Reinforcement Of Full-length Curved Cross-section Wood Beam By BFRP Cloth Performance Study

BFRP is widely used in the study of wood beam reinforcement because of its high strength,high temperature resistance,acid and alkali resistance and good insulation performance and fire resistance.However,the current research object is mainly rectangular or square cross-section wood beam.For the extensive use of circular cross-section of wooden beams,but there is little related reinforcement research.In this paper,the wood beams used in the southwest area were used to reinforce the wood beams with different bonding layers and different reinforcement methods.The reinforced wood beams were subjected to bending test,Beam bending capacity,deflection and failure of the shape of the comparison.This paper summarizes the bending failure mechanism of full-length logs,and on the basis of understanding the bending resistance of full-length logs,the method of strengthening wood beams is put forward.The main work can be described as a few aspects:(1)The basic physical and mechanical properties of the wood used in the test were obtained by the material test.On this basis,the bending test was carried out on the full-length circular beam without any reinforcement.The specimen is loaded with a hydraulic jack at two points,and the load is conveyed by the distribution beam.In order to understand the deformation of the wood beam across the middle section along the cross-section of the deformation of the situation,in the corresponding position of the strain gauge,to get the bending beam is consistent with the bending beam in order to understand the deformation of the wood beam in the process of deformation And the stress-strain curve of the logs is summarized.The failure mechanism is analyzed by the ultimate bearing capacity,the strain,the load-displacement curve and the stress-strain curve.(2)On the basis of deep understanding of the damage of logs and logs,combined with the existing reinforcement methods,a new reinforcement method is proposed and compared with the other two reinforcement methods.The failure modes of each reinforcement method are analyzed,the damage mechanism of each reinforcement method is analyzed,and the relationship between the bending capacity and the reinforcement method is established after selecting the optimal reinforcement method.(3)The whole process of bending performance test of reinforced wood beams was simulated by ANSYS software.By comparing the numerical simulation results with the experimental results,the feasibility of numerical simulation of BFRP reinforcement by ANSYS program is verified.