钢箱桁架拱桥V型墩受力分析与优化设计  

Analysis on stress and optimal design of V-shaped pier of steel box truss arch bridge

作　　者：李文文 关俊锋 黄梁 潘祥峰 韦建刚[2,3] 杨艳 LI Wenwen;GUAN Junfeng;HUANG Liang;PAN Xiangfeng;WEI Jiangang;YANG Yan(Nanchang Railway Survey and Design Institude Co.,Ltd.,Nanchang,Jiangxi 330000,China;College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China;College of Civil Engineering,Fujian University of Technology,Fuzhou,Fujian 350118,China)

机构地区：[1]南昌铁路勘测设计院有限责任公司,江西南昌330000 [2]福州大学土木工程学院,福建福州350108 [3]福建工程学院土木工程学院,福建福州350118

出　　处：《福州大学学报（自然科学版）》2022年第5期717-722,共6页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省高校产学研联合创新项目(2022H6009)。

摘　　要：以某钢箱桁架拱桥为背景,研究V型桥墩的力学性能.首先,基于MIDAS全桥模型最不利荷载工况下V构的边界条件,利用ABAQUS对局部模型进行受力分析;随后,以内外侧肢腿倾角比、V构矢高与墩座高度比为参数,分析V型墩最大应力变化规律;最后,对V构进行优化设计.研究表明:在承载能力极限状态下,墩座底部和外侧肢腿下缘产生了较大的拉应力;随着两种参数的增大,肢腿与墩座最大主拉应力呈现相反的变化趋势,而最大主压应力均趋于降低;结合分析所得,优化结构布置形式后,主要受拉部位主拉应力减小,安全储备提高.To study the mechanical properties of V-shaped piers,taking a steel truss arch bridge as the background.First by MIDAS whole bridge model under the most unfavorable load condition V structure of boundary conditions,analysis of the force of the local model of ABAQUS,the subsequent to V the ratio of high to,limb leg angle vector parameter,reveals the V pier maximum stress change rule,finally to V structure optimization design.The results show that in the limit state of bearing capacity,the bottom and the lower edge of the outer leg of the pier produce a large tensile stress.With the increase of the two parameters,the maximum principal tensile stress of leg and pier presents an opposite trend,while the maximum principal compressive stress tends to decrease.Combined with the analysis results,the main tensile stress of the main tension position is reduced and the safety reserve is improved after the structure layout is optimized.

关 键 词：V型墩 钢箱 桁架拱 空间应力 优化设计 

分 类 号：U445.559[建筑科学—桥梁与隧道工程] U441.5[交通运输工程—道路与铁道工程]