【摘要】 近年来,在频繁发生的强震中,大量的连续梁桥出现了构件破坏,甚至发生了整体倒塌的现象,因此,需要采用有效的减隔震措施以减少这类震害。本文提出了一种多功能减隔震支座,介绍了其构造、原理和力学性能,然后以一座连续箱梁桥为工程背景,基于动力显式有限元模型,分别进行了有无该支座下强震作用时该桥的倒塌仿真分析,得到其破坏模式,再对比分析了其减隔震效果。结果表明,该多功能减隔震支座具有较好的减隔震效果,在强震作用下,该连续梁桥的破坏模式得到了改善,得到的结论可为连续梁桥的减隔震技术及其应用提供参考。更多还原

【Abstract】 Under the frequency strong earthquakes,the failure phenomenon of the component in many continuous beam bridges have appeared even the whole structure collapse in recent years.Therefore,it is necessary to adopt the effective seismic control measures to decrease this seismic damage.In this paper,a new multifunction isolation bearing is proposed,its configuration design,working principles and the mechanical performance are introduced in detail.A continuous box beam bridge is taken as an example,the collapse simulation analysis of the bridge under strong earthquakes with the multifunction bearing is conducted to discuss the failure modes and the seismic control effect of the bridge using the bearing based on the dynamic explicit finite element model.The results show that the multifunction isolation bearing has better seismic control effect,and the failure model of the continuous beam bridge under strong earthquake is improved.It provides some references for the seismic control technology and their application of continuous beam bridges.更多还原