Abstract
Understanding the bond behavior of steel rebar in concrete is important in order to determine the performance of a reinforced concrete structure. Although numerous studies have been carried out by many researchers to develop a robust model for numerical analysis, no consensus has been reached as the bond behavior depends on hysteresis. In this study, the bond behavior of a steel bar in concrete with pre-existing damage is investigated under low-level cyclic loading. Based on the experimental bond stress and slip curve, a numerical model for finite element analysis to simulate the effect of low-level cyclic loading is proposed. The results from the numerical analysis show good agreement with the experimental data, including accumulated damage on stiffness and strength throughout entire load cycles.
Highlights
Bonding behavior of steel bars in concrete has been studied by several researchers in recent decades
The effect of hysteresis on the bond behavior of a steel bar in concrete was first reported in the early 1970s [6], and a number of studies reported in the 1980s [7,8,9] laid groundwork for a numerical model
Eligehausen et al [8] carried out an experimental study to investigate the bond stress–slip relationship under cyclic loading with an extensive list of variables
Summary
Bonding behavior of steel bars in concrete has been studied by several researchers in recent decades. In 1960s and 1970s, most of experimental studies focused on the bond behavior under monotonic loading with different factors as variables: rebar deformation [1], boundary condition [2], deformation dimensions [3], and cover thickness and concrete strength [4]. The effect of hysteresis on the bond behavior of a steel bar in concrete was first reported in the early 1970s [6], and a number of studies reported in the 1980s [7,8,9] laid groundwork for a numerical model. Eligehausen et al [8] carried out an experimental study to investigate the bond stress–slip relationship under cyclic loading with an extensive list of variables. Finite element analysis to simulate the effect of low-level cyclic loading is derived based on the experimental result
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