A reciprocating load loading device for automatically controlling axially stressed members and its application method

Abstract

The invention belongs to the field of steel structure buildings, and in particular relates to a reciprocating load loading device for automatically controlling axial force bearing members and a use method thereof. Including the external frame fixing device, the external frame fixing device is provided with a sample loading device for loading the test piece, and the sample loading device is connected with a data acquisition system; the external frame fixing device is provided with a second beam and a third beam; The specimen loading device includes a horizontal actuator, a horizontal load sensor and a connecting rod. The horizontal actuator and the horizontal load sensor are respectively connected to the data acquisition system. The left end is fixedly connected to the second beam, and the right end is connected to the test piece through the first connecting hinge. The left end of the to-be-tested piece is fixedly connected to the horizontal load sensor, the horizontal load sensor is connected to the connecting rod for relative rotation, and the connecting rod is hinged to the third beam through the second connecting hinge; the horizontal actuator, the to-be-tested piece, and the horizontal load The sensor and the connecting rod are coaxial and horizontal, and the structure is simple, which is convenient for transportation and placement.

Description

【Technical Field】 [0001] The invention belongs to the field of steel structure buildings, and in particular relates to a reciprocating load loading device and a use method of an automatically controlled axial force member. 【Background technique】 [0002] In the field of steel structure, axial force-bearing components are widely used in various load-bearing steel structures, such as roof trusses, brackets, towers, grids, lattice shells and other types of plane or space lattice systems and support systems in. The static and hysteretic performance has a great influence on the seismic performance of the overall structure. Accurate testing of the static and hysteretic performance of axially stressed members is important to reflect the deformation characteristics, stiffness degradation and energy consumption of the structure. significance. [0003] In the past, the research on the static and hysteretic performance of axial force components was mainly carried out in professional laborat...

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Problems solved by technology

[0003] In the past, the research on the static and hysteretic performance of axially stressed members was mainly carried out in professional laboratories of universities. Due to the inconvenient movement and transportation of the experimental loading device, there are certain limitations. Components cannot be tested in some specific environments

At present, there is seldom a professional portable automatic loading device for axially stressed members. At the same time, due to the initial defects such as initial bending and initial eccentricity of the axially stressed members and the lack of corresponding lateral supports, it is easy to use during the loading process. The local failure of the component occurs before the overall failure, which greatly affects the accuracy and results of the experiment

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