Fabricated loading device for beam-column connection semi-rigid joint test

Abstract

The invention discloses an assembly type loading device for a beam-column connection semi-rigid joint test, which comprises a constraint unit, a support unit and a loading unit arranged on the support unit, and is characterized in that the support unit comprises a first column type reaction frame and a first reaction beam arranged on the first column type reaction frame; the loading unit comprises a first loader arranged on the first counter-force beam, the restraining unit comprises a beam end clamp and a restraining frame for limiting the beam end clamp in the horizontal direction, and the loader is connected with the beam end clamp; according to the invention, the constraint frame is arranged, the beam end clamp is limited in the horizontal direction, and the beam end is clamped through the beam end clamp, so that out-of-plane displacement of the beam end in the loading process is avoided, the test accuracy can be improved, loading equipment and testers are protected, and the safety of the testers and the equipment in the test loading period is improved; in addition, the supporting units, the column end connecting beams and the constraint frame are all formed by module assembling, and the universality of the loading equipment is improved.

Description

technical field [0001] The invention relates to the technical field of test loading devices, in particular to an assembled loading device for semi-rigid joint tests of beam-column connections. Background technique [0002] The prefabricated building steel structure has gradually become a trend of building development and reform under the vigorous promotion of national policies. This type of building can minimize on-site wet work, and at the same time save energy and building materials, which is in line with my country's promotion of green buildings and energy conservation. The general policy of construction is an important means for my country's construction industry to realize the new industrialization reform. As a key part of the prefabricated building steel structure, the beam-column connection node is crucial to the overall performance of the structure, and its bearing capacity and energy dissipation capacity directly affect the seismic performance of the entire building....

AI Technical Summary

Problems solved by technology

Although the existing loading test methods and devices can apply unidirectional or reciprocating loads to the nodes, the equipment needs to be customized according to requirements, the size of the components is large, the transportation and installation are troublesome, and the cost is high; in addition, due to the assembly errors and Initial defects, after the loading starts, the nodes may be unevenly loaded, resulting in out-of-plane displacement at the beam end far away from the node, causing the hydraulic actuator and other loading equipment to tilt, and the beam end and the node are subjected to additional torque

At this time, if the loading continues, the nodes are no longer only affected by the in-plane bending moment, which causes a large deviation in the test data. At the same time, the hydraulic actuator is prone to failure and damage after being tilted, and at the same time, it poses a safety hazard to the test personnel.

[0004] For example, in the loading device for space-assembled semi-rigid joint test with the publication number CN106596251A, when the beam end is loaded, there is no constraint on the beam end, so that the beam end is prone to be out of plane during the beam end loading process. Displacement, which in turn leads to the problem of large deviations in the test data; another example is the adjustable frame node seismic test loading device with the publication number CN107727343A, which also has the above problems

[0005] In order to solve the above problems, the present invention provides a prefabricated loading device for semi-rigid joint tests of beam-column connections, to solve the problem of large deviations in test data of previous test loading devices, and at the same time, use modularized prefabricated loading equipment , to improve the versatility of loading equipment, make it easy to turnaround installation, expand its scope of application, and be able to be used for different scales and types of tests

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