A prefabricated bamboo wood-concrete composite beam

Abstract

The invention discloses a fabricated bamboo-wood-concrete combination beam. The fabricated bamboo-wood-concrete combination beam is characterized in that a prefabricated concrete plate (1) and a bamboo-wood beam (2) are combined through steel tube-ultra high performance concrete composite shear connector (3); the steel tube-ultra high performance concrete composite shear connector (3) is characterized in that a steel tube (4) is externally wrapped with ultra-high-performance concrete (5), one end of the steel tube is the connecting end, the shape of the connecting end is a circular column, the other end of the steel tube is the anchoring end, and the shape of the anchoring end is a circular truncated cone; the prefabricated concrete plate (1) is characterized in that a preformed hole (6) is formed, and the conicity of a hole channel is the same with the conicity of the anchoring end of the steel tube-ultra high performance concrete composite shear connector (3); and the fabricated bamboo-wood-concrete combination beam is characterized in that the thread end of a tapping screw (7) is anchored in the bamboo-wood beam (2) through a hole channel in the steel tube (4), and the nut end of the tapping screw (7) is supported at the top of the steel tube (4). The fabricated bamboo-wood-concrete combination beam has the advantages of being simple in assembly way, high in construction efficiency, high in flexural rigidity, good in stretchability and the like, the good application prospect in modern bamboo-wood building and existing building reform.

Description

technical field [0001] The invention relates to an assembled bamboo-wood-concrete composite beam, which belongs to the field of building structures in civil engineering. Background technique [0002] As an energy-saving and environmentally-friendly biomass green material, bamboo and wood have excellent qualities of green, ecology, environmental protection, and low carbon. It is of great significance to form a new structural system and reduce structural energy consumption. [0003] Bamboo and wood (including glued bamboo and glued wood) materials have outstanding strength-to-weight ratio, so the bamboo and wood components made of bamboo and wood have the advantages of small structural weight and good deformation performance. However, due to the low elastic modulus of bamboo and wood materials, bamboo and wood The bending stiffness of the beam is low, and the bearing capacity is often controlled by deformation rather than the strength of the material, which greatly limits the...

AI Technical Summary

Problems solved by technology

At present, there are two main problems with prefabricated composite beams: first, the connector needs to be anchored with a component in advance, and its precise positioning is difficult to control, especially when the concrete is poured, the connector is easily displaced, which leads to difficulties in later assembly and component processing. It is difficult and inefficient, and it is difficult to promote in actual engineering; second, during assembly and construction, the shear connector itself needs to be fixed to the post-installation components by bolts and screws, and the connector needs to be stressed by these screws and bolts In order to play the role of shear force, it is difficult to fully exert the mechanical properties of the connector itself. Therefore, the bending stiffness and bearing capacity of the prefabricated composite beam are generally significantly lower than the corresponding cast-in-place composite beam

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