Experimental investigation of post-installed adhesive anchors in concrete under tension and shear loads

Document Type : Research Article


School of Civil Engineering, College of Civil Engineering, University of Tehran, Tehran, Iran


 One of the most widely used techniques in the rehabilitation of concrete structures is the application of post-installed adhesive anchors in concrete. The main purpose of this study is to evaluate the efficiency and safety of this technique under domestic Iranian workshop conditions. This study focuses on the effects of parameters such as adhesives used in Iran, embedment depth, edge distance, and the use of either single or group of anchors in both reinforced and plain concrete members. The design procedure is in accordance with ACI 318-19 guidelines. For this study, eight tension and eight shear tests are carried out and the type of failure and the factors affecting their behavior are examined. The results show that by increasing embedment depth and distance from the edge of the concrete member, both tensile and shear capacities increase. In group installation, by reducing the rebar spacing, the nominal bond strength between adhesive and concrete decreases due to the initiation of cracks in adjacent rebars. Finally, the comparison of experimental results with ACI 318-19 equations shows that the code predicts the tensile and shear failure capacities with safety factors of at least 1.5 and 2, respectively.


Main Subjects

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