超长距离顶推施工导梁屈曲分析研究
Buckling Analysis of Guide Beams in Super Long-distance Incremental Launching Construction
张光英 1王东伟 2李佳莉 3唐宾朋 4刘英棨 4张谢东4
作者信息
- 1. 武汉理工大学交通与物流工程学院 武汉 430063;中国交通建设股份有限公司江苏分公司 南京 211800
- 2. 中交一公局集团有限公司 北京 100024
- 3. 中国市政工程中南设计研究总院有限公司 武汉 430010
- 4. 武汉理工大学交通与物流工程学院 武汉 430063
- 折叠
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.
Abstract
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 soft-ware,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 inspec-ted frequently to ensure the stability of the guide beam section in the super-long distance jacking con-struction.
关键词
钢混组合梁/导梁/屈曲响应/焊缝失效/长距离顶推Key words
steel-concrete composite deck/guide beam/buckling response/welding failure/long-dis-tance incremental launching construction引用本文复制引用
出版年
2024
NETL
NSTL
万方数据