材料参数对高速铁路连续梁桥地震易损性分析的影响研究

发布时间：2018-01-13 21:33

本文关键词：材料参数对高速铁路连续梁桥地震易损性分析的影响研究　出处：《铁道标准设计》2017年07期 　论文类型：期刊论文

【摘要】：中等跨径的预应力混凝土连续梁广泛应用于高速铁路,以往震害及实验都表明该类桥型在地震下的破坏集中在桥墩和支座位置。为了研究材料参数对高速铁路连续梁桥地震易损性的影响,采用IDA方法,利用有限元软件Open Sees建立地震易损性分析模型。定义4种破坏极限状态,基于对数正太分布假设绘制各个破坏状态对应的易损性曲线。通过更改材料参数得到新的计算模型,并通过对比易损性计算结果来评价材料参数对桥梁抗震性能的影响。结果表明,高速铁路连续梁桥桥墩配箍率较低,提高桥墩混凝土强度等级对桥梁抗震性能改善较大。
[Abstract]:Medium span prestressed concrete continuous beam is widely used in high speed railway, the earthquake damage and experiments show that this kind of bridge under the earthquake damage on the piers and supports position. In order to study the influence of material parameters of continuous beam bridge seismic vulnerability of high-speed railway, using IDA method, the seismic vulnerability analysis model using the finite element software Open Sees. Definition 4 failure limit state, logarithmic distribution hypothesis vulnerability curves of teenage boy each damage state of the corresponding calculation model based on the new obtained by changing material parameters, and to evaluate the effect of material parameters on the seismic performance of bridges by comparing the vulnerability calculation results. The results show that the high speed railway continuous bridge pier reinforcement low rate, improve the concrete strength of bridge pier seismic performance is improved greatly.

【作者单位】：四川大学锦城学院;
【分类号】：U442.55
【正文快照】： 目前,中国高速铁路正如火如荼地建设中。由于刚度大、振动小、挠度小、行车平顺等优点,连续梁桥在高速铁路中被大量采用[1]。历史震害表明,桥梁结构这一交通系统的关键节点,在地震发生时极易发生损害[2]。近期,我国的汶川、玉树、芦山相继发生地震,大量桥梁工程被损坏,导致了

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