Concrete-filled circular steel tubes subjected to pure bending
Concrete-filled circular steel tubes subjected to pure bending
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DOI：
10.1016/s0143-974x(01)00035-9
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发表时间：
2001-11-01
影响因子：
4.1
通讯作者：
Grzebieta, RH
中科院分区：
文献类型：
--
作者：
Elchalakani, M;Zhao, XL;Grzebieta, RH
目前的设计规范和标准提供的圆形钢管混凝土（CFT）的弯曲性能的信息很少，因为有很少的实验研究。对于受弯钢管混凝土，不同规范中推荐的d/t限值存在显著差异。本文对d/t = 12 ~ 110的圆钢管混凝土在大变形纯弯作用下的抗弯性能进行了试验研究，并对空、空、冷成型圆钢管混凝土在纯塑性弯曲作用下的性能进行了比较。结果表明，当d/t小于或等于40时，孔洞填充阻止了大旋转时的局部屈曲，而当d/t为74时，在非弹性范围内形成了多个塑性波纹
Current design codes and standards provide little information on the flextural behaviour of circular concrete filled tubes (CFT) as there have been few experimental studies. There are significant differences in d/t-limits recommended in various codes for CFT under bending. This paper presents an experimental investigation of the flexural behaviour of circular CFT subjected to large deformation pure bending where d/t = 12 to 110, The paper compares the behaviour of empty and void-filled, cold-formed circular hollow sections under pure plastic bending. It was found that for the range of d/t less than or equal to 40, void filling prevented local buckling for very large rotations, whereas multiple plastic ripples formed in the inelastic range for specimens with 74