拱桥中组合桥面系应力不均匀性研究

拱桥中钢与混凝土组合桥面系结构构造和受力复杂。该文结合一组合桥面系的拱桥,采用有限元方法建立全桥空间有限元模型,其中对组合梁建立板壳模型,计算了不同荷载工况下的组合梁受力,得到了主梁各个部分构件的应力。研究了组合梁中混凝土顶板的应力分布的不均匀性,揭示了组合拱桥中钢与混凝土组合梁的应力分布特点,为同类结构的日后设计计算提供了参考。

Study on Stress Non-uniformity of Composite Deck System in Arch Bridge

The structure conformation and the mechanical character of steel and concrete composite deck system in arch bridge are complex. The article sets up the spatial finite element model for the whole bridge by the finite element method according to a composite deck system of arch bridge, in which the plate-shell model is set up for the composite girder to calculate the mechanical character of composite girder under the different loads, and give the stresses of various members of the main girder. The article studies the non-uniformity of stress distribution of top concrete deck in composite girder, and reveals the stresses distribution characteristics of steel and concrete composite girder in composite arch bridge, which can be referenced to calculate and design the similar bridges.