Three-dimensional strain rosette apparatus based on octahedron and test method

Abstract

The invention provides a three-dimensional strain rosette apparatus based on an octahedron. Six strain gauge fixing rods are arranged on the six mutually independent surfaces of an octahedral base along the normal direction, and six strain gauges are respectively attached to the strain gauge fixing rods through waterproof glue. The data wires of the six strain gauges respectively pass through the data wire holes provided in the six surfaces of the octahedral base, and pass through a wire gathering general hole provided in the bottom of the base, and the gathered wires penetrated out are connected with a data acquisition device. The invention further provides a test method for the three-dimensional strain rosette apparatus based on an octahedron. The strain state of one point in a material can be safety and rapidly obtained. The apparatus has the advantages of simple principle, stable structure and reliable calculation result. The test accuracy of three principal stresses is 1.0 rho, the test accuracy of three shear stresses is 1.22 rho, and the average test accuracy is 1.11 rho. Scientific reference values for the safety protection of a project can be provided through improvement in accuracy.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering strain testing, in particular to an octahedron-based three-dimensional strain rosette device and testing method. Background technique [0002] In general, the strain state of a material depends on the intrinsic properties and stress state of the material. To carry out online safety monitoring of large buildings, it is often necessary to evaluate and inspect the safety and reliability of the structure according to the key points of the building structure and the modal parameters of the control section such as deformation, strain, and dynamic characteristics of the structure, so as to find engineering problems in time and take Corresponding technical measures minimize the financial and human losses in the project and ensure the safety, reliability and long-term durability of the building. Therefore, the long-term, real-time and online monitoring of large-scale structures has very important p...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a three-dimensional strain rosette device and testing method based on octahedron, the purpose is to safely and quickly understand the strain state inside the material, provide a mature and reliable idea for the three-dimensional strain state test of the material, and solve the problem of the strain test in the past at the same time Lack of practice in the field and data distortion and other issues

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