EXPERIMENTAL INVESTIGATION ON LONGITUDINAL RESIDUAL STRESS OF Q460 HIGH-STRENGTH STEEL WELDED H-SECTION MEMBERS
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摘要: 针对宝钢最新研发的高强度Q460钢材,采用钻孔应变释放法测试焊接H型钢纵向残余应力在截面上的大小及分布规律。同时,结合机械剥层的方式对纵向残余应力沿壁厚方向的分布规律进行试验考察。在试验测试结果的基础上,提出高强度Q460焊接H型钢的纵向残余应力分布的计算模型。Abstract: It was presented an experimental investigation on longitudinal residual stresses of welded H-sections fabricated from high-strength steel sheet with a nominal yield stress of 460 MPa,which was recently developed by Baosteel Group Corporation.Strain gage hole drilling method was used to measure the magnitudes and distributions of longitudinal residual stresses along the cross section.Furthermore,the measured points inside the thickness were stripped to the outer surface to measure the stresses along the thickness of the section.At last,a longitudinal residual stress pattern was proposed based on the test results obtained in this study for the Q460 welded H-sections.
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