To investigate the interface shear performance of combined ultra-high performance concrete(UH-PC)and normal concrete(NC)box girder,three types of specimens with different interface treatment meth-ods were designed in this paper,which were respectively untreated,chiseled wool,coated with retarder and washed with water.At the same time,the push-out test of UHPC and NC was conducted to analyze the fail-ure pattern and shear performance of the three types of specimens.The test results show that after the inter-face treatment of the ultra-high performance composite structures with normal concrete,the failure mode of the specimen is the pull-out damage of the normal concrete side,which is the same as the failure mode with-out interface treatment,and the initial shear stiffness of all specimens is similar.However,different inter-face treatment methods have a great impact on the average shear strength of specimens.The average shear strength of specimens after interface treatment is significantly increased compared with that without treat-ment,and is more than 4 times of that without treatment.
关键词
超高性能混凝土/推出试验/界面破坏形态/组合顶板/抗剪性能
Key words
ultra-high performance concrete/push-out test/interface failure pattern/composite top plate/shear resistance
维普
万方数据