多点激励下多跨斜拉桥缩尺模型的地震响应研究.部分1:振动台试验（英文）

发布时间：2018-04-09 12:09

本文选题：多塔斜拉桥　切入点：地震模拟振动台台阵试验　出处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2014年05期

【摘要】：研究目的:为多塔斜拉桥在一致激励和非一致激励下地震响应的研究提供地震模拟振动台全桥试验方法,并有助于加强多塔斜拉桥抗震性能和抗震设计的认识。创新要点:1.建立了地震模拟振动台多台阵试验方法,并首次将其应用于多塔斜拉桥全桥比例缩尺模型的地震响应分析之中;2.通过地震模拟振动台试验,揭示了多塔斜拉桥在多点一致激励和多点非一致激励的地震响应特性并提出了多塔斜拉桥在强震下的破坏模式。研究方法:1.基于动力相似理论,设计与制作了多塔斜拉桥的全桥比例缩尺模型(图2);2.利用地震模拟振动台多台阵试验,根据在不同地震波作用下和考虑行波效应后多塔斜拉桥模型的主梁和主塔响应,分析了多塔斜拉桥在多点一致激励和多点非一致激励的地震响应特性(图5~图8);3.根据在地震波不同强度作用下多塔斜拉桥模型的主梁和主塔响应,分析了多塔斜拉桥在强震下的破坏模式和地震响应(图9)。重要结论:1.江心波作用下该多塔斜拉桥的地震响应大于其他三种地震波;2.多塔斜拉桥在抗震设计时需要考虑行波效应的影响;3.在El-Centro波的加速度峰值高达4.0 m/s2时,多塔斜拉桥模型出现了支座破坏。
[Abstract]:The purpose of this study is to provide an experimental method for the seismic response of multi-tower cable-stayed bridges under uniform and non-uniform excitation, and to enhance the understanding of seismic performance and seismic design of multi-tower cable-stayed bridges.Innovation points: 1.The multi-array test method of seismic simulation table is established and applied to the seismic response analysis of the scale scale model of multi-tower cable-stayed bridge for the first time.The seismic response characteristics of multi-tower cable-stayed bridge under multi-point consistent excitation and multi-point non-uniform excitation are revealed by seismic simulation shaking table test and the failure mode of multi-tower cable-stayed bridge under strong earthquake is proposed.Research method: 1.Based on the dynamic similarity theory, a full bridge scale model for cable-stayed bridges with multiple towers is designed and fabricated (Fig. 2 / 2).In this paper, the main beam and the main tower response of the multi-tower cable-stayed bridge model under different seismic waves and considering the traveling wave effect are analyzed by using the seismic simulation table multi-array test.The seismic response characteristics of multi-tower cable-stayed bridge under multi-point consistent excitation and multi-point non-uniform excitation are analyzed (Fig. 5 ~ fig. 8 / 3).According to the main beam and the main tower response of the multi-tower cable-stayed bridge model under the action of different seismic waves, the failure mode and seismic response of the multi-tower cable-stayed bridge under strong earthquake are analyzed (Fig. 9).Important conclusion: 1.The seismic response of the multi-tower cable-stayed bridge is larger than that of the other three kinds of seismic waves under the action of river center wave.The influence of traveling wave effect should be considered in seismic design of multi-tower cable-stayed bridge.When the peak acceleration of El-Centro wave is up to 4.0 m/s2, the support failure occurs in the multi-tower cable-stayed bridge model.
【作者单位】： School
【基金】：Project supported by the National Natural Science Foundation of China(Nos.51178101 and 51378112) the Doctoral Program Project of the Ministry of Education(No.20110092110011) the National Key Laboratory of Civil Engineering Disaster Prevention of Tongji University(No.SLDRCE08-HZ-02),China
【分类号】：U448.27;U442.55

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