| In order to promote the adjustment and upgrading of industrial structure,wood structure and glued wood structure have been developed rapidly in the engineering along with the popularization of assembly structure in our country.The Corn Stalk Recombinant Glulam is produced by the new technology of retaining the original fiber tissue after multi-process processing.It has the advantages of high strength,corrosion resistance,wide range of sources,insect-proof and moisture-proof,good fire resistance,environmental protection and energy-saving,and so on.But at present,corn straw only appears as decoration board,and it has not been used in the field of building structure.Therefore,it is necessary to strengthen the study on the mechanical properties of Corn Stalk Recombinant Glulam as structural components to provide scientific,reliable theory and applicable and effective design parameters for practical engineering applications.We hope to fill the blank in the field of design and application of Corn Stalk Recombinant Glulam as structural material in our country.Therefore,the study of this paper has important theoretical significance and broad application prospects.First of all,this paper takes Corn Stalk Recombination Material and Corn Stalk Recombinant Glulam as the basic research object,through drawing lessons from the experiment mechanism and test method of wood,glued wood and reconstituted bamboo.The basic mechanical properties were measured andanalyzed.The experimental results show that the compressive strength of the reconstituted material is 33.1 MPa,the transverse compressive strength of the vertical and row lines is 16.4 MPa,and the modulus of compressive elasticity of the composite material is 9270 MPa.The compressive strength of Corn Stalk Recombinant Glulam is 27.4 MPa,and the compressive strength of vertical grain and row grain is 27.4 MPa,and that of vertical grain and row grain is27.4 MPa.The results are as follows: 12 MPa and 19.5 MPa,respectively,and the modulus of compressive elasticity of the integrated material is 8817 MPa.Secondly,the ABAQUS finite element software is used to simulate and analyze the axial compression components with different slenderness ratio.The stress cloud,displacement cloud,buckling load and nonlinear load of the axial compression member are obtained by the finite element method,and the stress cloud diagram,displacement cloud diagram,buckling load and non-linear load of the component are obtained by the finite element method.The load-transverse displacement curve and load-axial displacement curve of axial compression member are drawn according to the simulation analysis data.The results of comparative analysis show that the buckling load and nonlinear load of Corn Stalk Recombinant Glulam axial compression member decrease gradually with the increase of axial compression member height.The variation law of load-displacement curve of axial compression member is basically the same,and both transverse displacement and axial displacement follow thechange of load-displacement curve.As a result of the increase in height.Therefore,the Corn Stalk Recombinant Glulam is similar to that of the glued wood.Finally,Analysis on the premise of strength theory and stability theory.Based on the Euler critical force and the calculation method of glued wood structure,the results are compared according to the results of ABAQUS finite element method.The calculation method of bearing capacity of the axial compression member of Corn Stalk Recombinant Glulam under different slenderness ratio is analyzed and determined.In this paper,the related indexes of Corn Stalk Recombinant Glulam as structural material and the related performance of axial compression component were studied creatively,which laid a theoretical foundation for the application of Corn Stalk Recombinant Glulam as structural material.It is helpful to popularize the material in the building structure.The research results of this paper will fill the blank in the field of design and application of Corn Stalk Recombinant Glulam as structural material in our country.Therefore,the study of this paper has important theoretical significance and broad application prospects. |
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