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随着高强钢在工程实践中越来越广泛的应用,国内外很多专家学者越来越重视对高强钢钢结构的研究.目前国内的变电构架中,使用的钢材最高强度等级为Q420,与Q690尚有一定差距.在采用高强度钢材的情况下,构件的截面尺寸相对较小,压杆的稳定将是结构承载力最为重要的影响因素.现行《钢结构设计规范》(GB50017-2003)中给出的受压柱稳定系数是根据较低强度钢材试验结果得出的,与高强度钢材的柱子曲线存在一定的差异.为了使Q690高强钢管的受压稳定计算符合实际,对Q690高强圆钢管的轴压承载力进行了足尺试验研究,以为其工程设计提供科学依据.
With the application of high strength steel in engineering more and more widely, many experts and scholars at home and abroad pay more and more attention to the research of high strength steel structure.At present, the highest strength grade of steel used in substation structure in China is Q420 and Q690 There is a certain gap in the case of high-strength steel, the cross-sectional size of the component is relatively small, the stability of the strut will be the most important structural bearing capacity of the influencing factors of the current “Code for Design of Steel Structures” (GB50017-2003) The stability coefficient of the column under compression is obtained based on the test result of the lower strength steel, which is different from the curve of the column of the high-strength steel.In order to make the calculation of the stability of the compression of Q690 high-strength steel pipe in line with the actual situation, Of the axial compression capacity of a full-scale test study to provide a scientific basis for its engineering design.