Actuator Parallel Loading Test Device

Abstract

The invention relates to an actuator parallel loading test device, comprising: a dynamic loading device, a pressure beam connected to the dynamic loading device, a loading beam connected to a test piece, and a hinge joint connecting the pressure beam and the loading beam, wherein, The pressure beam and the loading beam are symmetrically distributed along the force transmission direction of the power loading device. During the loading test, the specimen is firmly connected to the loading beam, and the resultant force applied by the multiple actuators is at the point of action , the hinge center point of the pressure beam and the loading beam, the center of the loading beam and the stiffness center of the test piece are all on the same straight line. The invention realizes the parallel synchronous loading of multiple actuators through the setting of the pressure beam and the articulated joint, and solves the problem that the large tonnage loading is limited by the range of a single actuator and the rigid connection is easy to generate extra torque due to the asynchronous actuators problem, and minimize the torsional eccentricity and limit the torsional deformation of the specimen, and eliminate the torsional effect of the specimen caused by the load.

Description

technical field [0001] The invention relates to the technical field of civil engineering structure test devices, in particular to an actuator parallel loading test device. Background technique [0002] In the concrete structure, steel structure and composite structure system, rectangular section walls, columns, beams and other components are usually combined into T-shaped, I-shaped, C-shaped and L-shaped composite cross-section forms to meet the building function and structural requirements. Force requirements, such as winged walls with edge members, corner walls, special-shaped columns, T-shaped beams, etc. The application of special-shaped composite cross-section members is very extensive, and its mechanical properties are the focus and hot spot of structural engineering experimental research. However, in the process of performing mechanical performance tests on these special-shaped composite cross-section specimens, there are mainly two problems: on the one hand, due to ...

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Problems solved by technology

However, in the process of performing mechanical performance tests on these special-shaped composite cross-section specimens, there are mainly two problems: on the one hand, due to the existence of flanges, the special-shaped composite cross-section specimens often have high ultimate bearing capacity, especially is a full-scale model specimen; on the other hand, due to the asymmetry of the special-shaped composite section, these specimens are prone to torsion effects under load, and the greater the load, the more obvious the torsion effect

However, in the traditional multi-actuator parallel connection method, multiple actuators are connected to the specimen through a rigid connection device, and the out-of-synchronization of multiple actuators may cause the specimen with special-shaped combined cross-section to bear additional torque, which will further Influence of Accelerated Torsion Effect on Test Results

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