Abstract: In order to determine the reasonable cable force of tied arch bridge, the improvement and optimization of the algorithm was realized by improving the inertia weight of particle swarm intelligence optimization algorithm. The objective function of the cable was obtained by combining the optimization objective with the influence matrix principle. Then, the proposed algorithm was combined with the objective function by using the finite element and numerical analysis software to realize the automatic adjustment of the suspender and cable forces, which achieved the purpose of reasonable stress and uniform linear shape of the completed state of the arch bridge. The optimization results show that applying the improved particle swarm optimization algorithm to solve the cable force of tied arch bridge can achieve the effect of fast convergence, reasonable cable force and error within the allowable range. The proposed method provides an efficient solution scheme for cable force calculation in practical construction control.

Key words: bridge engineering; cable force adjustment; improved particle swarm algorithm; influence matrix; tied arch bridg

摘要： 为确定系杆拱桥的合理成桥索力，通过对粒子群智能优化算法的惯性权重加以改善从而实现对算法的改进优化，将优化目标结合影响矩阵原理得到调索的目标函数，使用有限元和数值分析软件将算法与目标函数结合从而实现吊杆索力的自动调整，进而使拱桥成桥状态达到受力合理、线形均匀的目的。优化结果表明：将改进后的粒子群算法应用于系杆拱桥的索力求解中，能够达到收敛速度快、索力合理、并使误差落在允许范围内的效果，为实际施工控制中索力计算提供了一种高效的求解方案。

关键词: 桥梁工程；索力调整；改进粒子群算法；影响矩阵；系杆拱桥