Anotace:
In this paper, the flexural performance of seven steel wire mesh and polyurethane cement (SWM-PUC) composite strengthened beams was investigated experimentally. The variation law of flexural performance of reinforced beams is clarified. Based on the experimental research, the deflection and stress analysis of SWM-PUC composite strengthened reinforced concrete beams was conducted using finite element analysis software ABAQUS. The Bending properties of reinforced beams with different steel wire mesh (SWM) reinforcement rates and different polyurethane cement (PUC) thickness parameters were researched. The reinforcement ratios of SWM are 0.064%, 0.087%, 0.114%, 0.144%, and 0.178%, respectively. The PUC thickness is 20mm, 25mm, 30mm, 35mm and 40mm. The finite element analysis shows that as the reinforcement ratio of the SWM increases, the yield and ultimate loads gradually increase and the deflection then gradually decreases. When the reinforcement ratio reaches a certain level, the increase in yield load decreases with the increase of reinforcement ratio. In the case of 0.114% increase in the reinforcement ratio of the SWM, the ultimate load of the simulated beams was increased by 47% compared to the simulated beams with 0.064% reinforcement ratio of the SWM. As the thickness of the PUC increases, the yield limit and ultimate load gradually increase, and the deflection value decreases continuously. The ultimate load of the reinforced beam with PUC at 40mm thickness was increased by 20.5% compared to the reinforced beam with 30cm thickness. The optimum configuration of the SWM -PUC composite reinforcement layer was given through the finite element analysis.