斜拉桥索梁锚固区受力有限元分析及其优化设计

Finite Element Analysis and Optimization Design of Cable Girder Anchorage Zone

以某公路斜拉桥为例,采用壳单元建立了斜拉桥索梁锚固区的有限元模型,对索梁锚固区最不利载荷组合作用下的应力分布进行了分析与计算。结果表明:索梁锚固区的加劲板边角处的von Miss应力值达到281MPa,是结构应力集中的区域。对加劲板结构进行了优化设计,降低了应力集中。

Taking a highway cable-stayed bridge as an example,in this paper the finite element model of the cable-stayed bridge anchorage zones was established by using shell elements theory and the stress distribution of anchorage zone under the most unfavorable load combination was calculated.The calculation results show that the stiffener corners of anchorage zones is structural stress concentration region and its Von Miss stress value reaches to 281MPa.The optimum design of stiffener is carried out which can reduce stress concentration and provide reliable protection for the design and construction of the actual bridge.