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Shear strength tester and method for testing shear strength

A technology of shear strength and test method, which is applied in the direction of using a stable shear force to test the strength of materials, etc., can solve problems such as the inability to obtain the theoretical anchoring length of the slats, and achieve the effect of simple structure, simple operation and easy maintenance.

Inactive Publication Date: 2010-08-04
SHANDONG PROVINCIAL ACAD OF BUILDING RES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Without the shear strength parameter between the slab and the concrete, the theoretical anchorage length of the slab in the concrete cannot be obtained, and the anchorage lengths taken in the current reinforcement codes are half estimated and half empirical values

Method used

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  • Shear strength tester and method for testing shear strength
  • Shear strength tester and method for testing shear strength
  • Shear strength tester and method for testing shear strength

Examples

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Embodiment Construction

[0039] Such as Figure 1-2 As shown, a shear strength tester includes a shear bracket, a force measuring rod 3, and an indicator 5, and is characterized in that the shear bracket includes a left side that is symmetrically arranged on both sides of the rotating shaft 2 in an inverted figure-of-eight shape. Support 6 and right support 7, described left support 6 and right support 7 front parts are hinged on rotating shaft 2 and naturally extend to the front of rotating shaft 2 to join, and right support 7 rear end is hinged on rotating shaft 2 axis vertical planes The swinging force measuring rod 3 is provided with a vertical groove 16 at the rear end of the left bracket 6, and the vertical groove 16 is adapted to the force measuring rod 3, and the other end of the force measuring rod 3 is provided with a screw rod and a nut 4 adapted to the screw rod; A tension-compression sensor is arranged in the force measuring rod 3 , and the tension-compression sensor is electrically conne...

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Abstract

The invention relates to a shear strength tester and a method for testing the shear strength, belonging to a special instrument and a method for testing the cementation shear strength between a strip and an original concrete structure when the concrete structure adopts a superficial layer to inlay high-strength strip or the high-strength strip is bonded on the surface in an engineering structure reinforcing and reforming project. The tester comprises a dynamometry link, a shear bracket and a scaling instrument. The end part of the shear bracket is tensioned by screwing a bolt of the dynamometry link; the strip after bonding is sheared by an actuating boot to cement with the concrete interface; the size of the shear force is tested by adopting a pull pressure sensor arranged inside the dynamometry link; and the maximum shear force is displayed by the scaling instrument. The anchoring length can be theoretically calculated by the shear strength tested by the device. The device has the advantages of simple structure, accurate actuation, simple and convenient operation, easy maintenance, and the like, does not need external power source and can be used under various environments.

Description

technical field [0001] The invention relates to building structure detection equipment and a detection method, in particular to a shear strength tester and a shear strength test method for testing the bonding shear strength between laths and concrete. Background technique [0002] In engineering structure reinforcement and transformation projects, there are technical measures to adopt shallow embedding or sticking lath on the surface. Such measures can greatly improve the bearing capacity of the concrete structure by using the good tensile strength of the slats by pasting them. The tension provided by the slats is transmitted to the concrete structure through the bonding of the structural adhesive, and there is a large shear stress between the slats and the structural adhesive, and between the structural adhesive and the concrete interface. The key to reinforcement is whether the shear strength of the slats and the original concrete structure can meet the design requirement...

Claims

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Application Information

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IPC IPC(8): G01N3/24
Inventor 崔士起成勃陈莉
Owner SHANDONG PROVINCIAL ACAD OF BUILDING RES
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