Pendulum bob type shearing-resistant impact testing machine and testing method thereof

Abstract

The invention relates to a pendulum bob type shearing-resistant impact testing machine and a testing method thereof, belonging to the technical field of concrete material testing. The pendulum bob type shearing-resistant impact testing machine can achieve accurate shearing-resistant impact testing result and wide application range, is convenient to carry, and can avoid danger to operators. The pendulum bob type shearing-resistant impact testing machine comprises a working shaft, a base, a support, a connecting frame, a pendulum bob, a pendulum rod, a graduated dial and a pointer; the testing method comprises the following steps: measuring the compressive strength of a test piece; horizontally placing the test piece on the support and recording the initial scale value of the pointer on the graduated dial; carrying out pendulum bob shearing-resistant impact on the front surface of the test piece; recording the ending scale value of the pointer on the graduated dial to obtain the difference of the initial scale value and the ending scale value; measuring a shearing-resistant impact force-displacement curve to obtain the shearing-resistant impact energy of the test piece; corresponding the shearing-resistant impact energy of the test piece to the difference of the initial value and the ending value.

Description

technical field [0001] The invention belongs to the technical field of concrete material testing, and relates to a pendulum type shear impact testing machine and a testing method. Background technique [0002] Compared with ordinary concrete, fiber reinforced concrete has significantly improved tensile strength, flexural strength (also known as bending strength, flexural strength), shear strength, and toughness. In recent years, domestic and foreign research on fiber-reinforced concrete has continued to deepen, and the application of fiber-reinforced concrete has become more and more extensive. Structures such as building beams, columns, bridges, pavements, and the ends of precast piles are mostly subjected to shear impact, and a considerable part of them belongs to bending shear impact. Therefore, it is of great practical significance to study the shear impact resistance of fiber reinforced concrete. [0003] For the experimental research on the shear impact resistance of ...

AI Technical Summary

Problems solved by technology

However, due to the lack of standard test equipment for testing shear impact resistance, designers still cannot use shear impact resistance as a design parameter

Although the Chinese patent "Magnetic switch controlled drop hammer flexural impact test bench" with application number 102680334A came out in 2012 and achieved multiple drop hammer flexural impact tests, due to repeated operations, it was time-consuming and laborious,

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