海洋环境GFRP筋海水海砂混凝土梁受力性能试验及承载力计算

doi:10.11896/cldb.22040207

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Abstract To investigate the mechanical properties ofGlass Fiber Reinforced Polymer bars (GFRP bars) reinforced seawater sea-sand concrete beams exposed to marine environment, seven beams were designed for static loading tests using exposure environment, exposure duration, and sea-sand replacement ratio as various parameters. The failure process and failure mode of the specimens were observed, the load versus deflection curves were obtained. Then, the effects of various parameters on the ultimate bearing capacity, initial stiffness, and ductility coefficient of these beams were analyzed. The results show that, compared with the general atmospheric environment, the ultimate bearing capacity of specimen is improved by 28.0% after being exposed to salt-spray environment, while decreased by 13.0% after being exposed to tidal environment. During a 270 day exposure duration, with the increase of the exposure duration of tidal environment, the ultimate bearing capacity increases first and then decreases, while the initial stiffness and ductility coefficient of specimens both tend to decrease. The increase of sea sand replacement ratio is detrimental to specimens’ ultimate bearing capacity and initial stiffness. Finally, the calculation method of the flexural capacity of GFRP bars reinforced seawater sea-sand concrete beams exposed to marine environment is discussed.

Key words： marine environment GFRP bar seawater sea-sand concrete beam mechanical property bearing capacity calculation

Published: 25 October 2023 Online: 2023-10-19

CLC number:

TU528

Fund:National Natural Science Foundation of China (51578163), Bagui Scholars Special Funding Project ([2019] No.79), Guangxi Science and Technology Base and Talent Special Project (Guike AD21075031), Projects Funded by the Central Government to Guide Local Scientific and Technological Development (Guike ZY21195010), Guangxi Key Research and Development Project (Guike AB21220012), and Innovation Project of Guangxi Graduate Education (YCBZ2021020).

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	CHEN Zongping
	LI Shengxin
	ZHOU Ji
	DAI Shangqin

Cite this article:

CHEN Zongping,LI Shengxin,ZHOU Ji, et al. Test on Mechanical Properties and Bearing Capacity Calculation of GFRP Bars Reinforced Seawater Sea-sand Concrete Beams Exposed to Marine Environment[J]. Materials Reports, 2023, 37(20): 22040207-10.

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http://www.mater-rep.com/EN/10.11896/cldb.22040207 OR http://www.mater-rep.com/EN/Y2023/V37/I20/22040207

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