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红水河特大斜拉桥为不对称斜拉桥,桥面结构在纵向(结合段)和竖向(叠合梁)都采用了钢与混凝土组合形式,受地形、水位限制,贵州岸边跨叠合梁拟采用顶推法施工。顶推过程中,结构变形及其应力分布均为动态变化,易发生应力集中现象。为确保施工安全,采用有限元软件Midas对桥梁顶推施工全过程进行空间仿真分析。经分析可知:桥梁施工中各部件出现最不利状态时的工况各不同。
The Hongshuihe large cable-stayed bridge is an asymmetrical cable-stayed bridge. The deck structure adopts the combination of steel and concrete both in the longitudinal direction (combined section) and in the vertical direction (composite beam). Due to the topography, water level limitation, Composite beam proposed to be used to push the construction method. In the process of pushing, the deformation and stress distribution of the structure are dynamic changes, and the stress concentration is easy to occur. In order to ensure the safety of the construction, the finite element software Midas is used to carry out the spatial simulation analysis of the whole process of pushing the bridge. The analysis shows that: the bridge construction of the most unfavorable conditions of each component when the conditions are different.