建筑结构钢材Q390GJD的焊缝连接疲劳性能试验研究  

Fatigue test of structural steel Q390GJD welded connections

作　　者：施刚[1] 张建兴[1] 

机构地区：[1]清华大学土木工程系,土木工程安全与耐久教育部重点实验室,北京100084

出　　处：《四川建筑科学研究》2014年第3期218-223,共6页Sichuan Building Science

基　　金：铁道部科技研究开发计划项目(2012G011-E)

摘　　要：以Q390GJD钢为材料制作了磨光焊缝连接和原状处理焊缝连接的板材试件,采用高频试验机进行常规轴向拉伸疲劳试验。试验结果发现:本文试验中的Q390GJD钢焊缝连接试件的疲劳试验结果具有非常大的离散性。由钢结构设计规范得出的Q390GJD磨光焊缝连接试件在200万次下的疲劳强度比根据试验拟合曲线计算出的值要小。Q390GJD焊缝连接试件由于焊缝的处理不同,疲劳强度有很大差异。A number of axial tensile fatigue tests were conducted under high frequency fatigue machine. During the tests, Q390GJD plate specimens with polished and original welded connections were used. The test results showed that the discreteness of the fatigue strength was fairly great. The fatigue strength of Q390GJD welded connections under 2 million times loading was greater than the corresponding value calculated according to the steel design code. The fatigue performance of these welded connections with different treatment has large difference.

关 键 词：建筑结构钢材 疲劳 钢结构 焊缝连接 S-N曲线 

分 类 号：TU311.2[建筑科学—结构工程]