地震下大跨径连续刚构桥合理约束体系研究

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摘要为了研究地震作用下的大跨径连续刚构桥约束体系问题，在概念设计阶段即着手提高桥梁的抗震性能，针对当前相关技术和装置现状，提出了5种不同的约束体系进行分析处理。结合某110m+210m+110m三跨连续刚构桥，使用三维空间有限元分析软件，采用非线性时程分析方法，对比了5种不同约束体系下桥梁的桩顶、墩底、墩顶等截面的弯矩值和位移值。结果表明，对于所研究的主跨大于150m的大跨径连续刚构桥，在过渡墩处设置拉索钢阻尼减震支座和粘滞阻尼器组合体系是最合适的约束体系，使各墩的地震力合理分配，更好的提高了桥梁整体抗震水平。本文取得的研究成果，可供同类大跨连续刚构桥借鉴。

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	周敉
	朱国强
	吴江
	卢伟
	刘平均

关键词 ：连续刚构桥, 桥梁抗震, 约束体系, 非线性

Abstract：In order to study the seimic performance of the restraint system for a long-span continuous rigid frame bridge under earthquake action and improve the overall earthquake resistance level of the bridge at the conceptual design stage, five different constraint systems were proposed for analysis and processing based on the current state of related technologies and devices.For a three-span continuous rigid frame bridge, using the three dimensional finite element analysis software and nonlinear time history analysis method, the bending moments at the top and bottom of piers as well as the displacement at the pier tops when using five different restraint systems were comparatively analysed.The results show that for the long-span continuous rigid frame bridge with the main span of more than 150 m, the cable-stayed damping bearing and the viscous damper combination system is the most suitable restraint system, the distribution of seismic forces on the piers is rather reasonable and the overall seismic level of the bridge can be better improved.The research results can be used in the design of similar long-span continuous rigid frame bridges.

Key words： Continuous Rigid Frame Bridge Bridge seismic Constraint system Nonlinear;

收稿日期: 2018-05-17 出版日期: 2019-05-15

引用本文:

周敉，朱国强，吴江，卢伟，刘平均. 地震下大跨径连续刚构桥合理约束体系研究[J]. 振动与冲击, 2019, 38(10): 98-104.
ZHOU Mi, ZHU Guoqiang, WU Jiang, LU Wei, LIU Pingjun. Constraint system for a long-span continuous rigid frame bridge under earthquake. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(10): 98-104.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I10/98

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