Wood-concrete composite beam shear connector pushing-out testing sample

Abstract

The invention discloses a wood-concrete composite beam shear connector pushing-out testing sample. The wood-concrete composite beam shear connector pushing-out testing sample comprises a wood beam, concrete slabs, a shear connector, anchoring parts and a steel mesh reinforcement. The shear connector is anchored on the upper portion of the wood beam through the anchoring parts, the steel mesh reinforcement is laid on the upper portion of the wood beam through a supported template piece, transverse reinforcements in the steel mesh reinforcement penetrate through through-holes reserved in the shear connector, the concrete slabs are poured into the template piece with the steel mesh reinforcement and the shear connector used as a skeleton, and a wood-concrete composite beam is formed. The wood-concrete composite beam shear connector pushing-out testing sample improves the shear strength and shear stiffness of the shear connector, has good fatigue resistance performance, reduces the shear deformation of the shear connector, and overall deformation of wood-concrete composite beam is reduced; and while resisting relative slip, the raising effect between the concrete slabs and the wood beam can be effectively restrained, and good social benefits and transformation prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of new structures of civil engineering, in particular to a push-out test specimen of a wood-concrete composite beam shear connector. Background technique [0002] my country has abundant forest resources, but engineering timber that can be used for load-bearing parts is still relatively small, mainly relying on foreign imports. Therefore, at present, the construction cost of modern wooden structure buildings made of pure wood in my country is often relatively high. Combining wood with other building materials is a good choice, which can not only give full play to the advantages of each material, but also effectively reduce the cost of the project. Wood-concrete composite structure is one of the typical representatives. [0003] At present, the shear connectors of wood-concrete composite beams mainly include wood screws, planting bars, perforated metal plates, pin+groove combined connections, and PBL connect...

AI Technical Summary

Problems solved by technology

However, the research results show that most of the above-mentioned shear connectors are flexible connectors. Although the shear deformation capacity is good, their shear bearing capacity and stiffness are limited, so that the combination efficiency between wood and concrete is not high; The production and construction process of connectors with high shear bearing capacity and rigidity is relatively cumbersome, and some of them are easy to cause concrete splitting damage

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