Hollow double-layer FRP pipe concrete combination structure

Abstract

The invention relates to the concrete composite structure of a hollow double-deck FRP pipe, which is characterized in that the composite structure comprises an outer FRP pipe used as a lateral wall, an FRP barrel used as an inside wall and a steel and concrete composite layer or a concrete layer which is used as a fixed connector between the outer FRP pipe and the FRP barrel. The invention has good structural mechanical performance and earthquake resistance, which reduces the sole weight of the structure and strengthens the bending rigidity of the structure, thereby resulting in the convenient convey of the components and quick construction and installation; the invention is applicable to strengthen the modification works and in particular to be applied to the poles and bracing members of buildings, bridges and special structures in severe environment such as ocean, marsh, alkaline land, etc.

Description

technical field [0001] The invention relates to a pipe structure, more specifically a pipe structure applied in the technical field of structural engineering, which can be used for reinforcement and transformation projects, and is especially suitable for buildings, bridges and special structures in harsh environments such as ocean, wet and saline-alkali land. Background technique [0002] FRP pipe refers to the tubular profile formed by fiber reinforced composite (FRP) through pultrusion, molding and winding production processes, which can be used in the field of structural engineering. At present, in actual engineering, concrete-filled steel tube structures and fiber-reinforced plastic FRP-confined concrete structures are widely used. The main forms include pouring concrete in steel tubes, or filling concrete in FRP tubes, or wrapping concrete with FRP cloth to form a solid section load-bearing column. In practical engineering, solid steel p...

AI Technical Summary

Problems solved by technology

However, when the component slenderness ratio or load eccentricity is large, its bearing capacity will largely be controlled by its bending stiffness. At this time, the material near the centroid of the section of solid steel pipe concrete or FRP pipe concrete cannot provide much resistance. Bending rigidity, but increases the self-weight of the member, and the section of the member is also larger

[0003] In addition, in harsh environments such as ocean, humid and saline-alkali land, when solid steel pipe concrete is used, the outer steel pipe needs to be painted with anti-corrosion paint or special anti-corrosion measures, which greatly increases the project cost and technical difficulty, and at the same time, the later maintenance cost is also relatively high. high

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