薄壁圆钢管混凝土柱轴压极限承载力分析

Ultimate strength analysis to thin- walled circular concrete- filled steel tube column under axial compression

为了研究薄壁圆钢管混凝土柱轴压极限承载力是否适用CECS:2012《钢管混凝土结构技术规程》提供计算式,制作了不同壁厚(t=0.92、1.42、1.92 mm)、不同高度、不同钢管强度的9根圆钢管混凝土柱构件进行试验研究;试验结果表明薄壁圆钢管混凝土柱依然有很好的承载力及延性;对构件极限承载力对比发现,试验结果与按构件实际强度计算结果基本吻合,表明薄壁圆钢管混凝土柱轴压极限承载力依然适用《规程》提供计算式,且按《规程》提供计算式偏于保守,并根据试验结果对薄壁圆钢管混凝土柱的极限承载力取值进行了建议。

In order to study ultimate bearing capacity of the thin-walled circular steel tube concrete column is applicable CECS：2012“technical specification for concrete filled steel tubular”,it made of different thickness（t=0.92,1.42,1.92 mm）,different height,dif-ferent pipe strength experimental study of 9 root circular steel tube concrete column components,the test results show that concrete filled thin-walled steel tube columns are still bearing capacity and good ductility,load carrying capacity of members comparison,the experi-mental results are consistent with the calculated results according to actual strength member,that thin-walled circular steel tube con-crete column axial compression bearing capacity is still use the“rules”provides formula,and according to the“rules”provides the cal-culation formula on the conservative side,based on the experimental results and the limit ofconcrete filled thin-walled steel tube col-umns bearing capacity value ofsuggestion.