双管圆形钢管混凝土深梁的力学性能

双管圆形钢管混凝土构件(CFDST)具有由共圆心的2个圆形钢管间填充混凝土组成的中空截面。因此,CFDST构件比一般的实心钢管混凝土(CFT)构件轻。本文的目的是通过三点静力荷载试验研究CFDST深梁在弯剪作用下的力学性能。考虑了内外管径比(Di/Do)和外管径厚比(Do/to)两个参数的影响。结果表明:失效模式由参数Di/Do控制。Di/Do小于0.47构件的试验强度与预估值能较好地吻合。另外,讨论了双管在平面应力条件下的双轴弹塑性应力历程。

Mechanical Behavior of Concrete Filled Double Skin Tubular Circular Deep Beams

Concrete filled double skin circular tubular member(CFDST) has a hollowed section consisting of double concentric steel tubes with concrete fill in between their walls.The CFDST members are consequently lighter than ordinary concrete filled tubular members(CFT) which have solid sections.The purpose of this study is to investigate the mechanical behavior of CFDST deep beam under a combined action of shear and bending through a three points static loading test.Two testing parameters were considered,namely,the...