Strength of reinforced concrete bending elements with additional high-strength reinforcement without adhesion to concrete
Abstract
Strength of reinforced concrete bending elements with additional high-strength reinforcement without adhesion to concrete
Incoming article date: 24.12.2019The article discusses the impact of high-strength reinforcement without adhesion to concrete on the strength of reinforced concrete floors. It was revealed that the rebound created by the prestressing force is distributed along the length of the element in accordance with the trajectory of the reinforcement laying. An analytical dependence has been obtained that allows one to quantify the decrease in positive moments depending on the magnitude of the load and relative deflections. The graphs of the dependence of the reduction of positive moments due to the resistance of the cables to the load and relative deflections are constructed. It is established that the influence of relative deflections on the decrease in moments does not depend on the magnitude of the external load. The main factors for reducing the positive aspects are the initial eccentricity and the deflection acquired during operation. The results can be used in the design of plates and beams using prestressed reinforcement without adhesion to concrete.
Keywords: high-strength reinforcement, reinforced concrete, bending moment, bending element, normative deflection, repulse, strength