索力优化是系杆拱桥吊杆更换的一项重要工作,选择合适的索力优化方法有利于吊杆更换后的桥梁运营安全。本文推导了系杆拱桥的索力影响矩阵,以施调索力的安全范围为隐性约束条件,采用索力最大偏差最小法的索力优化方法,以某系杆拱桥为工程背景对其索力进行优化计算。结果表明:优化后的索力均匀、结构受力合理、线形平顺,说明本文方法具有较好的应用前景。 The optimization of cable force is an important task to replace the boom of the tied arch bridge. Choosing the appropriate method of cable force optimization is beneficial to the operation safety of the bridge after the boom is replaced. In this paper, the cable force influence matrix of tied arch bridge is deduced, and the safety range of cable tension force is implicitly constrained. The cable force optimization method with the minimum cable force maximum deviation method is adopted. Taking a tied arch bridge as the engineering background, Force optimization calculation. The results show that the optimized cable force is uniform, the structure is reasonable and the line is smooth, which shows that this method has good application prospect.