GFRP−钢复合筋与珊瑚海水海砂混凝土粘结性能试验研究
陆晓婉 , 张海滨 , 孙天舒 , 陈天宇 , 刘婉秋 , 周智
海南大学学报(自然科学版中英文) ›› 2026, Vol. 44 ›› Issue (4) : 351 -363.
GFRP−钢复合筋与珊瑚海水海砂混凝土粘结性能试验研究
Experimental study on the bond behavior between GFRP-steel composite bars and coral seawater sea-sand concrete
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深远海岛礁工程建设面临传统建筑材料耐腐蚀性不足和远洋运输成本高昂的严峻挑战。采用属地化材料与复合材料是可行的解决方案,但玻璃纤维 (GFRP)−钢复合筋与珊瑚海水海砂混凝土 (CSSC) 的粘结性能目前尚不明确。针对此问题,本研究设计了 5 组共 15 个中心拉拔试件,分析了珊瑚海水海砂混凝土立方体抗压强度、GFRP−钢复合筋直径和 GFRP−钢复合筋粘结长度对粘结性能的影响,并提出了 GFRP−钢复合筋与珊瑚海水海砂混凝土的粘结强度计算式以及基本锚固长度计算式。结果表明:试件极限粘结强度主要与 CSSC 立方体抗压强度、GFRP−钢复合筋粘结长度呈正相关;初始粘结刚度与 CSSC 立方体抗压强度呈正相关。
The construction of projects on remote islands and reefs faces severe challenges, including insufficient corrosion resistance of traditional building materials and high costs for long distance marine transportation. The use of localized materials and composite materials represents a feasible solution, though the bonding performance between GFRP-steel composite bars and coral seawater sea-sand concrete (CSSC) remains unclear. To address this issue, this study designed five groups comprising a total of 15 central pull-out specimens to analyze the effects of CSSC strength, GFRP-steel composite bar diameter, and bond length on bonding performance. Bond strength and basic anchorage length calculation formulas for GFRP-steel composite bars and coral seawater sea-sand concrete were proposed. The results indicate that the ultimate bond strength of test specimen is primarily positively correlated with the cube compressive strength of CSSC and the bond length of GFRP-steel composite bars, while the initial bond stiffness shows a positive correlation with the cube compressive strength of CSSC. The experimental data can provide support for the application of localized materials in the construction of remote island and reef projects.
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