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东苕溪大桥的主塔为双向倾斜混合拱形塔柱,上部钢结构与下部混凝土结构间通过结合部实现刚度过渡和内力的传递,构造及受力复杂。选取包括承台在内的半个主塔结构,建立考虑钢与混凝土之间相对滑移和接触的精细化实体-板壳有限元计算模型,分析塔柱线形和连接件布置等调整时对结合部受力性能的影响。通过合理化设计,结合部混凝土应力分布均匀,刚度过渡平稳,塔柱受力性能得到改善。
The main tower of Dongbaoxi Bridge is a two-way inclined mixed arched tower, and the transition between the upper steel structure and the lower concrete structure is achieved through the combination of stiffness and internal force. The structure and force are complex. Select the half of the main tower structure including the cap to establish the finite element model of the solidification of the shell and shell considering the relative slip and contact between the steel and the concrete, Department of the force performance. Through the rational design, the concrete stress distribution in the joint is uniform, the stiffness transition is stable, and the force performance of the tower is improved.