斜拉桥耳板式索梁锚固结构的空间分析

利用有限元分析软件,建立深圳湾公路大桥索梁锚固区仿真模型,进行耳板式锚固结构的接触应力分析,研究主梁顶板、腹板、横隔板以及锚固区耳板上的应力分布情况。结果表明:锚固区Mises应力极值出现在耳板销孔两侧,大致关于斜拉索对称;锚固区各构件应力在局部区域数值较大,但扩散较快,应力传递流畅;索梁锚固结构承载能力满足要求。建议耳板式索梁锚固结构的耳板材料采用高强度钢材,且应对销孔周围进行局部加强。

3D Analysis on Anchorage Zone between Beam and Cable in Cable-stayed Bridge

By finite element analytical software of ANSYS, the simulation model of anchorage zones between beam and cable in Shenzhen Bay Highway Bridge is created to analyze the contact stress of the ear plate structure. The stress distribution of some structural members are studied, such as the top slab of the main girder, the web plate, the transverse septum and the ear plate in the anchorage zone. Results indicate that the maximum Von. Mises stress appears on both sides of the pin hole of the ear plate, approximately symmetrically to the stayed cable. The stress value of each structural member in the anchorage zone appears greater in some area. The stress diffuses quickly and transfers smoothly. The carrying capacity of the anchorage zone meets requirements. It is suggested to adopt high-strength steel for the ear plate of the anchorage zone and to locally strengthen the circumambience of the pin hole.