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

作　　者：黄帅 HUANG Shuai(Shanxi Transportation New Technology Development Co.,Ltd.,Taiyuan,Shanxi 030012,China)

机构地区：[1]山西省交通新技术发展有限公司,山西太原030012

出　　处：《山西交通科技》2024年第3期65-68,共4页Shanxi Science & Technology of Transportation

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。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 

分 类 号：U448.212[建筑科学—桥梁与隧道工程]