Steel fastener part friction test device and method for steel fastener frp reinforcement technology
A test device and technology for steel fasteners, applied in the direction of measuring devices, mechanical devices, instruments, etc., can solve the problem of no testing method for the friction of steel fastener parts
Active Publication Date: 2020-04-03
SHANDONG UNIV
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Problems solved by technology
The interface bonding effect and the pin effect can be obtained by designing corresponding tests, but there is no direct and effective test method for the friction of steel fastener parts.
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[0030] It should be pointed out that the following detailed descriptions are all illustrative and are intended to provide further explanations for the application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.
[0031] It should be noted that the terms used here are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate There are features, steps, operations, devices, components, and / or combinations thereof.
[0032] The invention discloses a steel fastener part friction test ...
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The invention discloses a steel fastener part friction testing device and method for a steel fastener FRP reinforcement technology. The testing device comprises a steel fastener part friction testing device and a tensioning end tensioning force testing device. Firstly, a steel fastener FRP joint reinforcement system is tensioned to enable an FRP plate to be stripped from a concrete interface, then continuous tensioning is performed, a steel fastener actuating pressure value is tested through a micro pressure sensor, the tensioning end tensioning force is tested through a tensioning force sensor, and finally the frictional force between the FRP plate of the steel fastener part and concrete and a frictional coefficient of a failure surface are obtained according to the principle that the stress in horizontal direction is balanced and test curve fitting. According to the testing device and method, direct exposition of a steel fastener part friction acting mechanism in the steel fastener FRP joint reinforcement system is obtained, a steel fastener FRP joint reinforcement acting mechanism is disclosed, and a solid theory foundation is laid for providing a practical design method for steel fastener FRP joint reinforcement and promoting the large-scale engineering application of the joint reinforcement technology.
Description
Technical field [0001] The invention relates to the field of reinforced concrete structures reinforced by fiber composite materials, in particular to a steel fastener part friction test device and method of the steel fastener FRP reinforcement technology. Background technique [0002] FRP (carbon fiber composite material) reinforced concrete structure is a direct reinforcement method that effectively enhances the bearing capacity of the structure. It achieves the purpose of cooperating with the two materials by pasting FRP cloth or sheet on the surface of the existing structure. With high strength and specific rigidity, light weight, good corrosion resistance, heat resistance and durability, this reinforcement method is gradually recognized by industry experts and technicians and is widely used in physical engineering. However, it has been found in the application that the bonding strength of FRP material and concrete is very low, which is prone to premature peeling of FRP and po...
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IPC IPC(8): G01N19/02
CPCG01N19/02
Inventor 张峰高磊徐向锋刘佳琪
Owner SHANDONG UNIV