- 陳甫亮1，胥 卉2,廖楨穎1，王韶纖2,李俊杰1，陳 俊2
引用本文摘 ? 要：新舊混凝土疊合面的剪切強度是衡量界面黏結性能的最重要指標?；赯形黏結試件剪切試驗，研究了不同疊合層材料、不同界面處理方式、不同槽口形式下的疊合界面抗剪性能。結果表明，UHPC試件表現出較好的界面抗剪能力，其承載力均高于自密實試件。對于槽口構件，槽口連接形式能提高疊合面抗剪承載力，其中梯形槽口對界面抗剪承載力提升效果更為顯著。槽口形式對UHPC材料與C30混凝土界面抗剪能力的影響相較于其對自密實材料與C30混凝土界面抗剪能力的影響更為顯著。對于有錨固鋼筋的試件，增大錨固鋼筋的錨固長度可以提高UHPC材料與C30混凝土界面抗剪能力；對于無錨固鋼筋無槽口試件，氣泡紙粗糙面處理可以改善UHPC試件的變形能力。 Abstract: The shear strength of old and new concrete combined interface is the most important index to measure the interfacial bonding property. Based on the shear test of z-shaped bonding specimens, the shear resistance of composite interface with different laminated materials, different interface treatment methods and different notches was studied. The results show that the UHPC specimens exhibit good interface shear resistance and their bearing capacity is higher than that of self-compacting specimens. For the notched specimens, the notched joint can improve the shear strength of the composite surface, among which the trapezoidal notched joint has more significant effect on the shear strength of the interface. The influence of notch form on the shear resistance of UHPC material and C30 concrete interface is more significant than that of self-compacting material and C30 concrete interface. For the specimens with anchorage reinforcement, increasing the anchorage length of the anchorage reinforcement can improve the shear resistance of the interface between UHPC material and C30 concrete. For non-anchorage steel bar notched specimens, bubble paper rough surface treatment can improve the deformation capacity of UHPC specimens.
陳甫亮,胥卉,廖楨穎,等.新舊混凝土疊合面抗剪性能研究[J].混凝土與水泥制品,2020(10):75-79. CHEN F L,XU H,LIAO Z Y,et al.Research on the Shear Resistance of Combined Interface of New and Old Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):75-79.