混凝土斜拉桥合理成桥状态确定的分步算法

Step-by-step arithmetic for the reasonable finished dead state of the concrete cable-stayed bridges

在现有的最小弯曲能量法、影响矩阵法和应力平衡法等方法的基础上 ,提出了斜拉桥合理成桥状态确定的分步算法。基本思路是 :先用最小弯曲能量法初定成桥状态 ;然后以应力平衡法确定主梁合理预应力和主梁成桥恒载弯矩“可行域”;最后用影响矩阵法确定综合考虑主梁、塔和索等结构受力要求的合理成桥状态。

The step-by-step arithmetic for the reasonable finished dead state of the concrete cable-stayed bridges is proposed on the basis of minimum bending energy method, influence matrix method and stress balancing method. The basic ideology is: at first, deciding initial dead state using minimum bending energy method; then deciding the reasonable prestressing quantity in the main beam and the relative reasonable limits of dead moments using stress balancing method; in the last, the reasonable finished dead slate of the total structure is determined by influence matrix method, considering the equality requests of cable forces, the bending demands of the main beam and towers, the requests of the supporting forces of side piers or assistant piers etc.