Behavior of Large-Scale Rectangular Columns Confined with FRP Composites
Behavior of Large-Scale Rectangular Columns Confined with FRP Composites
复制标题
DOI：
10.1061/(asce)cc.1943-5614.0000051
复制
发表时间：
2010-01-01
影响因子：
4.6
通讯作者：
Matthys, S.
中科院分区：
文献类型：
--
作者：
Toutanji, H.;Han, M.;Matthys, S.
本文的重点是轴向载荷，大型矩形钢筋混凝土柱约束与纤维增强聚合物（FRP）包裹。对具有不同长宽比和/或角半径的三种现场尺寸柱进行了应力-应变响应和极限荷载试验。研究了FRP横向有效破坏应变和增大围合作用对应力-应变特性的影响。现有的强度模型大多是针对小尺度试件开发的，用于预测结构响应。由于其中一些模型不能充分表征测试数据，另一些模型复杂且需要大量计算，因此开发了一个简单的面向设计的模型。该模型基于约束效能系数、展弦比系数和转角半径系数。该方法准确地预测了现有大型柱的轴向极限强度，并将其应用于其他研究人员研究的小型柱时，得出了合理的结果。
This paper focuses on axially loaded, large-scale rectangular RC columns confined with fiber-reinforced polymer (FRP) wrapping. Experimental tests are conducted to obtain the stress-strain response and ultimate load for three field-size columns having different aspect ratios and/or corner radii. Effective transverse FRP failure strain and the effect of increasing confining action on the stress-strain behavior are examined. Existing strength models, the majority of which were developed for small-scale specimens, are applied to predict the structural response. Since some of them fail to adequately characterize the test data and others are complex and require significant calculation, a simple design-oriented model is developed. The new model is based on the confinement effectiveness coefficient, an aspect ratio coefficient, and a corner radius coefficient. It accurately predicts the axial ultimate strength of the large-scale columns at hand and, when applied to the small-scale columns studied by other investigators, produces reasonable results.