为改善传统系杆拱桥吊杆内力优化方法耗时长、精度低、计算烦琐的缺点，本研究提出改进的CSO-ABC混合算法优化钢箱拱肋系杆拱桥吊杆内力。先建立CSO-ABC混合算法，改进侦察蜂阶段算法；再对3个测试函数进行数值试验，验证算法的精度和有效性。以某钢箱拱肋系杆拱桥为工程背景，通过ABAQUS-Python脚本进行CSOABC算法的吊杆内力自动优化计算。研究结果表明：改进的CSO-ABC算法与CSO算法和ABC算法相比，具有收敛速度快、精度高的优点；基于脚本的自动迭代，提高了吊杆内力优化的效率，该算法的吊杆内力最大优化幅度为 2.17%，在钢拱肋及混凝土主梁的应力峰值分别增大 4.9、0.8 MPa 的情况下，拱肋、主梁峰值位移分别减小 12.7、 12.1 mm，优化后的成桥状态与原始设计非常接近。该算法可为相关施工、监控、设计提供参考和借鉴。
In order to overcome the shortcomings of the traditional optimization method of the internal force of the suspender of the tied arch bridge，such as time-consuming，low accuracy，and complicated calculation，an improved CSO-ABC algorithm is proposed to optimize the internal force of the suspender of the tied-arch bridge with steel box arch-ribs. First，a hybrid CSO-ABC algorithm was established and the detection bee phase was improved，and three test functions were numerically tested to verify the accuracy and effectiveness of the algorithms. Then，taking the steel box tied-arch bridge as the engineering background，the finite element calculation of the CSO-ABC algorithm is carried out through the ABAQUS-Python script，and the automatic optimization of the internal force of the suspender based on the CSO-ABC algorithm is realized. The research results show that the improved CSO-ABC hybrid algorithm has the advantages of fast convergence and high precision compared with the independent CSO algorithm and ABC algorithm. The automatic iteration based on script greatly improves the efficiency of internal force optimization of the suspender. The maximum optimization range of the internal force is 2.17%. When the peak stress of the steel arch rib and the concrete girder increases by 4.9 MPa and 0.8 MPa，respectively，the peak displacement of the arch rib and the girder decreases by 12.7 mm and 12.1 mm，respectively. The optimized bridge state is very close to the original design. The algorithm can provide a reference for related construction，monitoring，and design work.