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本文对防屈曲支撑(BRB)在连续梁桥中的安装及其对桥梁抗震性能的影响进行了研究,为防屈曲支撑在桥梁加固中的应用提供了参考。全文以某三跨连续梁桥为研究对象,提出了防屈曲支撑在连续梁桥中双向安置的安装方法。建立四种工况,并对不同长度的防屈曲支撑建立有限元模型,对比分析桥梁各关键部位的地震响应,得出减震效果最佳的支撑长度。根据分析结果可知,防屈曲支撑双向安置能有效地提高桥梁的抗震性能,是一种较好的桥梁加固方法。
In this paper, the installation of anti-buckling brace (BRB) in continuous girder bridge and its influence on the seismic performance of the bridge are studied, which provides reference for the application of buckling-resistant brace in bridge reinforcement. Full-text Take a three-span continuous girder bridge as the research object, the installation method of the buckling brace in the two-way girder bridge is proposed. Four conditions are established, and the finite element model of buckling brace with different length is established. The seismic response of each key part of the bridge is compared and analyzed, and the best supporting length is obtained. According to the analysis results, it can be seen that the anti-buckling brace bi-directional placement can effectively improve the seismic performance of the bridge, which is a good method of bridge reinforcement.