Bamboo composite pipe-steel pipe internal-external constraint concrete composite structure

A technology for constraining concrete and composite structures, applied in the direction of columns, pier columns, pillars, etc., can solve the problems of reduced structural bearing capacity, consumption of mineral resources, and non-recyclability, etc., to improve deformation capacity, reduce environmental pollution, and improve stability Effect

CN106592869APending Publication Date: 2017-04-26NANJING FORESTRY UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-04-26

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Abstract

The invention discloses a bamboo composite pipe-steel pipe internal-external constraint concrete composite structure. The bamboo composite pipe-steel pipe internal-external constraint concrete composite structure is characterized in that the cross section of the bamboo composite pipe-steel pipe internal-external constraint concrete composite structure is sequentially composed of a bamboo composite pipe (1), sandwich concrete (2) and an inner steel pipe (3) from outside to inside; the bamboo composite pipe (1) sequentially comprises an isolating layer (11), a bamboo fiber strengthened composite layer (12) and an outer protective layer (13) from inside to outside; the bamboo fiber strengthened composite layer (12) is formed by continuously and evenly winding and solidifying one or more layers of bamboo fibers which are impregnated with resin adhesive on the outer wall of the isolating layer (11); the included angle between the fiber direction of the bamboo fibers and the circumferential direction of the bamboo composite pipe (1) ranges from minus 45 degrees to 45 degrees; the outer surface of the bamboo fiber strengthened composite layer (12) is coated with the outer protective layer (13); the inner steel pipe (3) is located in the cross section; the space between the bamboo composite pipe(1) and the inner steel pipe (3) is filled with the sandwich concrete (2); and the inner steel pipe (3) is internally hollow. The structure is high in bearing capacity, good in stiffness, ductility and shock resistance and has good construction performance and durability, the cross section inertia moment is large, concrete consumption is low, and construction cost is low; and the sustainable bamboo source in China is sufficiently utilized, and property advantages good toughness and high longitudinal tension strength of bamboo t are brought into play to the maximum extent.
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Description

technical field

[0001] The invention belongs to the technical field of civil engineering structures, and in particular relates to a concrete composite structure, in particular to a bamboo composite pipe-steel pipe internally and externally constrained concrete composite structure. Background technique

[0002] The concrete-filled steel tube structure is a new composite structure formed by filling concrete into steel tubes. Since the steel tube concrete structure can more effectively utilize the respective advantages of steel and concrete, the concrete can be placed in a three-dimensional compression state in the structure, and its compressive strength can be doubled, while overcoming the local buckling of the steel tube structure The disadvantages of engineering applications are becoming more and more extensive. Solid steel tube concrete is usually used for axial compression or compression-bending members with small load eccentricity. However, when the slenderness ratio of...

Examples

Embodiment Construction

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. The invention provides a bamboo composite pipe-steel pipe inner and outer constrained concrete composite structure, which is characterized in that its cross section is composed of bamboo composite pipe 1, interlayer concrete 2 and inner steel pipe 3 from outside to inside, and the bamboo composite pipe 1 is sequentially from inside to outside Including an isolation layer 11, a bamboo fiber reinforced composite layer 12 and an outer protective layer 13, wherein the isolation layer 11 is continuously and uniformly wound and solidified by bamboo fiber mat, glass fiber mat, basalt fiber mat or bamboo fiber non-woven fabric impregnated with resin glue, Bamboo fiber-reinforced composite layer 12 is formed by continuous and uniform winding...