Q550高强度钢焊接H形柱轴心受压承载力试验研究  

Experimental Study on Axial Compression Capacity of Welding H-Shaped Q550 High-Strength Steel Columns

作　　者：邱林波[1,2,3] 侯兆新[1,3] 薛素铎[2] 刘毅[1,3] 陈水荣[1] 齐玉龙[1] 

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]北京工业大学建筑工程学院,北京100124 [3]国家钢结构工程技术研究中心,北京100088

出　　处：《建筑钢结构进展》2015年第3期7-12,18,共7页Progress in Steel Building Structures

基　　金：国家科技支撑计划(2012BAJ13B01)

摘　　要：高强度钢在钢结构工程中的应用可以促进科技进步,还可以带来显著的经济和社会效益,是钢结构工程发展和进步的必然趋势。为了推动Q550高强度钢在我国钢结构工程中的应用,首先研究了Q550钢材的力学性能。按照两种长细比设计了6个高强焊接H形柱试件,对其进行了轴心受压承载力试验,研究分析了Q550高强度钢焊接H形钢柱的轴心受压的极限承载力、荷载-位移曲线。对构件的承载力和稳定系数进行了理论和试验结果的对比分析。结果表明:Q550高强度钢焊接H形柱轴心受压破坏是失稳破坏,使用性能很好,试验承载力高于按照现行《钢结构设计规范》(GB 50017—2003)计算的值,试验得到的稳定系数也高于规范规定的值。Application of high-strength steel is one future trend of steel structures, because it brings significant social and economic benefits. In this paper, the mechanical properties of Q550 steel were studied firstly, for wider application of Q550 steel in civil infrastructures. Then six H-shaped columns made of Q550 high-strength steel were designed and tested with two slenderness ratios. The axial compression capacity and load-displacement curves of the columns were evaluated. Also the test results were compared with theoretical analysis results calculated using current design standards. The results indicate that the failure mode of H-shaped Q550 high-strength steel column is instability failure, but the overall performance of these columns is good. Also the stability coefficient and loading capacity of the columns are higher than those calculated using the current design standard.

关 键 词：高强度钢 焊接H形钢柱 长细比 轴心受压 承载力 稳定系数 

分 类 号：TU391[建筑科学—结构工程] TU392.1