Lever principle based concentrated load loading device in steel beam stability test
A stability test and concentrated load technology, which is applied in the field of steel structures, can solve the problems of discontinuous force on steel beams, constraining the lateral displacement of steel beams, and many heavy objects, and achieve the effects of reducing contact area, repeated use costs, and simple principles
Active Publication Date: 2018-04-17
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0005] There are the following disadvantages in using jacks to centrally load steel beams at mid-span: (1) When jacks apply concentrated loads, they will constrain the lateral displacement of steel beams, making the steel beams less prone to overall instability
(2) The jack applies a concentrated load, usually a surface load, which is far from the ideal point load state, which will constrain the torsion of the steel beam
[0006] There are the following disadvantages when using heavy objects for hanging and loading: (1) For steel beams with large bearing capacity, more heavy objects are required for heavy objects to be loaded, and it is difficult to solve the problem of hanging
(2) When heavy objects are loaded, the force on the steel beam is discontinuous, and it is difficult to determine the ultimate ultimate load
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[0040] The present invention will be further described in detail below with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0041] Such as Figure 1 to Figure 10 As shown, a concentrated load loading device for steel beam stability bearing capacity test, including loading beam 1, line contact support, steel strand, reaction frame, jack 8, force sensor 7, turnbuckle 4 and beam end clamp support seat.
[0042] Such as Figure 3 to Figure 5 As shown, the length direction of the loading beam 1 is perpendicular to the length direction of the test beam, and the turnbuckle 4 is adjusted to make it level. Compared with the test beam 11, it has greater rigidity. There are two lug plates 5, and the two lug plates 5 are connected by a pin 12, and the upper and lower flanges at the left and right ends are provided with wire passing grooves. The width of the wire passing groove should be slightly larger than the diameter of the ste...
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The invention discloses a lever principle based concentrated load loading device in steel beam stability test. The device comprises a loading beam, a wire contact bearer, steel strands, a reaction frame, a jack, a force sensor, a turnbuckle and beam-end clamping bearers. One end of one steel strand is connected to the loading beam, and the other end of the steel strand is anchored to the ground via the turnbuckle; one of the other steel strand is connected to the other end of the loading beam, and the other end of the same is connected to the reaction frame and the jack; and the jack transmitsa load to a test beam via the loading beam and the wire contact bearer. According to the invention, the phenomenon that a traditional jack loading device limits lateral displacement of the steel beamis changed, the applied load can be kept vertically downward via the bearer, and torsion and deformation of the steel beam are overcome.
Description
Technical field [0001] The invention relates to the field of steel structures, in particular to a loading device based on the principle of leverage for applying a concentrated load in the middle of the steel beam to measure the stable bearing capacity of the steel beam. Background technique [0002] As a commonly used material for buildings, steel has many outstanding advantages such as high strength, light weight, good seismic performance and high reliability. At the same time, it can effectively reduce the weight of the structure, reduce the engineering cost, reduce the energy consumption and be conducive to environmental protection. It has been widely used in practice. [0003] Steel beams are the main load-bearing components in steel structures, and the stability of steel beams is the focus of attention of researchers. Therefore, it is necessary to conduct experimental research on the overall stability of steel beams. [0004] Regarding the research on the overall stability of ...
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IPC IPC(8): G01M5/00
Inventor 孟柳辰康澜
Owner SOUTH CHINA UNIV OF TECH