自锚式悬索桥吊索与钢箱梁锚固区的局部应力分析

Local Stress Analysis of Anchor Cable and Steel Box Girder Anchorage Zone of Self-anchored Suspension Bridge

吊索锚固结构是自锚式悬索桥中的关键节点,锚固结构一般采用锚箱式、锚管式和销铰式等连接方式,受力状态复杂,局部应力集中现象突出,依靠平面杆件计算软件难以模拟实际复杂的应力状态,通常采用有限元建模分析的方法进行计算,本文以一座自锚式悬索桥吊索锚固结构为研究对象,利用空间有限元程序MIDAS/civil建立锚固结构的三维模型,通过三维空间模型对锚固结构进行细部分析。

Sling anchorage structure is the anchor of key nodes of suspension bridges. The anchoringstructure generally uses anchor box, anchor pipe type, and pin hinge type connection mode. The stress stateis complex and the local stress concentration phenomenon is outstanding. It is difficult to simulate the actual complex stress state relying on the flat bar calculation software. Therefore, it is usually calculated by themethod of finite element modeling. In the article, by taking an anchor cable anchorage of suspensionbridges structure as the research object, the use of the space finite element program MIDAS/civil anchoragestructure of threedimensional model is established. The detailed analysis is conducted through the threedimensional model of anchorage structure.