FRP约束钢筋混凝土桥墩抗震性能研究

发布时间：2018-03-09 05:00

本文选题：FRP　切入点：约束钢筋混凝土桥墩　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：桥梁结构是我国交通路网的重要组成部分，在地震作用下及其容易受到损坏，而桥梁的下部主要的承重构件桥墩，又是地震作用下桥梁结构中最易破坏的部位。桥墩在地震作用下的破坏往往是由于其变形能力不足而引发的脆性破坏，而经过FRP材料包裹之后的约束混凝土桥墩能够有效的提高原柱的峰值水平承载力及变形能提。因此探索研究FRP材料约束加固桥墩的抗震性能，保证桥梁整体结构在地震作用下能够保持结构的完整性，对人们的生命安全及国家的财产安全都有十分重要的保障。鉴于上述原因，，本文结合国内外研究的现状，采用数值模拟的方法对FRP约束桥墩进行抗震性能分析。本文的主要研究内容如下： (1)通过对国内外不同的FRP约束混凝土本构关系的研究对比，选择最适合本文研究的本构关系。 (2)运用OpenSees软件对已有的钢筋混凝土柱，不同FRP材料约束混凝土柱进行数值模拟分析，通过对比，验证OpenSees软件建模的正确性。 (3)通过对不同参数下钢筋混凝土柱与FRP约束混凝土柱在单向推力作用下的静力弹塑性分析，得出FRP在不同参数下的对钢筋混凝土柱的最佳约束效果。 (4)对不同参数下FRP约束混凝土柱在反复荷载作用下的滞回性能进行分析研究，得出FRP约束混凝土柱的综合抗震效果。
[Abstract]:The bridge structure is an important part of the traffic network in China. It is easy to be damaged under the earthquake, and the main load-bearing pier in the lower part of the bridge. It is also the most easily damaged part of bridge structure under earthquake. The failure of pier under earthquake is often caused by brittle failure caused by its insufficient deformation ability. But the confined concrete pier wrapped with FRP material can effectively improve the peak horizontal bearing capacity and deformation energy of the original column. Therefore, the seismic behavior of the pier strengthened with FRP material is studied. It is very important to ensure the integrity of the whole bridge structure under earthquake, which is very important to the safety of people's life and national property. In view of the above reasons, combined with the current research situation at home and abroad, this paper uses the numerical simulation method to analyze the seismic behavior of FRP constrained pier. The main contents of this paper are as follows:. 1) by comparing the different constitutive relations of FRP confined concrete at home and abroad, the most suitable constitutive relation for this paper is selected. 2) numerical simulation and analysis of existing reinforced concrete columns and concrete columns with different FRP materials are carried out by using OpenSees software, and the correctness of OpenSees software modeling is verified by comparison. 3) through the static elastic-plastic analysis of reinforced concrete column and FRP confined concrete column under unidirectional thrust under different parameters, the best constraint effect of FRP on reinforced concrete column under different parameters is obtained. 4) the hysteretic behavior of FRP confined concrete columns under repeated load is analyzed and studied under different parameters, and the comprehensive seismic effect of FRP confined concrete columns is obtained.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.22;U442.55

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