Flexural Experimental Study of Damaged Reinforced Concrete T-Beam Strengthened by Filling UHPC
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.
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