建筑结构学报2013，Vol.34Issue(2)：106-112,7.
热成型不锈钢圆管混凝土轴压短柱受力性能试验研究
Experimental study on axial compressive behavior of concrete-filled thermoforming stainless steel tubular stub columns
摘要
Abstract
This paper presents an experimental study on axial compressive behavior of concrete-filled thermoforming stainless steel tubular ( CFTSST) stub columns. Seventeen specimens of CFTSST stub columns with different parameters were tested under axial compression. The parameters in the study included the compressive strength of concrete ( C30 and C40) ,wall thickness of thermoforming stainless steel t (0. 9 mm,l. 0 mm,l. 2 mm) and height-diameter ratio of specimens A (3.0, 3.5 and 4.0). This paper presents test procedure, specimens failure phenomena, load-axial displacement curves, load-circular strain curves and load-axial strain curves. Based on the failure phenomena, all specimens were divided into 5 failure modes. The effects of t and A on compressive ultimate capacity, ductility and stiffness were investigated. The results of tests show that the stress of specimens increases greatly at the end of the yield stage; as value of t increases, compressive ultimate capacity, ductility and stiffness of specimens increase; as value of A increases, ductility increases, stiffness decreases; the value of compressive ultimate capacity gets maximum when the value of λ is 3. 5, it is lower when A is 4. 0,gets minimum when A is 3. 0; according to the comparisons between CFTSS tubular stub columns and concrete-filled steel tubular stub columns, the results show that the restraint amplification coefficient of CFTSS tubular stub columns is higher.关键词
不锈钢圆管混凝土轴压短柱/静力试验/轴压性能/轴压承载力/破坏模式Key words
concrete-filled thermoforming stainless steel tubular (CFTSST) stub columns under axial force/ static experiment/ axial property/ axial capacity/ failure mode分类
建筑与水利引用本文复制引用
陈誉,李凤霞,王江..热成型不锈钢圆管混凝土轴压短柱受力性能试验研究[J].建筑结构学报,2013,34(2):106-112,7.基金项目
国家自然科学基金项目(51008133,51278209),福建省自然科学基金计划项目(2012J01219). （51008133,51278209）
