Portable performance test device for automatic control of combined action of bidirectional load of beam-column joint and determination method

Abstract

The invention discloses a portable performance test device for automatic control of a combined action of a bidirectional load of a beam-column joint and a determination method. The test device comprises an outer frame fixing device, a test piece fixing device, a test piece loading device and a data acquisition system, wherein the outer frame fixing device comprises a trapezoidal horizontal counter-force frame, an I-shaped girder bearing platform, an I-shaped beam, an I-shaped upright and a prestress wire rope; the test piece loading device comprises a horizontal actuator, two vertical actuators, a hydraulic oil source, a horizontal load sensor and a vertical load sensor; the test piece fixing device comprises two steel splints, an anchor bolt rod, a column fixing base and a column bottom hinge support; and the data acquisition system comprises a controller, a multi-channel strain collector and a computer. The device, provided by the invention, has the advantages of simple structure, convenience for assembly and disassembly, and few required materials, and is suitable for testing hysteretic behavior of a node test piece at scientific research and construction sites.

Description

Technical field [0001] The invention relates to a portable automatic control beam-column node bidirectional load joint performance test device and a measuring method, and belongs to the field of concrete buildings. Background technique [0002] In the field of civil engineering, it is very important to study the hysteretic performance of beam-column joints. In structures containing beam-column joints, joints are often weak links, and their hysteretic performance has a great influence on the seismic performance of the entire structure. Accurately measuring the hysteretic performance of joints is useful for evaluating the ductility, deformation capacity and capacity of beam-column joints. Energy consumption capacity is of great significance. [0003] At present, the research on the hysteretic performance of beam-column joints mainly adopts pseudo-static test. The column end uses jacks to apply axial pressure, and the beam end uses hydraulic jacks to apply low-cycle reciprocating ver...

AI Technical Summary

Problems solved by technology

The loading frequency and continuity of the reciprocating load applied by the hydraulic jack cannot be effectively controlled. On the other hand, the vertical force is applied by the jack. As the node moves sideways under the action of the vertical load, the jack may be damaged due to oil return. The applied vertical force cannot be kept constant, resulting in a large experimental error

Images