Double-rubber-layer shear test mold and operation method thereof

Abstract

The invention relates to a double-rubber-layer shear test mold and an operation method thereof, the mold comprises a square steel ring, the middle of the periphery of the square steel ring is connected with a fastening bolt through a bolt hole, a detachable fixing assembly is arranged in the square steel ring, a test piece is fixed in the middle of the square steel ring through the detachable fixing assembly and the fastening bolt, and the fixing assembly comprises a first clamping block and a second clamping block which are oppositely arranged. A test piece with double adhesive layers is vertically placed in the middle of a square steel ring, the test piece is restrained and fixed through a detachable fixing assembly, a load is applied to the test piece, structural blocks on the two sides and a middle structural block of the test piece generate relative displacement, the adhesive layers on the two sides are damaged, and then the shear strength of the test piece is measured; and the mold can realize high-precision shear strength measurement on a double-glue-layer structure, and has the advantages of simple structure, easiness in assembly and disassembly, convenience in carrying, simplicity in operation and low cost.

Description

technical field [0001] The invention relates to a civil engineering structure test device, in particular to a double glue layer shear test mold and an operation method thereof. Background technique [0002] The shear test of the adhesive layer structure is to use a universal mechanical testing machine to conduct a shear test on double adhesive layer specimens (such as wood-wood adhesive layer specimens, steel-wood adhesive layer specimens, etc.), and adopt a uniform and continuous loading method. During the test, the shear surface of the specimen is kept parallel to the load direction. After the loading test is completed, record the maximum load at the time of shear failure, and calculate the shear strength of the adhesive layer; Chinese national standard GB / T17517, European Both the standard EN392 and the American standard ASTMD905 stipulate the test standard for the compressive shear strength of the adhesive layer, but in actual operation, it is easy to have the problem th...

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Problems solved by technology

[0002] The shear test of the adhesive layer structure is to use a universal mechanical testing machine to conduct a shear test on double adhesive layer specimens (such as wood-wood adhesive layer specimens, steel-wood adhesive layer specimens, etc.), and adopt a uniform and continuous loading method. During the test, the shear surface of the specimen is kept parallel to the load direction. After the loading test is completed, record the maximum load at the time of shear failure, and calculate the shear strength of the adhesive layer; Chinese national standard GB / T17517, European Both the standard EN392 and the American standard ASTMD905 stipulate the test standard for the compressive shear strength of the adhesive layer, but in actual operation, it is easy to have the problem that the direction of the shear force and the direction of the adhesive layer are not collinear due to the moment of inertia generated by the shear force and friction force. In turn, a new stress effect is generated, and the measured results are therefore inaccurate

[0003] At present, the commonly used adhesive layer structure shear test molds are used to measure the adhesive layer shear strength of the single adhesive layer structure, but there is no mold for measuring the adhesive layer shear strength for the double adhesive layer structure. It is often difficult to directly extract accurate and effective data during testing, thus limiting the practical application of the double-layer structure

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