Test device for applying axial tensile load to concrete members

Abstract

A test device for applying axial tensile loads to concrete members, including concrete axial tension specimens, load-bearing steel plates installed at both ends of the concrete axial tension specimens, T-shaped embedded parts with internal threads, load-bearing screws and strain gauges, concrete axial tension specimens The test piece is provided with reserved through holes arranged in the axial direction, and multiple T-shaped embedded parts are pre-embedded at both ends of the concrete axial tension test piece, and the threaded section of the T-shaped embedded parts points to the outside of the concrete axial tension test piece; Through the reserved through holes, nuts are arranged at both ends of the load-bearing screw, and the outside of the nut is equipped with a load-bearing steel plate. The threaded section of the T-shaped embedded part is screwed with the fastening bolt; the strain gauge is installed on the side wall of the concrete axial tension test piece. The signal output terminal of the strain gauge is electrically connected with the external strain gauge. The beneficial effects of the present invention are mainly manifested in: the loading device can overcome the difficulty of applying axial load, the operation is simple, the cost is low, it does not rust, and can be reused; The size is easy to control.

Description

technical field [0001] The invention relates to a test device for applying axial tensile load to a concrete member. Background technique [0002] Concrete structures in service work under the joint action of load and environment, and the research results of concrete durability under no load cannot reasonably reflect the actual state of the structure. Concrete structures are often subjected to erosion such as seawater, deicing salt, and carbon dioxide while bearing loads. Under the coupling effects of load and environmental factors or multiple factors, concrete structures often fail before reaching the design life. The huge economic loss and casualties caused by it have aroused widespread concern both at home and abroad. Concrete is a typical porous material, and the corrosive medium invades the interior of the concrete through the pores of the concrete, which leads to corrosion of steel bars and cracking of the concrete protective layer, which in turn affects the service pe...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of the existing concrete member axial tension load loading method, the present invention provides a small volume, simple operation, reliable method and low cost, which is convenient for concrete members to apply axial tensile load, and can be in erosion together with the concrete member Apparatus for applying axial tensile loads to concrete members subjected to media erosion tests

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