矩形钢管高强混凝土压弯构件的实验研究

为了分析长细比、偏心率及含钢率对矩形钢管高强混凝土压弯构件力学性能的影响，进行了8根矩形截面钢管高强混凝土单向偏压构件的试验研究。结果表明：构件承载力随长细比和偏心率的增如逐渐降低；提高构件的含钢率可以减小跨中挠度；当构件含钢率低于8％时，达到极限承载力之前将发生局部失稳，试验结果同设计规程ECA、LRFD、AIJ计算结果的对比表明，规程LRFD和AIJ的计算结果偏于保守，规程ECA的计算结果和试验结果较为接近。

High strength concrete-filled RHS steel tubes subjected to eccentric loading

A total of 8 high strength concrete-filled rectangular hollow section ( RHS) steel tubes were tested when subjected to eccentric loading, and the primary test parameters were slenderness ratios (varied from 19. 4 to 39. 3) , steel ratios (8. 2% and 14. 2% ) , eccentricity ratios along major axis (varied between 0. 113 and 0. 412) , width to breadth ratios (1.3 and 1.6). The experimental results showed that the bearing capaci-ty decreased rapidly with the increasing of the slenderness ratio and the eccentricity ratio, and the local buck-ling of the wall of the steel section is evident when the steel ratio is below 8% . The numerical and experimen-tal results were in good agreement with each other.