Portable drawing-type testing device and drawing-type testing method for testing adhesive property steel bar and concrete

Abstract

The invention discloses a portable drawing-type testing device and a drawing-type testing method for testing adhesive property of a steel bar and concrete. The bottom of a hydraulic jack is mounted on an upper crossbeam of a dismountable outer frame; the top of the hydraulic jack is connected with one end of a load sensor; the middle part of a steel bar is positioned inside a concrete sample; the upper part and the lower part of the steel bar are positioned outside the concrete sample; a deformeter is connected with two displacement meters and the load sensor; the other end of the load sensor is connected with a top plate; a groove is formed in a base plate; the concrete sample is placed on the base plate; the lower part of the steel bar passes through the groove; a lower chuck is mounted on a floor beam and used for clamping the lower part of the steel bar; two magnetic gauge stands are respectively mounted on side plates; the two displacement meters are respectively mounted on the two magnetic gauge stands; one displacement meter is connected with the upper surface of the concrete sample, and the other displacement meter is connected with the top of the steel bar. The device disclosed by the invention has few components and is light in weight, simple, reliable and quite convenient to carry.

Description

technical field [0001] The invention relates to a test device and method for the bonding performance of steel bars and concrete, belonging to the field of concrete construction. Background technique [0002] In the field of civil engineering, the bonding performance between steel bars and concrete is the prerequisite for the bearing of reinforced concrete structures or components. In existing projects, there are many slippages due to the bond degradation between steel bars and concrete, which eventually lead to major engineering accidents. Bonding of reinforced concrete structures is of great significance in engineering practice. The degradation of bonding is the main reason for the decrease of component strength, the degradation of stiffness and the increase of deformation. [0003] The patent literature of CN203216831U discloses a portable test device for the bonding performance of steel bars and concrete. The test device uses steel plates to fix the concrete specimens o...

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Problems solved by technology

[0003] The patent literature of CN203216831U discloses a portable test device for the bonding performance of steel bars and concrete. The test device uses steel plates to fix the concrete specimens on two supports through the steel plates, and fix the two supports on the frame. On the bottom beam, the required accessories are large and heavy, making it inconvenient to carry

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