Test device and method for measuring axial compression performance of composite material pipe for structural engineering

A technology for composite materials and structural engineering, applied in the direction of measuring devices, applying stable tension/pressure to test the strength of materials, analyzing materials, etc., can solve the problem of non-linearity, narrow end plate grooves, and difficulty in adapting to the diameter of fiber-wound pipes Changes in wall thickness and other issues, to achieve the effect of convenient operation, wide applicability and simple structure
CN112858025APending Publication Date: 2021-05-28SOUTH CHINA AGRI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA AGRI UNIV
Publication Date
2021-05-28

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Abstract

The invention relates to a test device for measuring the axial compression performance of a composite material pipe for structural engineering. The test device is characterized by comprising an upper end plate, a lower end plate, a semicircular steel bar, an axial strain gauge and an annular strain gauge, the upper end plate and the lower end plate are the same in structure, each of the upper end plate and the lower end plate comprises a circular end plate and a cylindrical bulge positioned in the center of the end plate, the two semicircular steel bars are fixed on the end plates through glue, an annular groove is formed between the two semicircular steel bars and the cylindrical bulge, and the groove is used for accommodating the end part of a tubular compression sample; the groove is filled with high-strength gypsum to fix the end part of the sample with the end plate; the axial strain gauge and the annular strain gauge are uniformly distributed on the outer surface of the sample around the circumference of the sample and are positioned in the middle of the sample. The invention further relates to a test method for measuring the axial compression performance of the composite material pipe for structural engineering. The device is simple in structure, flexible and convenient in test method operation, wide in applicability and high in detection precision, and belongs to the technical field of structural material performance detection in civil engineering.
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Description

technical field

[0001] The invention relates to a performance detection technology of structural materials in civil engineering, in particular to a test device and a test method for measuring the axial compression performance of composite material pipes for structural engineering. Background technique

[0002] Fiber Reinforced Polymer (FRP), as a new type of material, has excellent properties such as high strength and good corrosion resistance. It has been widely used in the field of civil engineering in recent years, and the most typical application is fiber reinforcement. The composite material pipe (hereinafter referred to as: composite material pipe) confines the concrete. The composite pipe can be made by hand by wet laying of fiber cloth, or directly by pultrusion or fiber winding. Under the action of axial pressure, the lateral expansion of concrete can be effectively restrained by the fibers arranged close to the hoop, thus greatly improving the strength and ductili...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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