在调查国内已建成PC斜拉桥主梁截面形式及尺寸的基础上,以百色东合大桥为工程背景,采用参数化的有限元实体模型,从横向和局部受力以及稳定性角度,对PC斜拉桥最常用的肋板式主梁截面进行梁高、纵向加劲肋、顶板厚度和边肋厚度等参数的优化分析,并分析不同参数变化对结构受力状态影响的灵敏度,给出了合理的参数取值及设计建议,为同类形式斜拉桥主梁设计提供依据。 Based on the investigation of the cross-sectional form and size of the mainstay of PC cable-stayed bridge in China, taking the Baise Donghe Bridge as the engineering background, the parametric finite element model was used to analyze the influence of PC The most commonly used ribbed girder section of the cable-stayed bridge is optimized for beam height, longitudinal stiffener, roof thickness and edge rib thickness, and the sensitivity of different parameters to the stress state of the structure is analyzed. The reasonable The value of the parameter and the design suggestion, provide the basis for the design of the main girder of the similar type of cable-stayed bridge.