Light weight assembly type bamboo-concrete built-up beam

Abstract

The invention discloses a light weight assembly type bamboo-concrete built-up beam. The light weight assembly type bamboo-concrete built-up beam is characterized in that a precast concrete plank (1) is combined with a bamboo beam (2) through a composite shear force connector (3), and a light concrete composite layer (5) is poured on the upper part; pre-embedded bamboo blocks (6) are arranged on the precast concrete plank (1), and bolts (4) penetrate through the pre-embedded bamboo blocks (6) from the top and are fixed in the bamboo beam (2); and the composite shear force connector (3) is composed of a steel core bar (7) and outer wrapped ultra-high performance concrete (8). The light weight assembly type bamboo-concrete built-up beam has the advantages that the self-weight is small, the integrality is good, producing technology is simple, the assembling efficiency is high, and the flexural rigidity is high.

Description

technical field [0001] The invention relates to a lightweight bamboo-wood-concrete composite beam suitable for assembly construction, which belongs to the field of building structures in civil engineering. Background technique [0002] In the prefabricated bamboo-wood-concrete composite beam, the upper concrete slab and the lower bamboo-wood beam are combined through the middle shear connectors to realize mutual work. There are currently two assembly methods: one is that during the prefabrication process of the concrete slab, the connectors are anchored in the concrete slab in a pre-embedded manner, and then the upper and lower components are connected by bolts or nails at the construction site; the other One is to reserve installation holes or pre-embedded wooden blocks in the concrete slab, so that the concrete slab has the conditions that the connectors can penetrate, and then use nails or screws on site to assemble the concrete slab and bamboo beams to form a whole. The...

AI Technical Summary

Problems solved by technology

These prefabricated composite beams all have performance deficiencies: for the former prefabricated composite beam, the pre-embedded accuracy of the connectors is greatly affected by the pouring concrete slab, which is difficult to control, resulting in difficulties in on-site assembly

For the latter type of composite beam, if the assembly construction is realized in the form of reserved channels, the reserved channels of the concrete slab must correspond to the drilling positions in the bamboo and wood beams one by one, which requires high positioning accuracy and difficult component processing Large, low efficiency; if the assembly construction is realized in the form of pre-embedded wood blocks, pins can only be used as connectors, and the pin connection stiffness is low, which will easily lead to low bending stiffness and excessive deformation of the composite beam

In addition, prefabricated concrete slabs also have the problem of self-heaviness, which leads to difficulties in on-site assembly, and the self-heaviness of components will reduce the ability to bear external loads, and it is also very unfavorable to the earthquake resistance of the structure

Furthermore, in the general prefabricated bamboo-concrete composite beam, there are inevitably gaps between the precast concrete slats, and the integrity of the floor slab is poor, which seriously affects the overall rigidity of the structure

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