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

作　　者：王磊[1,2] 樊浪波 张前程 黄昌石 黄龙 梁林 张继旺 WANG Lei;FAN Langbo;ZHANG Qiancheng;HUANG Changshi;HUANG Long;LIANG Lin;ZHANG Jiwang(College of Civil Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Beibu Gulf Green Marine Materials Engineering Research Center,Guilin 541004,China;Qinzhou Natural Resources Bureau,Qinzhou 535000,China)

机构地区：[1]桂林理工大学土木工程学院,桂林541004 [2]广西北部湾绿色海洋材料工程研究中心,桂林541004 [3]钦州市自然资源局,钦州535000

出　　处：《建筑结构》2024年第22期81-85,共5页Building Structure

基　　金：国家自然科学基金(51868014);广西自然科学基金(2018GXNSFAA281188)。

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。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 

分 类 号：TU377.1[建筑科学—结构工程]