Vibration table substructure test method based on three-parameter control AMD

A technology of structural test and test method, which is applied in the field of structural test, can solve the problems of low control precision and high actuator stroke requirements, achieve the effects of low stroke requirements, reduce test cost, and improve test accuracy

CN107907283AActive Publication Date: 2018-04-13BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-04-13

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Abstract

The invention discloses a vibration table substructure test method based on three-parameter control AMD, which belongs to the technical field of structure test and can be used in anti-seismic test ofmulti-story and high-rise building structures. On the basis of the existing hybrid experimental research, an AMD loading device (also called an active mass driver) is used as a means of applying an interface force between a numerical substructure and an experimental substructure, and the control precision of the AMD loading device is improved through a three-parameter control algorithm. Compared with the existing vibration table substructure test method, the test method disclosed by the invention has the advantages as follows: the test conditions can be easily met (no additional counterforce wall is needed); a vertical self-weight effect is provided while the problem of inertia mass loading is solved and the influence of the high-order vibration mode of an upper substructure is neglected (the mass of the AMD loading device can provide a weight); the test precision is high (the high-frequency performance of three-parameter control is excellent); the requirement on the stroke of an actuator is low (there is no need to track the displacement of the board of a seismic simulation vibration table).
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Description

technical field

[0001] The invention relates to an earthquake simulation shaking table test method, which belongs to the technical field of structural tests. Background technique

[0002] Earthquake simulation shaking table is a kind of test equipment widely used in anti-seismic technology research and performance testing of building structures, bridges, underground structures, electrical equipment and other structures, structures and auxiliary facilities. Due to the limitation of the size and bearing capacity of the shaking table surface, conventional shaking table tests generally need to scale down the test object, and some large-scale structures cannot even be realized due to the limitation of the size and performance of the shaking table. In order to overcome the problems of large specimen size and high requirements on the performance of the shaking table in the shaking table test, a substructure test method based on the seismic simulation shaking table was developed. T...

Examples

Embodiment Construction

[0033] In order to clearly and explicitly illustrate the principles, technical solutions and application effects of the present invention, the present invention will be described in detail below through specific examples. The embodiments provided here are only used to illustrate the purpose of the present invention, not to limit the technical solution of the present invention.

[0034] 1) Substructure splitting

[0035] refer to figure 1 , choose the 5-story shear frame structure as the test model, choose the bottom two-story structure as the experimental substructure 2, and the top three-story structure as the numerical substructure 3, the differential equation of motion of the overall structure 1 is shown in formula (1) :

[0036]

[0037] where m i , c i , k i , i=1,2...5 represent the lumped mass, interlayer damping coefficient and interlayer stiffness of each layer structure respectively, x i , are the displacement, velocity and acceleration of the correspondin...