斜拉-刚构组合体系桥零号块空间应力分析

以河谷汉江公路大桥斜拉桥主桥部分作为依托工程,针对其零号块空间受力问题,采用有限元软件midas FEA建立零号块有限元模型并进行相应分析.以施工过程中成桥运营阶段最大弯矩工况、最大剪力工况以及施工阶段最大双悬臂工况为控制计算工况,分析3种工况下零号块最不利内力情况.研究表明,在现有的设计条件下,结构受力可满足规范要求,相应的设计细节可为类似的工程提供借鉴.

Spatial Stress Analysis of Zero Block of Cable-stayed-rigid-frame Composite Bridge

Taking a large-span cable-stayed rigid frame composite system bridge as the supporting project, aiming at the space stress problem of the zero block, the finite element software midas FEA is used to establish the zero block finite element model and carry out corresponding analysis. In the construction process, the maximum bending moment condition, the maximum shear force condition and the maximum double cantilever condition in the construction stage during the construction of the bridge are used as the control calculation conditions, and the most unfavorable internal forces of the zero block under the three conditions are analyzed. The research shows that under the existing design conditions, the structural force can meet the requirements of the specification, and the corresponding design details can provide reference for similar projects.