摘要
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。
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.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第2期120-124,共5页
Journal of Tongji University:Natural Science
基金
国家科委攀登B计划资助!85-40
关键词
预应力混凝土
斜拉桥
初始索力
徐变
Prestressed concrete
Cable-stayed bridge
Initial cable force
Creep
