UHPC填充加固受损钢筋混凝土T梁受弯试验研究
Flexural Experimental Study of Damaged Reinforced Concrete T-Beam Strengthened by Filling UHPC
黄帅1
作者信息
- 1. 山西省交通新技术发展有限公司,山西 太原 030012
- 折叠
摘要
为了研究受损钢筋混凝土T梁的加固方法与加固后的受弯性能,设计了 2个T梁试验模型,对在受损区填充超高性能混凝土(UHPC)加固后T梁的受弯承载性能开展了研究,获得了 T梁试验模型的破坏模式、荷载-竖向变形曲线、应变、开裂形态等试验结果.研究结果表明,在受损区填充浇筑UHPC的加固效果比较理想,通过对UHPC-NC界面进行合理处理,能够恢复并提高试件的开裂荷载与受弯承载力,UHPC与T梁混凝土之间界面良好的黏结性能保证了界面剥离发生在混凝土T梁基体开裂后,这能有效地提高加固后T梁的耐久性.
Abstract
To study the reinforcement methods of the damaged reinforced concrete T-beam and its flexural behavior after the reinforcement,two T-beam specimens were designed to study the flexural bearing capacity of the T-beam strengthened by filling UHPC in the damaged area,and test results of failure forms,load-vertical deformation curves,strain,and crack shapes were obtained.The study results showed that the reinforcement effect of filling UHPC in the damaged area was ideal,and proper treatment at the UHPC-NC interface could recover and improve the crack loads and flexural bearing capacity of specimens.The good adhesion of the interface between UHPC and concrete T-beam guarantees that the interface stripping occurs after cracking of the concrete T-beam matrix,which can effectively improve the durability of the reinforced T-beam.
关键词
钢筋混凝土T梁/撞击损伤/填充加固/UHPC-NC界面Key words
reinforced concrete T-beam/impact damage/filling reinforcement/UHPC-NC interface引用本文复制引用
出版年
2024
NETL
NSTL
万方数据