基于抗震性能的连续刚构桥主梁参数优化  

Optimization of Continuous Rigid Frame Bridge Backbone Parameters Based on Seismic Performance

作　　者：周慧慧 陈艳萍 刘朝福 ZHOU Huihui;CHEN Yanping;LIU Zhaofu(School of Architectural Engineering,Kunming University of Science and Technology,Kunming 650001,China;Yunnan New Innovation Transportation Construction Co.,Ltd.,Kunming 650001,China;Traffic and Transportation Bureau of Lufeng City,Lufeng,650200,Yunnan,China;College of Architecture and Engineering,Yunnan Agricultural University,Kunming 650100,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650001 [2]云南新创新交通建设股份有限公司,昆明650001 [3]云南禄丰市交通运输局,云南禄丰650200 [4]云南农业大学建筑工程学院,昆明650100

出　　处：《科技和产业》2024年第17期341-346,共6页Science Technology and Industry

摘　　要：以昆明附近正在施工的一座连续刚构桥为研究对象,选取边中跨比、梁底效应曲线、0号块梁高和跨中梁高4个关键参数,通过建立25个不同参数组合的连续刚构模型,并利用ANSYS软件进行静力弹塑性分析(Pushover分析),采用正交试验的多目标函数优化方法,突破性地实现了基于抗震性能的优化结果。最终确定的最佳参数组合为:边中跨比值为0.6,梁底抛物线次数为1.6,0号块梁高为11.21 m,跨中梁高为4.75 m。这种优化方法在连续刚构桥梁设计中取得重要突破,不仅提高了结构的抗震性能,也为工程实践提供了可靠的指导,具有重要的工程实用价值和科学意义。Taking a continuous rigid-frame bridge under construction near Kunming as the research subject,edge span ratio,beam bottom effect curve,0 block beam height and span beam height four parameters are selected as variables.25 continuous rigid-frame models are established with different parameter combinations and utilizing ANSYS software for static pushover analysis.Through orthogonal test based on seismic performance optimization,it is found that the edge span ratio is 0.6,the number of beam base parabola is 1.6,0 block beam height is 11.21 m,cross the beam height is 4.75 m.This optimization approach represents a significant breakthrough in the design of continuous rigid-frame bridges,not only enhancing structural seismic performance but also providing reliable guidance for engineering practice,thus possessing important practical and scientific significance.

关 键 词：连续刚构桥 抗震性能 PUSHOVER分析 正交试验 

分 类 号：U443[建筑科学—桥梁与隧道工程]