Combined type connected bamboo-concrete combined beam and manufacturing method

Abstract

The invention discloses acombined type connected bamboo-concrete combined beam. The combined type connected bamboo-concrete combined beam comprises a bamboo beam, a concrete plate, bamboo pipes,high strength filling materials and reinforcing ribs, the concrete plate is located on the upper part of the bamboo beam, the outer side surfaces of the middle and lower parts of the bamboo pipesare bondedand fixed into bamboo holesby applying an adhesive in an embedded mode, reserved holes are formed in the positions, corresponding to the bamboo holes of the bamboo beam, of the concrete plate, and thereserved holes change in the shape of steps with large upper parts and small lower parts.The reinforcing ribs are arranged in the bamboo pipes in the longitudinal direction of the bamboo pipes,the reserved holes of the concrete plate and the bamboo pipes are filled with the high strength filling materials, and thereinforcing ribs are wrapped with the high strength filling materials. According tothe combined type connected bamboo-concrete combined beam, the efficient and reliable connection between the concrete plate and the bamboo beam is realized by using the combination of the natural original bamboo pipes, the reinforcing ribs and the high strength filling materials, the combination effect which can not be obtained by a single connection form is played through multiple combination connection, a ductile ideal failure mode is provided, the restriction of the natural original bamboo pipes avoids the early failure of concrete at joints, and the up and down separation of the bamboo beam from the concrete plate is effectively avoided.

Description

technical field [0001] The invention relates to a bamboo-concrete composite component, in particular to a composite-connected bamboo-concrete composite beam and a manufacturing method, belonging to the field of civil engineering. Background technique [0002] Bamboo is a natural organism with the characteristics of high strength, light weight, renewable and environmental friendliness. Compared with wood, it has higher strength-to-weight ratio, better wear resistance and relatively low water expansion rate, etc. Basic performance, the strength is 50-100% higher than that of ordinary wood, the specific strength is 1.5-2.5 times that of fir, and 2-3 times that of medium carbon steel. Our country is rich in bamboo resources, the mechanical properties of bamboo are superior, and the growth rate of bamboo is fast. It is a real renewable green resource. The development and utilization of engineering bamboo overcomes the material discreteness of raw bamboo, so that bamboo can be app...

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Problems solved by technology

[0004] Due to the material properties of bamboo, the connection between bamboo and concrete is difficult to achieve a completely rigid connection between bamboo and concrete or to achieve better rigidity and better ductility at the same time. For example, Chinese patent "201220551921.3" discloses a semi-assembled Bamboo-concrete composite bridge, the cast-in-place concrete layer is mechanically engaged with the bamboo longitudinal beams and bamboo beams through the notches of the longitudinal beams and the notches of the beams respectively, and there are metal parts in the notches of the longitudinal beams and the notches of the beams to ensure that the cast-in-place concrete layer, bamboo longitudinal beams and bamboo crossbeams work together. However, the notch of the composite beam is set at the full width of the cross section to cause greater damage to the bamboo longitudinal beams and bamboo crossbeams. Formwork needs to be specially set up for the mouth making, and the construction is complicated. The metal parts are placed inside the recessed concrete, and the recessed concrete lacks necessary constraints. During the load-bearing process, due to the cracking of the recessed concrete, the metal parts are difficult to play a role

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