高强钢轴心受压钢管整体稳定性承载力试验研究及数值分析  

EXPERIMENTAL AND NUMERICAL INVESTIGATION OF AXIAL COMPRESSION HIGH STRENGTH STEEL TUBE

作　　者：郭咏华 李晓彦[2] 张斌 孙清[2] 

机构地区：[1]河南省电力勘测设计院,河南郑州450007 [2]西安交通大学土木工程系,陕西西安710049

出　　处：《工程力学》2013年第8期111-118,132,共9页Engineering Mechanics

摘　　要：该文对焊接高强钢管稳定性进行了试验研究及数值分析。首先对Q690钢材进行了材性试验,其次对不同长细比的18根Q690焊接钢管轴心受压构件进行了整体稳定性试验,采用割环法测量了焊接钢管残余应力的分布。在试验研究的基础上,采用逆算单元长度法编制了考虑初始缺陷的高强钢管轴心受压构件稳定性分析程序,分析了6种不同长细比高强钢管的稳定性承载力。在试验研究和数值分析的基础上提出了高强钢轴心受压构件稳定系数计算公式,给出高强钢轴心受压构件的稳定系数表。数值与试验结果及规范的对比分析表明,该文得到的高强钢管稳定系数-长细比曲线分布合理,可用于高强钢轴心受压构件的稳定设计。Experimental and numerical studies on the overall stability of welded high strength steel tubes are presented. First, tensile coupon tests were conducted to determine the material properties of the test specimens. Then, eighteen axial compression columns were tested with different slenderness ratios. Meanwhile, the measurements of the residual stress distribution of welded steel tubes were completed with the cutting ring method. Based on these experimental studies, the inverse calculation segment length method considering initial imperfection is adopted to analyze the overall stability of axial compression members. The procedures based on the inverse calculation segment length method have calculated the critical capacity of the steel tubes with six slenderness ratios. On the base of the experimental study and numerical calculation, a stability coefficient formula of axial compression members of the high strength steel is proposed, along with the stability coefficient table of axial compression members of the high strength steel. The experimental and numerical results are compared with the values relying on specifications and a good agreement is observed, so that the calculated results （stability coefficient-slenderness ratio curve） can be considered to provide design assistance for high strength steel members.

关 键 词：高强钢管 残余应力 稳定性 极限承载力 逆算单元长度法 

分 类 号：TU391[建筑科学—结构工程]