Axial compressive behavior of polyethylene terephthalate/carbon FRP-confined seawater sea-sand concrete in circular columns
Axial compressive behavior of polyethylene terephthalate/carbon FRP-confined seawater sea-sand concrete in circular columns
复制标题
DOI：
10.1016/j.conbuildmat.2019.117383
复制
发表时间：
2020-02
影响因子：
7.4
通讯作者：
J. Zeng;W. Gao;Zhi-Jian Duan;Yu Bai;Yong-Chang Guo;Li-jun Ouyang
中科院分区：
文献类型：
--
作者：
J. Zeng;W. Gao;Zhi-Jian Duan;Yu Bai;Yong-Chang Guo;Li-jun Ouyang
由于纤维增强聚合物（FRP）复合材料具有优异的耐腐蚀性能，因此与海水海砂混凝土（SSC）一起在海洋和沿海基础设施建设中具有很大的应用潜力。然而，现有的对玻璃钢护套约束的SSC柱的研究相当有限。大多数有限的研究集中在传统FRP护套（由碳和玻璃FRP复合材料制成）约束的SSC柱的轴压性能上。本文介绍了首次对轴向加载的圆形SSC柱的性能进行实验研究的结果，该柱由聚乙烯对苯二甲酸乙二醇酯（PET） FRP夹套约束，该夹套由一种新型且更有前途的FRP复合材料组成，具有双线性应力-应变响应和大断裂应变。试验中不同的参数包括玻璃钢夹套的类型和厚度以及用于铸造SSC的混合水的类型。建立了一个改进的面向分析的模型，其中提出了一个新的PET frp约束SSC的膨胀方程。然后，通过将预测结果与frp约束SSC的测试结果进行比较，检验了面向分析的模型的可靠性和准确性。
Since fiber-reinforced polymer (FRP) composites possess excellent corrosion resistance, they have great potential of use with seawater sea-sand concrete (SSC) for the construction of marine and coastal infrastructure. The existing research on SSC columns confined with FRP jackets, however, is rather limited. Most of the limited research has focused on the axial compressive behavior of SSC columns confined by conventional FRP jackets (made from carbon and glass FRP composites). This paper presents results from the first-ever experimental study on the behavior of axially loaded circular SSC columns confined by polyethylene terephthalate (PET) FRP jackets, which are composed of a new and more promising type of FRP composites with a bilinear stress-strain response and a large rupture strain. Parameters varied between the tests presented in this paper included the type and thickness of FRP jackets and the type of mixing water used for casting the SSC. A modified analysis-oriented model was developed in which a new dilation equation was proposed for the PET FRP-confined SSC. The reliability and accuracy of the analysis-oriented model were then examined by comparisons between the predicted results and the test results of the FRP-confined SSC.