CFRP筋-珊瑚混凝土梁受弯性能试验研究
Experimental study on flexural performance of CFRP-coral concrete beams
王磊 1樊浪波 2张前程 2黄昌石 3黄龙 2梁林 2张继旺1
作者信息
- 1. 桂林理工大学土木工程学院,桂林 541004;广西北部湾绿色海洋材料工程研究中心,桂林 541004
- 2. 桂林理工大学土木工程学院,桂林 541004
- 3. 钦州市自然资源局,钦州 535000
- 折叠
摘要
为研究CFRP筋-珊瑚混凝土梁受弯性能,开展了CFRP筋-珊瑚混凝土梁受弯试验,以同直径的普通钢筋-珊瑚混凝土梁为对照组,对CFRP筋-珊瑚混凝土梁的抗弯承载力、破坏模式、裂缝开展及挠度进行了研究.结果表明:配筋率和混凝土强度相同的情况下,CFRP筋-珊瑚混凝土梁承载力高于普通钢筋-珊瑚混凝土梁;混凝土强度分别从 34.8MPa和 37.7MPa增加到 44.0MPa时,试验梁极限承载力分别提高了 21.42%和16.11%,裂缝宽度分别平均减小 3.6%和 5.9%,挠度也随混凝土强度的提高而减小.采用了美国规范ACI 440.1R-15 对CFRP筋-珊瑚混凝土梁的抗弯承载力进行了计算,发现其被高估,建议考虑构件挠度的影响.
Abstract
In order to study flexural performance of CFRP-coral concrete beam,flexural test of CFRP-coral concrete beam was carried out.The flexural bearing capacity,failure mode,crack development and deflection of CFRP-coral concrete beam were studied with ordinary steel-coral concrete beam of the same diameter as the control group.The results show that when the reinforcement ratio and the concrete strength are the same,the bearing capacity of the CFRP-coral concrete beam is higher than that of ordinary steel-coral concrete beam.When the concrete strength increases from 34.8MPa and 37.7MPa to 44.0MPa,the ultimate bearing capacity of the test beam increases by 21.42%and 16.11%,the crack width decreases by 3.6%and 5.9%,respectively,and the deflection also decreases with the increase of the concrete strength.The flexural bearing capacity of CFRP-coral concrete beams was calculated by using the American specification ACI 440.1R-15.It is found that it is overestimated and it is recommended to consider the influence of component deflection.
关键词
受弯性能/CFRP筋-珊瑚混凝土梁/抗弯承载力/裂缝宽度/挠度Key words
flexural performance/CFRP-coral concrete beam/flexural bearing capacity/crack width/deflection引用本文复制引用
出版年
2024
NETL
NSTL
万方数据