预应力锚索格构梁工作阶段格构内力计算方法

Discussion on calculation method of internal force of the prestressed anchor lattice beam in working stage

在预应力锚索格构梁工作阶段,锚索被动发生拉伸变形,变形值主要与锚索的自由段长度、锚索的弹性模量、锚索的截面面积有关,与这三个因素有关的系数称为锚索的柔度系数C i。锚索简化为作用在格构梁上的弹性支座,格构梁作为固定在弹性支座的连续梁,受力体系的基本结构为多跨弹性支座上的连续梁。

In the working stage of the prestressed anchor lattice beam,the anchor is passively stretched and deformed.The deformation value is mainly related to the length of the free section of the anchor,the elastic modulus of the anchor,and the cross-sectional area of the anchor.The coefficient of these three factors is called the C i flexibility coefficient.The anchor is simplified as an elastic support acting on the lattice beam.The lattice beam is simplified as continuous beam fixed on the elastic support.The basic structure of the force system is simplified as continuous beam on a multi-span elastic support.