【作者】 何明胜； 刘新义；

【Author】 HE Ming-sheng LIU Xin-yi (School of Water Conservancy & Architecture Engineering,Shihezi University,Shihezi,832000,China)

【机构】 石河子大学水利建筑工程学院；

【摘要】 介绍了6种以套箍系数ζ为控制因素的6组,共16根薄壁方钢管轻骨料混凝土短柱的轴压实验结果,考虑冷弯效应、管壁的有效宽度计算推导了核心混凝土的提高系数表达式 K_C 对 Popoviesr 提出的约束混凝土的本构方程式进行修正,获得核心轻骨料混凝土的本构关系.通过数值计算对薄壁方钢管轻骨料混凝土短桂的轴力-应变全过程进行分析的构件的全过程曲线.与实验结果比较吻合较好.在上述基础上提出了轴压承载力的简化计算方法,取得令人满意的计算结果.更多还原

【Abstract】 The tested result of 16 lightweight aggregate concrete-filled thin-walled steel box columns (SLSCT) under axial compression is introduced.The improving modulus K_C is derived considering the effect of the cold curved effect and the effective width.A mechanical model for the concrete filled square steel tubular stub columns is proposed in the paper by amended the equation that were established by Popovics.The theoret- ical results are in good agreement with that of the test.A simplified method is derived based on the model. Comparisons are made between the simplified method and the experiment results also show that the simplified method is reliable and feasiblel.更多还原