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Steel pipe-FRP pipe core concrete combination structure

A combined structure and concrete technology, applied in the direction of columns, piers, pillars, etc., can solve the problems of reducing the effective use space, increasing the self-weight of components, and large cross-section of components, reducing the cost of construction formwork, improving the strength and rigidity, and the stress. Good performance and shock resistance

Active Publication Date: 2008-05-14
HEFEI UNIV OF TECH
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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 component, and the section of the component is also larger, which reduces the effective use space of buildings and structures

Method used

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  • Steel pipe-FRP pipe core concrete combination structure

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Embodiment Construction

[0016] Referring to FIG. 1 , a hollow column is formed by a steel pipe 1 as an outer wall, an FRP core pipe 3 as an inner wall, and a concrete layer 2 consolidated between the steel pipe 1 and the FRP core pipe 3 .

[0017] In a specific implementation, the cross-sectional form of the composite structure is any combination between the circular, square or rectangular steel pipe 1 and the circular, square or rectangular FRP core pipe 3 . include:

[0018] The circular FRP core pipe with circular steel pipe jacket shown in Figure 1 is filled with concrete structure;

[0019] The circular steel pipe sleeve square FRP core pipe filled with concrete structure shown in Figure 2;

[0020] The circular steel pipe sleeve rectangular FRP core pipe shown in Figure 3 is filled with concrete structure;

[0021] The square steel pipe sleeve circular FRP core pipe shown in Figure 4 is filled with concrete structure;

[0022] The square steel pipe sleeve square FRP core pipe filled with con...

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Abstract

The invention relates to the composite structure of a steel pipe-FRP with concrete being filled inside, which is characterized in that the composite structure is a hollow pipe column which comprises a steel pipe used as a lateral wall, an FRP barrel used as a inside wall and a concrete layer which is fixedly connected between the steel 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, which is especially suitable for the pole and bracing members of buildings, bridges and special structures.

Description

technical field [0001] The invention relates to a pipe material, more specifically, it is used in the technical field of structural engineering and can be used for reinforcement and transformation projects; it is especially suitable for columns and support members of buildings, bridges and special structures. 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. [0003] In actual engineering, solid steel pipe concrete or FRP pipe concrete is usually ...

Claims

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Application Information

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IPC IPC(8): E04C3/30E04C3/36
Inventor 王静峰
Owner HEFEI UNIV OF TECH
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