焊接方式对负载下加固工形截面钢梁残余变形影响的试验研究  

EXPERIMENTAL STUDY ON THE INFLUENCE OF WELDING PROCESSES ON THE RESIDUAL DISTORTION OF REINFORCING I-SECTION STEEL BEAMS UNDER LOAD

作　　者：黄健鸣 王元清[1] 宗亮[2] 张亚伟 HUANG Jian-ming;WANG Yuan-qing;ZONG Liang;ZHANG Ya-wei(Department of Civil Engineering,Tsinghua University,Key Laboratory of Structural Engineering and Vibration of China Education Ministry,Beijing 100084,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]清华大学土木工程系,清华大学结构工程与振动教育部重点实验室,北京100084 [2]天津大学建筑工程学院,天津300350

出　　处：《工程力学》2021年第S01期243-250,共8页Engineering Mechanics

基　　金：《钢结构加固设计规范》国家标准管理组科研专项课题项目(2013-04)。

摘　　要：为研究负载下焊接加固方式对受弯钢梁焊接残余变形的影响,该文对4根Q345B焊接工字形受弯钢梁进行了负载下的焊接加固试验研究。该4根钢梁考虑工程实际采用了四种不同的焊接加固方式。试验中测量了焊接全程中的钢梁跨中挠度与跨中上下翼缘的侧向挠度变化过程。该文对该试验中遇到的一些特殊问题以及试验现象进行了解释,分析了焊接方式对跨中挠度以及跨中转角的影响,并对比了焊接残余挠度的规范计算值与试验值,以期对负载下焊接加固试验的进行提供经验,对焊接加固方式对焊接残余变形发展的影响有更加清晰的认识,为负载下焊接加固钢梁的试验方法和设计方法提供试验依据和建议。To study the influence of different welding processes on the residual deformation of flexural steel beams under load,we carried out welding strengthening test of four Q345B I-shaped bending steel members under load.The welding processes of the four steel beams are designed considering engineering applications.The changes of the mid-span deflection of the steel beams and the lateral deflection of the upper and lower mid-span flanges during the whole welding process were measured.This paper explains some special problems and test phenomena in the test,analyzes the influence of the welding processes on the mid-span residual deflection and mid-span rotation angle,and compares the calculated and experimental values of the welding residual deflection.The aims are to provide experience in conducting welding reinforcement test,to better understand the influence of welding process on the development of welding residual deformation,and to provide experimental basis and suggestions for the test design and design methods of welded steel beams under load.

关 键 词：负载 焊接加固 受弯钢梁 焊接方式 残余变形 

分 类 号：TU391[建筑科学—结构工程]