基于蚂蚁算法的连续刚构桥顶推力优化  

Optimization of Jacking Force of Continuous Rigid Frame Bridge Based on Ant Algorithm

作　　者：肖咏健 李新菊 杨静 亓祥宇 郝建云 宁晓骏[3] XIAO Yongjian;LI Xinju;YANG Jing;QI Xiangyu;HAO Jianyun;NING Xiaojun(Yunnan Highway Science and Technology Research Institute,Kunming 650051,China;Yunnan Aerospace Engineering Geophysical Detecting Co.,Ltd.,Kunming 650217,China;Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]云南省公路科学技术研究院,昆明650051 [2]云南航天工程物探检测股份有限公司,昆明650217 [3]昆明理工大学,昆明650093

出　　处：《现代交通技术》2024年第3期40-46,共7页Modern Transportation Technology

摘　　要：以大跨径高墩连续刚构桥为例,借助Midas Civil有限元软件建立模型,获取成桥25年墩顶水平位移、优化方程参数等数据,并对算法优化效果进行评价。程序算法以控制桥墩的最大拉应力、最大变形量与协同工作性能为指标,分析桥梁优化效果。研究结果表明:顶推力施工显著改善了桥墩变形;控制断面弯矩由无顶推力的13187.6 kN·m减小至1198.9 kN·m;复杂桥墩结构的刚构桥的最大拉应力控制断面不一定为墩顶或墩底断面;基于蚂蚁算法的方案可有效减小原设计的桥墩最大拉应力,使最大拉应力从2.19 MPa减小至1.58 MPa;方案可有效控制成桥墩顶的水平变形量,在减小最大拉应力的同时,使总变形量由40.17 cm减小至39.65 cm。Selecting a large-span high-pier continuous rigid frame bridge as an example,the data of pier-top horizontal displacement for 25 years and parameters of optimization equation are obtained by establishing models in Midas Civil,with which the algorithm optimization is evaluated.The program algorithm analyzes the effect of bridge optimization with indicators of controlling the maximum tensile stress,the maximum deformation and synergistic performance of the bridge piers.The study results show that the thrust construction has significantly improved the bridge pier deformation,for the control section bending moment is reduced from 13187.6 kN·m without thrust to 1198.9 kN·m,and the control section of the maximum tensile stress of the rigid-frame bridge with complex pier structure is not necessarily the top or bottom pier section.The method based on ant colony optimization algorithm can effectively reduce the originally designed maximum tensile stress of the bridge piers,which reduces the maximum tensile stress from 2.19 MPa to 1.58 MPa.And the method can effectively control the horizontal deformation of top-pier,reducing the maximum tensile stress while reducing the total deformation from 40.17 cm to 39.65 cm.

关 键 词：连续刚构 MATLAB 蚂蚁算法 顶推力优化 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]