【摘要】 本文介绍了7根L形钢管混凝土柱试件在承受常轴力和水平荷载作用下的试验研究。试验中考虑了不同的轴压比、内部有无加劲和加载方式对试件抗震性能的影响,试验结果表明,内部加劲能够明显地延缓柱子钢板的屈服,而且柱子的耗能能力和延性也有较好的改善。最后通过编写计算程序,对L形钢管混凝土柱的荷载-变形进行了全过程分析,考察了常用的方钢管混凝土柱的钢材和混凝土的本构关系对L形钢管混凝土柱纤维模型数值分析的适用性,计算得到的弯矩-轴力-曲率关系和荷载-位移关系与试验结果吻合较好。更多还原

【Abstract】 An experimental investigation on hysteretic behavior of seven concrete-filled L-section steel column specimens subjected to lateral load and constant axial load is introduced. The effects of different axial compression force ratios, inner stiffeners, and way of loading have been studied. The results show that the inner stiffeners can obviously postpone the buckling of steel plate, and improve energy dissipation and ductility behaviors of the members. Furthermore, in order to test the feasibility of numerical method and select appropriate constitutive relations of steel and concrete, the numerical method is adopted to analyze the load-displace behavior. The results obtained by the calculation are in good agreement with that obtained by experiments.更多还原