摘要
通过6根玄武岩FRP筋混凝土梁与6根钢筋混凝土梁静力加载对比试验,研究不同纵筋配筋率的玄武岩FRP筋混凝土梁与钢筋混凝土梁的受力性能,分析其承载力变化过程、破坏形态、挠度变形与裂缝发展情况。试验结果表明,玄武岩FRP筋混凝土梁载荷–挠度曲线近似为直线,但仍然具有较好的延性;开裂载荷与极限载荷相比钢筋混凝土梁略低;裂缝宽度在2.5 mm以内,且分布对称均匀,裂缝间距略大于钢筋混凝土梁;玄武岩FRP筋混凝土梁产生的挠度较大,应提高玄武岩FRP筋与混凝土之间的粘结性能,最大限度发挥玄武岩FRP筋抗拉强度高的特点。
Static loading tests were performed for six basalt FRPs reinforced concrete beams and six reinforced concrete beams. The effects of different longitudinal reinforcement ratios on the mechanical behavior of basalt FRP reinforced concrete beams and reinforced concrete beams were studied. The flexural capacity, failure mode, flexibility deformation and crack distribution were analyzed. The test shows that load-deflection curve of the basalt FRP reinforced concrete beams is almost a straight line, but still performs a better ductility at the late loading stage. Cracking load and ultimate load are lower than that of the reinforced concrete beams, but crack width can be controlled within 2.5 ram, and the crack spacing is wider than that of the reinforced concrete beams. The deflection of the basalt FRP reinforced concrete beam is larger than that of reinforced concrete beams, so better non-peeling basalt FRP tendons should be made to ensure adequate bond strength with the concrete, which can maximize high tensile strength of basalt FRP tendons.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2014年第4期82-85,共4页
Engineering Plastics Application
基金
国家自然科学基金资助项目(51174268)
辽宁省自然科学基金(2051207)
关键词
玄武岩FRP筋混凝土梁
对比试验
力学性能
配筋率
basalt FRP reinforced concrete beam
contrast test
mechanical property
reinforcement ratio
