Abstract
This paper studied numerically the behavior of carbon fiber reinforced polymer (CFRP) confined bundle reinforced concrete (BRC) columns subjected to repeated impact load. To verify the numerical models with previous experimental tests, Abaqus/Explicit based nonlinear finite element (FE) model was developed. Based on the proposed FE analysis, a parametric study was conducted to investigate the effects of different factors such as CFRP confinement, eccentric axial load, bundle reinforcement arrangement, and column height on repeated impact capacity of RC column. While modeling the structural element, concrete damage plasticity (CDP) model is adopted to account for the plastic and strain rate-dependent behaviors of concrete material under impact load. From the nonlinear FE analysis result, it was found that CFRP confinement improved the impact capacity of bundle reinforced concrete column. As column height increased, the column impact resistance was found to decrease. Moreover, when the CFRP strengthened BRC column specimens were repeatedly impacted, the continuous matrix material was severely damaged, while the fiber showed only minor and gradual compressive failures.
Highlights
Impact phenomena cover a wide range of applications
In developing countries, compared to the finite element analysis, conducting an experimental study is a typically expensive and time-consuming task. erefore, the need is evident to investigate numerically the impact performance of Carbon fiber reinforced polymer (CFRP) strengthened bundle reinforced concrete (BRC) column subjected to lateral impact load
A good agreement is observed between the failure modes of nonlinear finite element (FE) analysis and experimental results of the RC column
Summary
Impact phenomena cover a wide range of applications. A military engineer wants to design strong military works that withstand high-velocity projectiles, vehicle manufacturers require improving the efficiency and safety of their product by understanding how it behaves under impact scenario, and most importantly structural engineer needs to design stable and cost-effective structural elements that resist impact load safely. E drop weight impact test results presented that the FRP composite laminate significantly increased the impact capacity of the RC beams by reducing the residual deflection and width of the crack. Eir results reveal that the application of CFRP composite wrapping on the RC pier improves the impact load capacity by increasing impact resistance and reducing structural damage. Eir result showed that CFRP retrofit enhances the impact resistance of RC beams by reducing their deflection and limiting the damage profile. Erefore, the need is evident to investigate numerically the impact performance of CFRP strengthened BRC column subjected to lateral impact load. The effect of different parameters such as CFRP, bundle reinforcement, eccentric axial load, and column height on the repeated impact capacity of BRC column was investigated. An explicit FE model was developed to verify the numerical model by comparing it with the previous experimental test result
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