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利用修正的Ernst公式考虑吊索几何非线性,以影响矩阵法为理论基础,以目标索力差值和拱肋横向位移为双控制目标,采用以弯曲应变能最小为约束条件的最小能量法进行拱、弯梁与索空间组合结构的索力优化计算,约束最优方法求解出拱、弯梁与索空间组合结构的施调索力、最优调索顺序以及调索过程索力控制终值。结合世界上跨度最大的拱、弯梁与索组合结构的工程调索实例,利用有限元法实现了调索计算。结果表明,该方法所确定的调索张拉顺序、施调索力能够满足调索施工控制要求,最终成桥状态亦达到设计要求,为今后类似结构的调索工程提供了重要参考。
Considering the geometric nonlinearity of the sling using the modified Ernst formula, the influence of the matrix method is taken as the theoretical basis and the target force difference and the horizontal displacement of the arch rib are dual control targets. The minimum energy method with the minimum bending strain energy as the constraint condition The optimization of cable force and the optimization method of the space constraints of the arch, the curved beam and the cable space, the cable force, the order of the optimal cable retrieval and the final value of cable force control . Combined with the engineering example of the arch bridge, curved beam and cable combined structure, which has the largest span in the world, the calculation of cable transfer is realized by the finite element method. The results show that the sequence of tensioning and tensioning determined by this method can meet the requirements of cable laying construction control and the final bridge status also meets the design requirements, which provides an important reference for the future similar structure of cable laying project.