Low-frequency cyclic loading test device

Abstract

The invention provides a low-frequency cyclic loading test device which comprises a reaction frame, a ground beam and a distribution beam. The reaction frame is used for exerting vertical force on a to-be-tested piece so as to prevent the to-be-tested piece from jumping in the vertical direction; the ground beam is used for fixedly positioning the to-be-tested piece from the bottom of the to-be-tested piece; the distribution beam is arranged at the force output end of the reaction frame and is used for fixedly positioning the to-be-tested piece from the upper portion of the to-be-tested piece; a first horizontal actuator used for exerting horizontal vibration control force on the to-be-tested piece through the ground beam is arranged at the beam end of the ground beam, and / or a second horizontal actuator used for exerting horizontal vibration control force on the to-be-tested piece through the distribution beam is arranged at the beam end of the distribution beam. The situation that the reaction frame is disassembled for multiple times due to different dimensions of to-be-tested pieces is avoided; low-frequency cyclic loading tests and push-pull of the pieces can be completed by assembling the actuator on one side of the device.

Description

technical field [0001] The invention relates to the technical field of civil engineering tests, in particular to a reusable low cycle repeated load test device for civil engineering model tests. Background technique [0002] The anti-seismic performance of structures is a hot research topic now, and the structural model test is an effective means to study the anti-seismic performance of structures. Currently, the main methods used to test the seismic performance of structures include shaking table tests and low-cycle repeated load tests. Due to the limitation of the size of the shaking table and the loading capacity, the test model often needs to take a larger scale ratio, and there is a certain gap between the material properties of the model and the prototype structure, and the construction and operation costs of the shaking table test system are relatively high, so the low-cycle The repeated load test method is still the mainstream method currently used. [0003] The lo...

AI Technical Summary

Problems solved by technology

After the test piece is completed, neither the ground beam nor the distribution beam can be reused, which causes a lot of waste of manpower, material resources, financial resources and time, and increases the difficulty of transporting the test piece

In addition, when the laboratory site conditions are limited and only one side has the actuating head, it is necessary to make an additional test auxiliary device according to the size of the specimen to complete the application of the reciprocating load, which also causes inconvenience to the smooth implementation of the test

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