确定预应力混凝土斜拉桥恒载初始索力的方法

在设计预应力混凝土（P.C.）斜拉桥时，确定斜拉索在恒载作用下的初始索力值是一项重要和困难的任务，设想用力的平衡概念导出一种以斜拉桥主梁为相应刚性支承连续粱产生的弯矩为目标的初始索力的确定方法，同时考虑预应力钢筋的作用，改进了以往常用的零位移法的一些不足之处，通过实例计算表明该方法是实用和有效的

Optimization of Initial Cable Forces in Prestressed Concrete Cable-stayed Bridges

The detemination of initial cable forces in a prestressed concrete cable-stayed bridge under its dead loadis an important but difficult task that affects the overall design of the bridge. A new method utilizing the idea of forceequilibrium is presented in this paper for their determination The method can easily account for the effect of prestressing as well as the additional bending moments due to the verical profile of the bridge deck. It is much more rationaland simpler than the traditional "zero displacement" method, and it is able to achieve bending moments in the bridgedeck approaching those in a continuous beam over rigid simple supports.