Experimental Study On Flexural Behavior Of T-section Ribbed Composite Beams Of Aluminum-OSB Plate

With the continuous development of modem structural engineering,there is an increasing demand for various structural forms that can meet the special requirements of corrosion resistance,high humidity resistance and the like.For coastal and island-type cities,innovative and energy-efficient new forms of architecture are among the most important issues of concern.As a new type of composite structure,the aluminum-OSB plate T-section ribbed composite beam is suitable for coastal and island-type cities.It is a green and environmentally friendly building with good market application prospects,hereinafter referred to as aluminum-wood composite beams.In this paper,the bending capacity performance of aluminum-wood composite beams is tested.Based on the bearing capacity superposition method,a simplified method for calculating the bearing capacity of aluminum-wood composite beams is proposed.Finally,the ABAQUS finite element analysis software is used to analyze and simulate the aluminum-wood composite beams.,The main contents are as follows:(1)The flexural capacity test of four aluminum-wood composite beams was carried out with the thickness of aluminum plate,the height of load-bearing beam and the spacing of self-tapping screws.The test results show that the OSB plate and the aluminum plate can work together and deform.The cross-section of the composite beam basically conforms to the section assumption.The composite beam finally breaks with the load point corresponding to the bottom of the load-bearing beam and expands to the top of the beam.(2)Based on the bearing capacity superposition method,a simplified calculation formula for the mid-span deflection and flexural capacity of aluminum-wood composite beams is proposed.The simplified formula calculation results are compared with the experimental results.The results show that the calculated values are basically consistent with the experimental values.It provides a theoretical reference for the practical engineering application of aluminum-wood composite beams.(3)The ABAQUS finite element software was used to simulate four sets of aluminum-wood composite beam specimens with different parameters.The embedded constraint between the self-tapping screws and the beam body was established.The friction contact unit was established between the folded aluminum plate and the load-bearing beam.To simulate the interaction between the two.The ABAQUS simulation results are compared with the experimental results.The flexural capacity and the mid-span deflection are relatively close,which indicates that the established finite element model is basically feasible.(4)On the basis of experimental research and finite element analysis,the effects of aluminum plate thickness,load beam height,cover span and self-tapping screw spacing on the flexural capacity of aluminum-wood composite beams are considered.The simulation analysis of the pure wood beam shows that the aluminum plate and the OSB plate each contribute to the bearing capacity of the aluminum-wood composite beam.