Test piece loading test device

Abstract

The invention relates to a test piece loading test device. The device comprises a power loading device, a pressing beam connected with the power loading device, a loading beam connected with a test piece, and a hinge joint for connecting the pressing beam with the loading beam, wherein the pressing beam and the loading beam are symmetrically distributed in the force transmission direction of the power loading device; when a loading test is carried out, the test piece is firmly connected with the loading beam, and a resultant force acting point applied by the actuators, a hinge center point ofthe pressing beam and the loading beam, the center of the loading beam and the rigidity center of the test piece are located on the same straight line. According to the invention, the parallel synchronous loading of a plurality of actuators is realized through the arrangement of the pressing beam and the hinge joint; the problem that large-tonnage loading is limited by the range of a single actuator and the problem that rigid connection is prone to generating extra torque due to desynchrony of the actuators are solved, the torsional eccentric distance is reduced to the maximum extent, torsional deformation of the test piece is limited, and the torsional effect, caused by loads, of the test piece is eliminated.

Description

technical field [0001] The invention relates to the technical field of civil engineering structure test devices, in particular to a test piece 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 the exis...

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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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