Bamboo plywood beam structure

Abstract

The invention discloses a bamboo plywood beam structure, which comprises an upper flange board, a web board and a lower flange board which are made of bamboo plywood and sequentially connected, wherein the upper flange board is formed by connecting an upper flange outer board and an upper flange inner board positioned on the lower side of the upper flange outer board; the lower flange board is formed by connecting a lower flange outer board and a lower flange inner board positioned on the upper side of the lower flange outer board; the web board comprises a plurality of superposed single web boards; and tenons arranged at intervals are arranged on the surface of each single web board opposite to the inner boards, the tenons on two adjacent single web boards are staggered, the upper flange inner board and the lower flange inner board are provided with mortises matched with the size and the distribution position of the tenons, and the tenons are embedded into the mortises. The bamboo plywood beam structure has large anti-shearing bearing capacity, and is simple in structure and easy to manufacture; the number of the composing unit boards can be adjusted according to the magnitude of the shearing force borne by a beam; and the integrity of the transverse H-shaped beam can be improved.

Description

technical field [0001] The invention belongs to the technical field of bridge structures, and relates to a bamboo glue board beam structure suitable for I-shaped and T-shaped beams. Background technique [0002] At present, there is a connection method of tenon joint in wood structure, but tenon joint is only used for simple connection of components, not for bearing shear force. The mortise joint of the shear connector according to the present invention mainly bears the effect of shear force through the extrusion deformation between the two rows of mortises and mortises, and the mortises are made with a certain inclination angle according to the stress characteristics of the beam, which is used to It bears the lifting force between the web and the flange plate when the beam is flexed. [0003] Existing bamboo plywood is mainly used as a building formwork with low added value in the civil construction market, and has not been used in load-bearing structures as a main structu...

AI Technical Summary

Problems solved by technology

[0005] If glue is used for bonding, the adhesive will be destroyed before the I-shaped beam material is damaged due to insufficient shear strength of the glue, which will lead to the decline of the integrity of the I-shaped beam, the reduction of the bearing capacity of the beam, and the beam cannot play the role of the material. ultimate bearing capacity

If a mechanical connection is used, such as angle steel, when the external load applied to the beam reaches a certain value (the ultimate bearing capacity of the material has not been reached), the web of the beam will undergo local buckling failure, resulting in a reduction in the bearing capacity of the beam and failure to exert The ultimate bearing capacity of the material

If bonding and mechanical connection are combined, due to the difference in deformation properties of the two connection methods, the bonding method of the adhesive layer will be damaged first, and then the mechanical connection will begin to exert its load-bearing performance, and the two cannot coordinate the force together

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