Steel-alkali-activated UHPC composite structure, prefabricated alkali-activated UHPC board and connecting piece

Abstract

The invention discloses a steel-alkali activated UHPC composite structure, a prefabricated alkali activated UHPC board and a connecting piece. The steel-alkali activated UHPC composite structure comprises a steel beam and a prefabricated alkali activated UHPC plate covering the steel beam, and the steel beam and the prefabricated alkali activated UHPC plate are connected through a shearing force connecting piece pre-buried in the concrete plate; and the prefabricated alkali-activated UHPC board is made of alkali-activated ultra-high performance concrete. The structure is reasonable in stress, high in strength, large in rigidity and high in construction operability, each component of the component is further detachably recycled, an alkali-activated material is used for replacing a gel material of Portland cement, the industrial byproduct slag can be effectively utilized, carbon emission and environmental pollution in the whole production and construction process can be greatly reduced, and the concept of green low-carbon cyclic development is met.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a steel-alkali excited UHPC combined structure, a prefabricated alkali excited UHPC board and a connecting piece. Background technique [0002] As a new type of structure, steel-concrete composite beams are mainly composed of concrete flanges, steel beams and shear connectors connecting the two materials. It makes full use of the advantages of steel structures and concrete structures. Compared with it, it has higher technical advantages and economic benefits. Welding studs are the most commonly used shear connectors in steel-concrete composite structure bridges. During the welding process, welding residual stress will be generated in the components, which will adversely affect the structural bearing capacity, stability and fatigue performance. The composite structure is difficult to replace after damage, which seriously affects the life and cycle per...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of the existing technology, a steel-alkali excited UHPC composite structure, prefabricated alkali excited UHPC board and connectors are provided. This structure not only has reasonable force, high strength and high rigidity, but also effectively avoids The occurrence of diseases, strong construction operability, easy factory mass production, avoid concrete damage caused by insufficient maintenance during on-site pouring, and can solve the problem of low service life of the existing steel-concrete composite structure, and further realize the realization of various components It can be disassembled and recycled, so it is more suitable for practical use and has industrial utilization value

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