增强箍筋区域约束BFRP筋混凝土梁的抗弯性能试验研究

Experimental study on bending behavior of BFRP reinforced concrete beams with regional constraints by enhanced stirrup

将区域约束技术应用到BFRP筋混凝土梁中,并尝试利用增强的矩形螺旋BFRP箍筋约束受压区混凝土以增强受压区混凝土延性,对四根配置不同箍筋的区域约束BFRP筋混凝土梁进行抗弯性能试验。结果表明:区域约束BFRP筋混凝土梁比BFRP筋普通混凝土梁具有更高的承载能力和变形能力;通过增强的箍筋约束受压区混凝土,可以大大增加受压混凝土的抗压延性,使得使用脆性BFRP筋的混凝土梁也可以具有优良的延性性能。

The regional constraits technology was applied to BFRP reinforced concrete beams,and the reinforced rectangular spiral BFRP stirrups were used to restrain concrete in compression zone to enhance the ductility of concrete in compression zone.The experimental study on bending behavior of four regionally restrained BFRP reinforced concrete beams with different stirrups was tested.The results show that BFRP reinforced concrete beams with regional constraints have higher bearing capacity and deformation capacity than ordinary concrete beams with BFRP reinforcement.The reinforced stirrup constrains the concrete in the compression zone,which can greatly increase the compressive ductility of the concrete,so that the concrete beam using brittle BFRP bars can also have excellent ductility.