河北工业科技2025，Vol.42Issue(6)：530-537,8.DOI:10.7535/hbgykj.2025yx06005
非对称曲线连续刚构桥合龙顶推力优化
Optimization of closure jacking force of asymmetric curved continuous rigid frame bridges
摘要
Abstract
In order to study the mechanical properties and displacement response of an asymmetric curved continuous rigid-frame bridge,and ensure reasonable stress and deformation during operation,the asymmetric closure jacking force was determined via quadratic programming by using the sum of squares of longitudinal and transverse horizontal displacements at the pier top 10 years after completion as the objective function,and the pier top and bottom stresses during construction and the transverse displacement difference across the closure segment as the constraints.Based on an actual bridge project,the closure jacking force was optimized and analyzed under three conditions:no jacking force,unoptimized jacking force,and optimized jacking force.The results demonstrate that the optimized jacking force significantly improves bridge alignment and internal force distribution,effectively restraining pier displacements-longitudinal displacements are kept below 3 mm,and transverse displacements are reduced by 29.4%.Additionally,stress distribution at the pier top and bottom becomes more uniform during operation by optimizing the stress state of the bridge pier.The proposed quadratic programming method is effective,and the resarch results can provide a theoretical basis for the design of the closure jacking forces in similar bridge projects.关键词
桥涵工程/非对称曲线连续刚构/不对称合龙顶推力/二次规划Key words
bridge and culvert engineering/asymmetric curved continuous rigid structure/asymmetric closure jacking force/quadratic programming分类
交通工程引用本文复制引用
覃志科,黄成岑,马泽理,邬晓光,杨怀盼..非对称曲线连续刚构桥合龙顶推力优化[J].河北工业科技,2025,42(6):530-537,8.基金项目
广西重点研发计划科技发展专项(2024AB15010) （2024AB15010）
