Numerical analysis of reinforced concrete beams subjected to impact loads

Abstract

Numerical models for impact load assessment are becoming increasingly reliable and accurate in recent years. The processing time duration for such analysis has been decreased to an acceptable level when combined with modern computer hardware. The aim of this study was to represent a simulation technique and to verify the validity of modern software in measuring the response of reinforced concrete beam strengthened by carbon fiber-reinforced polymer (CFRP) sheet subjected to impact loads at the ultimate load ranges. In this investigation, ABAQUS/Explicit Software’s nonlinear finite element modeling had been used. The response of the impact force–time history and the displacement–time history graphs were compared to the existing experimental results. The adopted general-purpose finite element analysis is verified to be capable of simulating and accurately forecasting the impact behavior for structural systems. In addition, a parametric analysis was carried out to gain a better knowledge of the performance of reinforced concrete beams under impact loading. Four parameters had been changed among the analyzed beams such as impact velocity, impact mass, CFRP sheet thickness, and compressive strength of concrete. Generally, it has been found that using a CFRP sheet in strengthening reinforced concrete beams can greatly improve the members’ impact behavior by improving stiffness as well as increasing load-carrying capacities. The enhanced performance characteristics of strengthening beams under impact loads correlate with the applied kinetic energy and CFRP thicknesses. Finally, for beams with high compressive strength, the deflection values were reduced because of the increase in stiffness.

Computer Simulation and Numerical Analysis of Damaged Beams Reinforced With Fiber Concrete

“…Comparing the results of calculating the maximum stresses in SOFiSTiK with the results of experimental studies gives a maximum discrepancy of 5.85% (sample ZBP3). And the biggest discrepancy between the data of the experiment and the numerical analysis occurs in the deflections -here it fluctuates in the range of 19 (2020). Numerical analysis of reinforced concrete beams strengthened in shear using carbon fiber reinforced polymer materials.…”

“…Варто відмітити також роботу [19], виконану в ABAQUS, де викладено методику моделювання та нелінійного аналізу для вимірювання реакції залізобетонної балки, зміцненої листом з армованого вуглецевим волокном полімеру (CFRP), який піддається ударним навантаженням.…”