焊接孔对波纹钢腹板梁力学性能的影响  

Influence of Weld Access Hole on Mechanical Properties of Corrugated Web Girders

作　　者：胡晓龙[1] 王清远[1] 谭莲飞[1] 

机构地区：[1]四川大学能源工程安全与灾害力学教育部重点实验室建筑与环境学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2013年第S1期31-37,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家杰出青年基金资助项目(10925211);深圳市科技资助项目(JC200903130339A)

摘　　要：通过对设置焊接孔的Q345c高强钢波纹钢腹板梁进行疲劳试验、静力试验和3维有限元分析,主要目的是研究焊接孔对高强波纹钢腹板梁力学性能的影响,并且通过有限元模拟对设置有焊接孔的波纹钢腹板梁进行几何参数分析。试验梁通过岛津4890疲劳试验机采用3点弯曲加载方案,在加载至60×104次疲劳循环后,梁跨中部右侧的焊接孔处出现微裂纹,继续加载至128.84×104循环周次,最终在前期未发现裂缝的焊接孔处发生断裂破坏。通过试验现象和有限元分析表明:焊接孔对波形钢腹板钢梁的应力集中影响较大;波纹钢腹板梁几何尺寸的变化使焊接孔处波纹钢腹板梁的力学性能的改变有明显的影响。The influence of weld access hole on fatigue of Q345c steel corrugated web girders was studied by fatigue test,static test and three-dimensional finite element stress analysis.The work was tested by Shimadzu 4890 fatigue testing machine.During the experiment,the fatigue test was carried out by three-point bending.The experimental phenomena and finite element analysis showed that the stress concentration occurs at the weld access hole of girder with corrugated steel web,and geometry changes have a significant effect on the mechanical properties of the corrugated steel web beams.

关 键 词：焊接孔 波纹钢腹板梁 力学性能 疲劳 有限元分析 

分 类 号：U441[建筑科学—桥梁与隧道工程]