摘要
以某UHPC钢混组合梁全断面超长距顶推施工项目为背景,针对前置导梁容易产生加劲隔板焊缝失效缺陷等问题,采用SOLIDWORKS并结合ABAQUS有限元软件,选取实际导梁前三节段建立局部导梁分析简化模型,基于可能出现的隔板失效模式,进行含缺陷导梁的屈曲响应分析.结果表明:局部模型第三根纵隔板失效对导梁稳定性影响最大,该缺陷导梁一阶屈曲特征值由3.36下降至2.31.顶推施工中应频繁对第三纵隔板,以及处于三、四纵隔板之间的上下横隔板进行焊缝质量与局部变形检验,确保超长距离顶推施工中导梁截面的稳定性.
On the background of a UHPC steel-concrete composite beam with full-section and super-long distance jacking construction project,the problems that the front guide beam is prone to weld failure of stiffening diaphragm are solved.Using SOLIDWORKS and ABAQUS finite element software,the first three sections of the actual guide beam were selected to establish a simplified model for local guide beam analysis,and the buckling response of the guide beam with defects was analyzed based on the possible failure modes of the diaphragm.The results show that the failure of the third mediastinal plate in the local model has the greatest influence on the stability of the guide beam,and the first-order buckling characteristic value of the defective guide beam decreases from 3.36 to 2.31.During the jacking construction,the weld quality and local deformation of the third mediastinal plate and the upper and lower diaphragms between the third and fourth mediastinal plates should be inspected frequently to ensure the stability of the guide beam section in the super-long distance jacking construction.
作者
张光英
王东伟
李佳莉
唐宾朋
刘英棨
张谢东
ZHANG Guangying;WANG Dongwei;LI Jiali;TANG Binpeng;LIU Yingqi;ZHANG Xiedong(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;China Communications Construction Company Limited,Nanjing 211800,China;CCCC Frist Highway Engineering Group Co.Ltd.,Beijing 100024,China;Central&Southern China Municipal Engineering Design and Research Institute Co,Ltd.,Wuhan 430010,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2024年第3期552-556,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
关键词
钢混组合梁
导梁
屈曲响应
焊缝失效
长距离顶推
steel-concrete composite deck
guide beam
buckling response
welding failure
long-distance incremental launching construction
