CFRP配筋活性粉末混凝土梁延性和变形性能

发布时间：2018-04-23 01:30

本文选题：活性粉末混凝土(RPC) + 纤维增强　；参考：《湖南大学学报(自然科学版)》2015年03期

【摘要】：在对不同参数CFRP配筋活性粉末混凝土梁受弯性能试验研究的基础上,对CFRP配筋活性粉末混凝土梁的延性和变形性能进行了研究,并采用数值分析对CFRP配筋活性粉末混凝土梁的延性性能进行了参数分析.试验和分析结果表明:与CFRP配筋普通混凝土梁相比,CFRP配筋活性粉末混凝土梁具有良好的延性和变形能力;提出的荷载-挠度曲线下降段斜率公式能较好地反映出结构实际受力情形,由此计算的基于能量定义的延性指标与试验值吻合较好;采取增大混凝土极限压应变、增加预应力筋无黏结长度、增大受压钢筋的配筋率或降低有效预应力均能有效增大发生混凝土压碎破坏CFRP配筋RPC梁的延性和变形能力.
[Abstract]:The ductility and deformation properties of CFRP reinforced reactive powder concrete beams are studied on the basis of the experimental study on the flexural behavior of CFRP reinforced reactive powder concrete beams with different parameters. The ductility of CFRP reinforced reactive powder concrete beams was analyzed by numerical analysis. The experimental and analytical results show that CFRP reinforced reactive powder concrete beams have good ductility and deformation capacity compared with ordinary concrete beams reinforced by CFRP. The slope formula of the descending section of load-deflection curve can better reflect the actual stress situation of the structure, and the ductility index based on the energy definition is in good agreement with the test value, and the ultimate compressive strain of concrete should be increased. The ductility and deformability of CFRP reinforced RPC beams caused by concrete crushing failure can be effectively increased by increasing the unbonded length of prestressed tendons, increasing the reinforcement ratio of compressed bars or decreasing the effective prestressing force.
【作者单位】：中南大学土木工程学院;湖南大学土木工程学院;
【基金】：国家自然科学基金资助项目(50478502)~~
【分类号】：TU377.9

【参考文献】