GFRP橡胶颗粒复合高强混凝土梁受弯性能研究

Study on Flexural Property of GFRP Rubber Particle Composite High Strength Concrete Beams

为进一步提升纤维筋钢筋混凝土梁的耐久性能,提升钢筋混凝土梁的承载能力。基于此,文中开展橡胶颗粒掺量与配筋率对GFRP橡胶颗粒复合高强混凝土梁受弯荷载作用下力学响应的分析。结果表明:与未掺加橡胶颗粒的混凝土梁相比,橡胶颗粒掺量为5%、10%的开裂荷载增幅分别为23%、41.8%;极限荷载增幅分别为8.4%、5.5%。与配筋率为1.69的混凝土梁相比,配筋率为2.63%的开裂荷载增幅分别为4.9%;极限荷载增幅分别为4.6%。

In order to further improve the durability of fiber reinforced concrete beams,and enhance the bearing capacity of reinforced concrete beams,the mechanical response of GFRP rubber particle composite high-strength concrete beams under bending load was analyzed by rubber particle content and reinforcement ratio.The results show that the cracking load increases by 23%and 41.8%when the rubber particle content is 5%and 10%,respectively,compared with the concrete beam without rubber particle.The increase of ultimate load is 8.4%and 5.5%respectively.Compared with the concrete beam with reinforcement ratio of 1.69,the crack load increase of 2.63%is 4.9%respectively.The ultimate load increase is 4.6%respectively.