Load-Strain Model for Steel-Concrete-FRP-Concrete Columns in Axial Compression
Load-Strain Model for Steel-Concrete-FRP-Concrete Columns in Axial Compression
复制标题
轴压钢-混凝土-FRP-混凝土柱的荷载-应变模型
DOI：
10.1061/(asce)cc.1943-5614.0000664
复制
发表时间：
2016-10-01
影响因子：
4.6
通讯作者：
Ye, Lie Ping
中科院分区：
文献类型：
--
作者：
Cheng, Shi;Feng, Peng;Ye, Lie Ping
摘要提出了钢-混凝土-玻璃钢-混凝土(SCFC)混杂柱受压截面的荷载-应变模型。截面布置为外层为方形钢管，内层为圆形纤维增强聚合物(FRP)管，在这两层之间和FRP管内填充混凝土。因此，该截面可视为FRP约束混凝土核心的钢管混凝土(CFST)，其实质是截面形状的FRP管混凝土(CFFT)。然而，SCFC的力学性能优于钢管混凝土和钢管混凝土的简单叠加，而不考虑不同材料之间的相互作用机理。SCFC的荷载-应变行为不同于CFST或CFFT，因为它包括初始抛物线部分、第二线性部分和峰后部分。该模型是通过叠加四个组成层的载荷-应变模型来建立的，并试图揭示其力学响应。
AbstractA load-strain model for a steel-concrete-FRP-concrete (SCFC) hybrid column section in compression is proposed. The section layout has a square steel tube as the outer layer and a circular fiber-reinforced polymer (FRP) tube as the inner layer, and concrete is filled between these two layers and inside the FRP tube. Thus the section can be regarded as a concrete-filled steel tube (CFST) with a FRP-confined concrete core (FCCC), in which the FCCC is essentially a concrete-filled FRP tube (CFFT) in sectional configuration. However, the mechanical behavior of a SCFC is superior to the simple superposition of CFST and CFFT without consideration of the interaction mechanisms among the different materials. The load-strain behavior of a SCFC differs from that of a CFST or CFFT in that it includes an initial parabola portion, a second linear portion, and a postpeak portion. The model is established by superposing four load-strain models of the constituent layers and attempting to reveal the mechanical resp...