An adjustable deflection test device suitable for fiber concrete bending toughness test

By designing an adjustable deflection test device including semi-rectangular vertical support, bracket, connecting screw, limit angle steel, control screw and point screw, the problem that existing devices cannot flexibly move and are not suitable for deflection test instruments of different sizes and specifications is solved, and the effect of flexible fixing and accurate measurement of net deflection for instruments of different types and specifications is achieved.

CN115753425BActive Publication Date: 2025-04-04CHONGQING UNIV
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Patent Information

Application Number
CN202211469234.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-11-22
Publication Date
2025-04-04
Estimated Expiration
2042-11-22

AI Technical Summary

Technical Problem

The existing deflection test device for bending toughness test of fiber concrete cannot move flexibly and is not suitable for deflection testing instruments of different sizes and specifications, resulting in the inability to accurately measure the net deflection in the middle of the span.

Method used

An adjustable deflection testing device is designed, including two semi-rectangular vertical support, two brackets, several connecting screws, two limit angle steel, several control screws, several punctual screws and parts to be tested. Through the combination of these components, the flexibility of fixing of deflection test instruments of different types and specifications is enabled, and the net deflection is ensured accurately measured.

Benefits of technology

Flexible fixation of deflection test instruments of different types and specifications ensures accurate measurement of net deflection in the span, excluding the shear or torsional effect of the specimen on its bracket, and the device can be reused.

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Abstract

An adjustable deflection test device suitable for fiber concrete bending toughness test, comprising two semi-rectangular vertical supports, two brackets, a plurality of connecting screws, two limit angles, a plurality of control screws, a plurality of punctual screws and a test piece; the present invention can solve the problem that the part used to fix the mid-span deflection test instrument in the device mentioned in the existing specifications cannot be flexibly moved, and is not suitable for deflection test instruments of different sizes and specifications. The present invention can realize convenient and flexible fixation of deflection test instruments of different types and specifications, ensure accurate measurement of the net deflection in the mid-span, excluding the shear or torsion effects of the specimen on its bracket, and can be reused. It effectively solves the disadvantage that the existing bracket for fixing the mid-span deflection test instrument requires the type of the instrument to be known in advance and a through hole reserved for clamping the instrument.
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