Experimental study on compressive behavior of concrete-filled GFRP tubular stub columns after being subjected to acid corrosion
Experimental study on compressive behavior of concrete-filled GFRP tubular stub columns after being subjected to acid corrosion
复制标题
GFRP管混凝土酸腐蚀后抗压性能试验研究
DOI：
10.1016/j.compstruct.2020.112630
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发表时间：
2020-10-15
影响因子：
6.3
通讯作者：
Chen, Xixiang
中科院分区：
文献类型：
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作者：
Guo, Zhan;Ye, Mengya;Chen, Xixiang
本文介绍了酸腐蚀后玻璃纤维钢管混凝土短柱的轴压试验结果。对54个酸腐蚀试件和9个未酸腐蚀试件进行了轴向试验。本研究所考虑的主要参数包括玻璃钢管壁厚、混凝土强度、酸溶液PH值、浸泡时间。酸性腐蚀后的钢管混凝土短柱均以GFRP管断裂和核心混凝土破碎为主要破坏形式。与未受酸腐蚀的钢管混凝土短柱相比，受酸腐蚀的钢管混凝土短柱的极限承载力显著降低。随着浸泡时间的延长，受酸腐蚀的钢管混凝土短柱的极限承载力降低。浸泡时间对酸腐蚀钢管混凝土短柱承载力下降率的影响最大，其次是酸溶液的pH值。玻璃钢管壁厚和混凝土强度对极限承载力下降率的影响可以忽略不计。此外，还利用ABAQUS软件建立了酸腐蚀CFGT短柱的有限元模型，并与试验结果进行了验证。
This paper presents the results of axial compression tests of concrete-filled GFRP tubular (CFGT) stub columns after being subjected to acid corrosion. Fifty-four specimens subjected to acid corrosion and nine specimens untreated with acid solutions are axially tested. The main parameters considered in this study include the wall thickness of GFRP tube, concrete strength, PH value of acid solution, and immersion duration. CFGT stub columns after being subjected to acid corrosion are all failed with the fracturing of GFRP tube and crushing of core concrete. The ultimate strength of the CFGT stub columns corroded by acid solution decreases remarkably compared with those without acid corrosion. The longer the immersion duration, the lower the ultimate strength of the acid corroded CFGT stub columns. Immersion duration has the greatest influence on the percentage decrease of ultimate strength of the acid corroded CFGT stub columns, followed by the PH value of acid solution. However, the effects of the wall thickness of GFRP tube and concrete strength on the percentage decrease of ultimate strength can be neglected. Additionally, the finite element models are also developed for the acid corroded CFGT stub columns by the ABAQUS software and are verified with the experimental results.