Model Construction and Simulation Study on Bending Performance of Strengthened RC Beam in Externally Prestressing Industrial Reclaimed Steel Wire

Abstract

Strengthening with external prestressing is a kind of reinforcement method which imposes prestress on concrete by setting prestressed steel bar outside concrete, a new strengthening with external prestressing technology can be put forward by using industrial reclaimed steel wire instead of prestressing steel bar. High-quality steel wire is extracted from waste tire after stripping and derusting, and this kind of industrial reclaimed steel wire with high tensile strength and good toughness is applied to building reinforcement by externally prestressing method; it can provide a new research direction for the country’s green, low-carbon, and high-quality development. In this paper, the new strengthening with external prestressing technology is used to study the bending static load test of test beams under different working conditions. The influence of reinforcement material and rotational degree on the bending performance of RC beam is discussed. The results show that the ultimate bearing capacity of the flexural members with industrial recycled steel wire is more effective under the new external prestressed reinforcement method. Under the same reinforcement method, when the reinforcement materials are the same, the increase of prestress can effectively improve the bearing capacity of flexural members in the reinforced beams with prestress of 30%, 40%, and 50%, respectively. In order to verify the reinforcement effect of industrial recycled steel wire on the bending performance of RC beam from multiple perspectives, the numerical simulation was carried out on the concrete specimens reinforced with different degrees of woven reinforced wire, and the simulation results were in good agreement with the experimental results. This study provides a new research direction for the recycling of industrial reclaimed steel wire and the reinforcement of concrete components and has a good promotion, role, and theoretical support for subsequent research.