考虑封闭效应的钢管混凝土的轴压承载力研究  

Axial compression bearing capacity researches for considering closed concrete filled steel tube

作　　者：欧阳洋[1] 贺冉[2] 陈伯望[2] 

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]湖南城市学院土木工程学院,湖南益阳413000

出　　处：《湖南科技大学学报（自然科学版）》2012年第3期48-51,共4页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：湖南省高等学校科学研究重点项目(10A017)

摘　　要：通过试验,获得2组不同类型的混凝土试件养护28 d后的强度以及1组由PVC管密封的混凝土的强度,将3组混凝土强度代入不同规范中求得不同的钢管混凝土轴压承载力,得出按规程AIJ(1997)算得的钢管混凝土的承载力与试验值偏差较大.通过比较用PVC管封闭的圆柱体混凝土和养护28 d后的圆柱体混凝土的强度,得出按封闭的混凝土强度求得的钢管混凝土承载力与试验值较接近,从而在规程AIJ(1997)中引入系数η得到考虑封闭效应的钢管混凝土承载力公式.Two different types consening 28 days in the experiment. of concrete specimen were made and their strength were gotten, through The date in formula of rules were used and the axial compression was gotten. According to the rules of AIJ （ 1997 ） much lower than the experiment value. the beating capacity of concrete filled Two kinds of concrete were compared, steel tube was calculated, which is one is closed by PVC pipe, and the other is conserved 28 days. the bearing capacity of CFST, which was calculated by strength of closed concrete, was close to the experiment value. At last, the coefficient ＂71＂ was introduced to modify CFST formula of bearing capacity in the rules of AIJ（1997）.

关 键 词：钢管混凝土 封闭的混凝土 轴压承载力 

分 类 号：TU502.6[建筑科学—建筑技术科学]