建筑钢结构进展2018，Vol.20Issue(1)：64-72,9.DOI:10.13969/j.cnki.cn31-1893.2018.01.008
不同材料内管的圆中空夹层钢管混凝土构件轴压性能研究
Study of Circular Concrete-Filled Double Skin Steel Tubes with Different Materials of Inner Tube under Axial Compression
摘要
Abstract
Five circular concrete-filled double skin steel tubes (CCFDST) are made to study the mechanical behavior of CCFDST with different materials of inner tube.Three types of inner tubes,steel,PVC and PPR,are included.All specimens are under axial compression,and the failure modes about whole and internal,load-longitudinal strain curves,average stress-strain curves and the developing regularities of lateral strain are analyzed.The whole process of axial compression of five specimens are simulated using the finite element (FE) software ABAQUS.Compared with the inner steel tube specimen,diagonal buckling on PVC tube and PPR tube are more significant when the specimens are destroyed,and it has lower ultimate bearing capacity,elastic modulus,as well as lower ductility.The lateral strain of CCFDST with PVC tube is developed much faster than other specimens.The stiffness in earlier stage of all specimens and the ultimate bearing capacity of CCFDST with steel tube calculated by FE model are in a good agreement with those measured from experiments.PVC tube and PPR tube only undertake little axial load in the whole process compared with steel tube,and the interaction with sandwich concrete is negligible.CCFDST with PVC tube cannot be used in load bearing structures,but CCFDST with PPR tube can be used in engineering practices.关键词
内管/圆中空夹层钢管混凝土/PVC管/PPR管/有限元/轴压试验Key words
inner tube/CCFDST/PVC tube/PPR tube/FEM/axial compression test分类
建筑与水利引用本文复制引用
黄宏,朱彦奇,郭晓宇,陈梦成..不同材料内管的圆中空夹层钢管混凝土构件轴压性能研究[J].建筑钢结构进展,2018,20(1):64-72,9.基金项目
国家自然科学基金(51378206,51008122),江西省青年科学基金计划(20143ACB21020) （51378206,51008122）
