南京工业大学学报（自然科学版）2025，Vol.47Issue(6)：691-698,8.DOI:10.3969/j.issn.1671-7627.2025.06.009
基于总应变能最小化的异形钢拱塔斜拉桥索力优化
Cable force optimization of a cable-stayed bridge with an irregular steel arch tower based on total strain energy minimization
摘要
Abstract
A major challenge in the design of cable-stayed bridges is determining the optimal cable forces for a reasonable completion state.This study applies the influence matrix method to address the complex load-transfer behavior of cable-stayed bridges with irregular steel arch towers.The optimization uses an objective function defined as the sum of the bending strain energy and shear strain energy of the main girder-tower system,together with the axial strain energy induced by the stay cables.The constraints are the vertical displacement of the main girder at the anchorage point and the longitudinal displacement at the tower top.Based on these conditions,the cable forces of an irregular steel arch tower cable-stayed bridge are optimized,and the corresponding changes in bending moment,displacement,and stress before and after optimization are examined.The results show that the optimized cable forces are close to the design values,with deviations within 4％.After optimization,the bending moments,displacements,and stresses under dead load decrease to varying degrees.The distribution of bending moments of the bridge structure becomes more uniform,the local geometry and internal force conditions improve,and the overall status of the structure is closer to a reasonable completion state.This method provides an effective tool for cable force optimization in irregular cable-stayed bridges with irregular steel arch towers and offers a comprehensive way to evaluate their global structural performance.关键词
异形斜拉桥/索力优化/影响矩阵法/合理成桥状态Key words
irregular cable-stayed bridge/cable force optimization/influence matrix method/reasonable completion state分类
交通工程引用本文复制引用
孙珊忠,张三头,程浩,赖韬,王俊..基于总应变能最小化的异形钢拱塔斜拉桥索力优化[J].南京工业大学学报（自然科学版）,2025,47(6):691-698,8.基金项目
江苏省建设系统科技项目(2021ZD05) （2021ZD05）
南京市建设系统科研计划(Ks2025) （Ks2025）
