中小跨径板式橡胶支座梁桥横向抗震设计研究

发布时间：2018-06-20 02:23

本文选题：桥梁工程 + 横向抗震设计　；参考：《土木工程学报》2016年11期

【摘要】：为提高中小跨径板式橡胶支座梁桥在强震作用下的横向抗震性能,在总结汶川震区该类梁桥震害特点和国内外桥梁抗震设计规范中相关抗震设计策略规定的基础上,归纳当前我国板式橡胶支座梁桥横向抗震体系存在的问题,提出适合我国中小跨径板式橡胶支座梁桥的横向抗震设计方法,即允许上、下部结构连接构件牺牲的准隔震设计方法,介绍该抗震设计方法设计思想,给出在两设防水准下结构各部件的性能目标要求。选择一座典型板式橡胶支座简支梁桥为研究对象,基于文中抗震设计方法的设计思想,提出采用新型隔震系统对计算桥例进行准隔震设计。结果表明:通过对横向限位装置力学性能参数的合理设计,通过桥梁结构在强震作用下板式橡胶支座的滑移、横向限位装置的损伤或牺牲,控制上、下部结构间传递的梁体惯性力,保护墩柱和基础等下部结构免遭严重损害,同时能有效控制墩梁相对位移,防止过大的梁体移位导致的交通阻断、甚至落梁。
[Abstract]:In order to improve the transverse seismic behavior of the medium and small span plate type rubber bearing beam bridge under strong earthquake, the earthquake damage characteristics of this kind of beam bridge in Wenchuan earthquake area and the relevant seismic design strategy provisions in the seismic design code of domestic and foreign bridges are summarized. This paper summarizes the problems existing in the transverse seismic system of the plate rubber bearing beam bridge in our country, and puts forward the transverse seismic design method suitable for the medium and small span plate rubber bearing beam bridge in our country, that is, the allowable upper, This paper introduces the design idea of the quasi isolation design method for the substructure connection members, and presents the performance target requirements of each component of the structure under the two fortification leveling. Based on the design idea of aseismic design method, a new type of isolation system is proposed for quasi isolation design of a typical plate rubber bearing simple supported beam bridge based on the design idea of the seismic design method in this paper. The results show that: through the reasonable design of mechanical performance parameters of the transverse limit device, the slip of the plate rubber bearing under strong earthquake, the damage or sacrifice of the transverse limiting device, and the control of the bridge structure under the action of strong earthquake, The transmissible inertia force between the substructures can protect the pier, column and foundation from serious damage. At the same time, it can effectively control the relative displacement of the pier and beam, prevent the traffic blocking caused by the excessive displacement of the beam body, and even the fall of the beam.
【作者单位】：同济大学土木工程防灾国家重点实验室;上海市政工程设计研究总院(集团)有限公司;
【基金】：“九七三”国家重点基础研究发展计划(2013CB03600) 国家自然科学基金(51278371)
【分类号】：U442.55

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