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以工程实例为背景,建立有限元模型,研究独塔双索面斜拉桥在塔墩固结前提下,塔梁固结体系、固定支座连接塔梁分离体系及减隔震支座连接塔梁分离体系的动力特性,分析比较了3种结构体系在相同地震时程波作用下的地震响应,重点关注减隔震支座连接的塔梁分离体系的地震响应变化,根据分析对比结果,对该种斜拉桥提出了合理的结构体系。
Taking the engineering example as the background, the finite element model is established to study the connection between tower girder consolidation system, tower-girder consolidation system, tower-girder separation system and seismic isolation bearing tower under the precondition of consolidation of tower pylon. The dynamic characteristics of the beam separation system are analyzed and compared. The seismic responses of the three kinds of structural systems under the same seismic time-history wave are analyzed and compared. The seismic response changes of the tower-beam separation system connected with the seismic isolation bearing are mainly concerned. According to the analysis and comparison results, The cable-stayed bridge proposed a reasonable structural system.