An axial compression ratio application and specimen fixing device and test method for the seismic performance test of structures
A technology of seismic performance and fixing device, which is used in the testing of machine/structural components, measuring devices, vibration testing, etc., which can solve the problem that the friction coefficient of the pulley has a large influence on the test, the jack and the force sensor are damaged, and the axial force produces a large eccentricity. and other problems, to achieve the effect of saving materials, reasonable structure, convenient loading and unloading
Active Publication Date: 2017-05-10
HOHAI UNIV
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Problems solved by technology
The cost of the block is high in this method, and the friction coefficient of the block in the test has a great influence on the test
Especially when the test piece is bent and deformed, the top surface of the test piece will produce a small corner, resulting in uneven force on the jack, which will easily lead to damage to the jack and the force sensor
[0007] Affected by the machining accuracy of the test piece and the levelness error of the ground and the upper beam, the application of axial force may produce a large eccentricity, which is difficult to adjust by conventional methods
Method used
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[0031] Attached below figure 1 The present invention is described further:
[0032] Such as figure 1 As shown in , an axial pressure ratio application and specimen fixing device for structural seismic performance tests, the device includes an axial pressure ratio application system, a ground anchor fixing system for specimens, and an axial pressure eccentric adjustment system;
[0033] The axial pressure ratio application system includes the first trough-shaped steel plate 1, the second trough-shaped steel plate 2, the pull screw 3, the positioning nut 4, the fixed nut 5, the bending steel backing plate 6, the steel plate with circular arc groove 7, and the force sensor 8. The jack 9 and the test piece 10; wherein, the lower part of the test piece 10 reserves a groove 12 for the passage of the second grooved steel plate 2, and the first grooved steel plate 1 and the second grooved steel plate 2 Both wings have a horizontal section, and screw holes are reserved on the horizon...
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The invention relates to a device for exerting an axis-compression ratio and fixing a test specimen for a structural seismic performance test and a testing method for the device, and belongs to the domain of structural test research. The device is composed of three parts, namely an axis-compression ratio exerting system, a test specimen earth anchor fixing system and an axial compression eccentric adjustment system, wherein the axis-compression ratio exerting system is composed of a first channel-section steel plate, a second channel-section steel plate, an opposite-pull screw rod, positioning nuts for channel-section steel plates, fixing nuts and an anti-bending steel base plate; and the test specimen earth anchor fixing system is composed of an anchor channel-section steel plate, an earth anchor rock bolt, an earth anchor nut and a steel base plate in the test specimen earth anchor fixing system. By virtue of the device and the method provided by the invention, the test specimen is convenient to dismantle and fix; hoisting equipment does not need to be arranged during equipment installation; the positioning accuracy is high; the load exerting position is small in error; and the device and the method are suitable for experiment performance research on members such as columns, walls, and frame, on which vertical and horizontal loads simultaneously act.
Description
technical field [0001] The invention relates to an axial compression ratio application and specimen fixing device and test method for structural seismic performance tests, which are mainly used for seismic performance tests of various concrete columns, walls and frames, and belong to a loading and fixing device for indoor model tests device. Background technique [0002] my country is an earthquake-prone country. Scholars and research institutions are doing more and more research on the seismic performance of structures. A large number of experimental studies are required, including research on the seismic performance of columns, walls, and frames. In the seismic performance test, low-cycle repeated load test and pseudo-dynamic test are often used, and these tests have vertical load and horizontal load at the same time. [0003] The specimens were fixed in the following ways in the experiment: [0004] (1) A hole is reserved in the middle of the lower fixed beam, and the g...
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IPC IPC(8): G01M7/02
Inventor 吴二军袁开军石少雄刘芳郭现收
Owner HOHAI UNIV