影响。
Taking a high-pier and long-span continuous rigid frame bridge as the research project,the dynamic time-history analysis model is established by using the fiber element.By inputting the actual seismic waves in longitudinal direction of different site conditions into the analysis model,their nonlinear time-history responses are analyzed respectively.Based on the analysis results,the effects of seismic response due to different site conditions are compared.And some problems needing attention in seismic design of continuous rigid bridge are pointed out.And the effect of axial compression ratio on hysteretic behavior of pier is also discussed.
Taking a high-pier and long-span continuous rigid frame bridge as the research project,the dynamic time-history analysis model is established by using the fiber element.By inputting the actual seismic waves in longitudinal direction of different site conditions into the analysis model,their nonlinear time-history responses are analyzed respectively.Based on the analysis results,the effects of seismic response due to different site conditions are compared.And some problems needing attention in seismic design of continuous rigid bridge are pointed out.And the effect of axial compression ratio on hysteretic behavior of pier is also discussed.
引文
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[4]夏修身,陈兴冲,王常峰,等.高墩大跨连续刚构桥抗震性能研究[J].西北地震学报,2010,32(1):88-91.Xia Xiushen,Chen Xingchong,Wang Changfeng,et al.Study on seismic performance of tall-pier and long-span continuous rigid-frame bridge[J].Northwestern Seismological Journal,2010,32(1):88-91.
[5]刘怀林,郑罡.大跨径连续刚构桥抗震分析及抗震性能评价[J].公路交通技术,2009(6):81-84.Liu Huailin,Zheng Gang.Seismic analysis and seismic perform-ance evaluation for large-span continuous rigid frame bridges[J].Technology of Highway and Transport,2009(6):81-84.
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[2]李忠献,史志利.行波激励下大跨度连续刚构桥的地震反应分析[J].地震工程与工程振动,2003,23(2):68-76.Li Zhongxian,Shi Zhili.Seismic response analysis for long-span continuous rigid-framed bridges under excitation of traveling waves[J].Earthquake Engineering and Engineering Vibration,2003,23(2):68-76.
[3]陈星烨,唐雪松,赵冰.修改的MPA法用于连续刚构桥的抗震性能分析[J].振动与冲击,2010,29(12):93-96.Chen Xingye,Tang Xuesong,Zhao Bing.Antiseismic performance analysis of a continuous rigid frame bridge by application of modi-fied MPA method[J].Journal of Vibration and Shock,2010,29(12):93-96.
[4]夏修身,陈兴冲,王常峰,等.高墩大跨连续刚构桥抗震性能研究[J].西北地震学报,2010,32(1):88-91.Xia Xiushen,Chen Xingchong,Wang Changfeng,et al.Study on seismic performance of tall-pier and long-span continuous rigid-frame bridge[J].Northwestern Seismological Journal,2010,32(1):88-91.
[5]刘怀林,郑罡.大跨径连续刚构桥抗震分析及抗震性能评价[J].公路交通技术,2009(6):81-84.Liu Huailin,Zheng Gang.Seismic analysis and seismic perform-ance evaluation for large-span continuous rigid frame bridges[J].Technology of Highway and Transport,2009(6):81-84.
[6]JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[7]Computers and Structures Inc..Components&Elements of Perform-3D version4[CP/OL].California:Computers and Structures Inc.,2006.
[8]Mander J B,Priestley M J N,Park R.Theoretical stress-strain model for confined concrete[J].Journal of Structural Engineering,1988,114(8):1804-1826.
[9]Pinto A V,Molina J,Tsionis G.Cyclic tests on large-scale models of existing bridge piers with rectangular hollow cross-section[J].Earthquake Engineering and Structural Dynamic,2003,32:1995-2012.
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