Feedback control device and method for space lateral constrained loading of test member

Abstract

The invention discloses a feedback control device and method for space lateral constrained loading of a test member. The feedback control device comprises a group of loading devices and a group of restraining devices, wherein the group of loading devices is arranged on one longitudinal side of the test member; each loading device is arranged corresponding to the nodes of the test member to apply load in the main loading direction to the nodes; the group of restraining devices is arranged on one transverse side of the test member to constrain the lateral displacement of the nodes; a first displacement measuring device is arranged on an opposite side of each restraining device; the first displacement measuring devices are used for measuring the actual lateral restraint displacement at the corresponding positions of the test member; a second displacement measuring device is arranged on an opposite side of each group of loading devices; and the second displacement measuring device is usedfor measuring the displacement in the actual main loading direction of the corresponding node on the test member. Through adoption of the feedback control device and method, the technical problems ofdifficulty in accurately reproducing the boundary conditions of component constraints in traditional tests and low accuracy and reliability of the test results are solved.

Description

technical field [0001] The invention relates to the field of experimental mechanics, in particular to a deformation component feedback control method of a test member of a civil engineering structure under spatial lateral constraint loading. Background technique [0002] Due to the huge size of building structures, it is difficult to carry out full-scale structural tests due to the constraints of economy and test environment. At present, the commonly used test methods generally select the key parts of the structure or the parts with complex stress concentration for research. It is inevitable to restore the real force state of the boundary of the structural components selected in this way for mechanical performance research, that is, to reproduce the boundary conditions of the components. However, limited by technical conditions, usually only the sensitive degrees of freedom in the component boundary degrees of freedom are constrained by nodes. Displacement and rotation ang...

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a deformation component feedback control device and control method for spatial lateral restraint loading, to solve the technical problems that the boundary conditions are difficult to accurately reproduce and the accuracy of the test results is low in the traditional test method

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