摘要
钢筋在恶劣环境中极易发生腐蚀,导致混凝土构件的力学性能退化,而采用纤维增强复合材料(FRP)箍代替钢筋能有效规避这个问题。但FRP箍较低的弹性模量使得梁易产生脆性的剪切破坏,同时其各向异性的特点使得FRP箍筋的弯折强度大大低于直线段强度,导致配FRP矩形箍混凝土梁的受剪承载力低于钢筋混凝土梁。近20年来,国内外学者为了探究配FRP矩形箍混凝土梁的实际应用价值,进行了一系列实验研究及理论推导,提出了受剪承载力以及FRP箍筋弯拉强度的计算方法。本文全面总结了上述有关研究成果,并对今后的研究方向进行了展望,以期为该类结构构件的应用发展提供参考。
Steel bars are prone to corrosion in harsh environments,resulting in degradation of mechanical properties of concrete members.Replacing steel bars with fiber reinforced polymer(FRP)stirrup can effectively avoid this problem.However,the low elastic modulus of FRP stirrup makes the beams easy to produce brittle shear failure.And the anisotropy makes the bending strength of FRP stirrup much lower than that of the straight section,resulting in the shear capacity of concrete beams with FRP rectangular stirrup being lower than that of reinforced concrete beams.In the past 20 years,in order to explore the practical application value of concrete beams with FRP rectangular stirrup,domestic and foreign scholars have carried out a series of experimental research and theoretical derivation,and put forward the calculation methods of shear bearing capacity and bending strength of FRP stirrup.In this paper,the above research results are summarized comprehensively,and the future research direction is prospected,in order to provide reference for the application and development of this kind of structural members.
作者
王锦辉
陆春华
冯晨阳
朱学武
WANG Jinhui;LU Chunhua;FENG Chenyang;ZHU Xuewu(Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,China)
出处
《硅酸盐通报》
CAS
北大核心
2024年第8期2726-2736,共11页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51878319)。
关键词
FRP箍
弯折强度
受剪承载力
灰度关联分析
影响因素
抗剪机理
FRP stirrup
bending strength
shear capacity
gray correlation analysis
affecting factor
shear mechanism
