Mechanical behavior of concrete filled double skin tubular circular deep beams
Mechanical behavior of concrete filled double skin tubular circular deep beams
复制标题
DOI：
10.1016/j.tws.2010.10.005
复制
发表时间：
2011-02
影响因子：
6.4
通讯作者：
Kojiro Uenaka;H. Kitoh
中科院分区：
文献类型：
--
作者：
Kojiro Uenaka;H. Kitoh
混凝土填充双层圆管构件（CFDST）是由两根同心钢管组成的空心截面，其墙壁之间填充混凝土。因此，CFDST成员比具有实体截面的普通混凝土填充管成员（CFT）更轻。本文通过三点静载试验，研究了CFDST深梁在剪切和弯曲共同作用下的受力特性。考虑两个测试参数，即内外径比（Di/Do）和外管径厚比（Do/to）。结果表明，得到的失效模式受Di/Do参数的控制。它们在比值小于0.47时的优势与本文提出的估计值相当一致。此外，还讨论了两根管在平面应力条件下的双轴弹塑性应力历程。
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 inner-to-outer diameter ratio (Di/Do) and the outer tube diameter-to-thickness ratio (Do/to). The results showed that the obtained failure modes were controlled by the parameter Di/Do. Their strengths for ratios of less than 0.47 fairly agreed with the estimation values proposed herein. Furthermore, biaxial elasto-plastic stress histories of both tubes under plane stress condition were also discussed.