Embedded concrete shear stress sensor

Abstract

The invention discloses an embedded concrete shear stress sensor. The embedded concrete shear stress sensor comprises an upper shell and a lower shell, wherein a groove is respectively formed around the interface of the upper shell and the lower shell; a soft rubber layer for connecting the upper shell and the lower shell is arranged in the groove; a sensitive beam is arranged at the lower part of the upper shell, a grooved baffle plate is arranged at the upper part of the lower shell, a sliding chute is formed in the grooved baffle plate, and one end of the sensitive beam is positioned in the sliding chute of the grooved baffle plate; a strain sensitive element for sensing deformation of the sensitive beam is arranged on the sensitive beam; and the strain sensitive element is connected with a subsequent measuring circuit through a lead to achieve the purpose of measuring the strain of the sensitive beam. By embedding the shear stress sensor in concrete, the shear stress in the concrete can be measured, thereby solving the problem of direct measurement of a shear stress in a concrete structure.

Description

technical field [0001] The invention belongs to the field of sensor technology, in particular to an embedded concrete shear stress sensor. Background technique [0002] The stress state of concrete structures is an important parameter to reflect its safety, so the stress measurement of concrete structures is an important content in the model test research and field monitoring of concrete structures. At present, concrete structure tests are generally limited to the measurement of physical quantities such as load, displacement, and strain. The measurement of stress is to measure the strain on the concrete surface by pasting the resistance strain gauge on the surface of the concrete structure, and then through the estimated elasticity of the concrete material. The stress on the concrete surface can be obtained by modulus conversion, but this method cannot obtain the accurate stress state inside the concrete. For heterogeneous materials such as concrete, the force-deformation r...

AI Technical Summary

Problems solved by technology

At present, concrete structure tests are generally limited to the measurement of physical quantities such as load, displacement, and strain. The measurement of stress is to measure the strain on the concrete surface by pasting the resistance strain gauge on the surface of the concrete structure, and then through the estimated elasticity of the concrete material. The stress on the concrete surface can be obtained by modulus conversion. This method cannot obtain the accurate stress state inside the concrete.

For heterogeneous materials such as concrete, the force-deformation relationship at the macroscopic level cannot guarantee the consistency of the theoretical analysis and test results at the internal force level. may vary greatly

Images