摘要
为研究T型连接接头疲劳性能,设计了5个不同几何参数的T型连接试件进行疲劳试验。通过对不同试件应力、断口宏观和金相分析,并与有限元模拟分析比照,得到各试件螺栓拉力变化以及疲劳过程中关键点的应力变化曲线等。结果表明:改变螺栓位置对试件破坏形态影响较大,但对试件的疲劳寿命影响较小,而翼缘板厚度的增加,使翼缘板在疲劳荷载下的变形逐渐减小,疲劳寿命大幅增加。
High strength bolted end plate connection is one of the most widely used connection joints.In order to study the fatigue performance of T joint,5T-shaped connection specimens with different geometric parameters were designed for fatigue test.Through the stress analysis,fracture macro analysis and metallographic analysis,and the comparison with finite element simulation analysis,the stress change curves of bolts and the key points in fatigue process were obtained.The results showed that the change of bolt position had a great influence on the failure modes of the specimens,but the effect on fatigue life was small.Increasing the thickness of flange,flange deformation under fatigue loading decreased gradually,while the fatigue life increased significantly.
作者
丁北斗
李雁
王宁
石寅晶
DING Beidou;LI Yan;WANG Ning;SHI Yinjing(Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering,Xuzhou 221116,China;School of Civil Engineering,Xuzhou University of Technology,Xuzhou 221018,China;National Space Frame and Steel Structures Quality Supervision and Inspection Center,Xuzhou 221006,China)
出处
《工业建筑》
CSCD
北大核心
2018年第11期175-181,共7页
Industrial Construction
基金
江苏省水利科技项目(2017020)
徐州市科技局社会发展项目(KC16SG270)
关键词
T型接头
疲劳试验
断口分析
金相分析
T-shaped connection
fatigue test
fracture macro analysis
metallographic analysis
