自锚式悬索桥受力设计分析

Analysis on the force design of self-anchored suspension bridge

自锚式悬索桥是一种特殊的悬索桥,以其固有的方式形成自平衡结构体系。其结构受力情况与普通的地锚式有所区别,通过有限元对自锚式悬索桥进行受力特性分析是常见的方法,但其只能得到特定的结果,无法提供给设计人员准确的参考,所以对自锚式悬索桥的计算方法进行研究是非常必要的。改变主塔高度、加劲梁抗弯刚度、主塔抗弯刚度,对主缆垂度变化量、加劲梁跨中挠度、吊索力等效膜张力的影响进行分析,总结出结构的受力变形和设计参数的变化规律,为以后的设计工作提供相应的参考。

Self-anchored suspension bridge is a kind of special suspension bridge,which forms a self-balanced structure system in its own way. Its structure stress distribution with the ordinary anchor block,through the finite element for the anchor mechanical characteristics analysis of suspension bridges is a common method,but its only specific results,unable to provide accurate reference for design personnel,so the anchor of suspension bridges is very necessary to study the calculation method. Change of main tower height,stiffening girder bending stiffness,bending stiffness,the main tower of the main cable sag variation,the stiffening girder span deflection,sling force equivalent membrane tension is analyzed,the influence of summed up the deformation and stress of the structure and the change law of design parameters,provide reference for future design work.