INFLUENCE OF INITIAL PULLOUT HISTORY ON ADDITIONAL DISPLACEMENT UNDER CONSTANT PULLOUT LOAD IN STEEL STRIP REINFORCED EARTH WALL

Abstract

 To investigate the residual pullout resistance characteristics of the reinforcement in a reinforced earth wall, we examined the pullout behavior of reinforcement up to a certain initial displacement. First, the displacement-controlled pullout test was conducted on the test apparatus that reproduced stress conditions around the reinforcement, and the basic pullout resistance characteristics of the reinforcement were determined. Second, a load-controlled pullout test was performed. In this test, after applying an initial displacement, the load-controlled condition was applied, and the pullout load was maintained. From the pullout behavior of the reinforcement, we clarified the influence of initial displacement and pulling of the load on residual displacement and cumulative displacement. Furthermore, we evaluated the residual resistance of the reinforcement. Thus, we clarified that if the pullout load is constant, the subsequent pullout displacement increases with the initial displacement of the reinforcement. In a nutshell, if the displacement does not exceed the inflection point of the pullout curve, the residual resistance of the reinforcement is sufficient.