Control method of feedback control device for lateral restraint loading of test member space

Abstract

A feedback control device and a control method for lateral restraint loading of a test member space, wherein the feedback control device includes a loading device and a restraint device; a set of loading devices is arranged on one longitudinal side of the test member; each loading device is connected to the test member. The nodes corresponding to the test members are set to apply loads in the main loading direction to the nodes; there is a set of restraint devices, which are arranged on the lateral side of the test member to restrain the lateral displacement of the nodes; on the opposite side of each restraint device, all are arranged There is a first displacement measuring device; the first displacement measuring device is used to measure the actual lateral restraint displacement at the corresponding position on the test member; a group of second displacement measuring devices is arranged on the opposite side of each group of loading devices; the second displacement measuring device It is used to measure the actual main loading direction displacement of the corresponding node on the test member. The invention solves the technical problems that the boundary conditions constrained by the components in the traditional test are difficult to reproduce accurately and the accuracy and reliability of the test results are low.

Description

technical field [0001] The invention relates to the field of experimental mechanics, in particular to a feedback control method for deformation components 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 conduct 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 complex and concentrated parts of the structure for research. The mechanical properties of the selected structural members inevitably need to be restored to the real stress state of the member's boundary, that is, the reproduction of the member's boundary conditions. However, limited by technical conditions, only the sensitive degrees of freedom in the boundary degrees of freedom of the component are usually constrained by nodes. However, because the co...

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Problems solved by technology

[0003] The present invention proposes a control method of a feedback control device for space lateral restraint loading of test components, to solve the technical problems of difficult accurate reproduction of boundary conditions and low accuracy of test results in traditional test methods

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