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  赵宇翔.支座形式对简支梁桥地震反应的影响[J].震灾防御技术,2018,13(4):903-910, DOI:10.11899/zzfy20180417.

支座形式对简支梁桥地震反应的影响
摘要:    本文选取1座简支小箱梁桥,采用有限元分析软件SAP2000建立有限元模型,选择与规范反应谱频谱特性一致的实际地震记录作为输入进行时程反应分析,在墩、梁之间分别设置普通板式橡胶支座、铅芯橡胶支座和高阻尼橡胶支座,比较桥梁纵向和横向的地震反应,分析铅芯橡胶支座和高阻尼橡胶支座的减震效果,并从周期延长和能量耗散2方面分析减隔震支座的减震性能。结果表明,2种减隔震支座均可有效起到减隔震的作用,可以显著改善桥梁结构的抗震性能。
作者单位
赵宇翔 同济大学, 土木工程学院, 上海 200092 
关  键  词:小箱梁桥  减隔震支座  地震反应  周期延长  耗能
DOI:10.11899/zzfy20180417
基金项目:
收稿日期:2018-08-15
作者简介:赵宇翔,男,生于1996年。本科在读。研究方向:土木工程。E-mail:645111097@qq.com
通讯作者:
Influence of Bridge Bearing to the Seismic Response of Simplified Supported Beam Bridge
Abstract:      In this paper, we used finite analysis software SAP2000 to establish a finite element model of a typical multi-box girder bridge. After choosing several real seismic records which have similar spectral characteristics with response spectrum of the code as input for time-history analysis, longitudinal and lateral seismic responses were analyzed when using GJZ, LRB and HDRB respectively as bridge bearing. In this way, we can compare the damping effect of LRB and HDRB, as well as the vibration reduction performance from the aspects of prolonging the period and dissipating energy. The results indicated that two types of isolating bearing were both efficient in seismic reduction and isolation, thus they can contribute to ameliorate the seismic behavior of the whole bridge.
Keywords:  Multi-box girder bridges  Isolating bearing  Seismic response  Prolonging period  Dissipating energy
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