Axial compression column displacement measuring device and method based on spring support
A spring support, displacement measurement technology, applied in the field of displacement frame, can solve problems such as easy generation of reverse restraint force, and achieve the effect of improving precision and accuracy
Pending Publication Date: 2021-12-21
BEIJING UNIV OF TECH
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Problems solved by technology
[0006] For the tension and compression tests of the column, in order to solve the problem that the vertical displacement of the column installed by the displacement meter installed on the traditional device is easy to generate a reverse constraint force and requires an additional displacement frame to install the displacement gauge, the present invention provides a method for eliminating the reverse constraint force and Displacement frame device capable of installing horizontal displacement gauge
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[0037] Below in conjunction with accompanying drawing, the embodiment of this patent is described in detail.
[0038] First, assemble the displacement frame, first install the L-shaped screw rod into the upper beam frame by screwing in the nut, and then fix one end of the long screw rod on the upper beam frame through the bolt hole, with the direction facing outward. Insert the fixed plate into the long screw rod through the bolt hole, and install the two short screw rods on the upper beam frame through the smooth hole in the middle hole. Load onto the positioning plate, spring, positioning plate and nut on the long screw rod in the following order.
[0039] Assemble the lower beam assembly in the same way, align the upper and lower bolt holes of the vertical fixing column with the bolt holes at the left end of the upper beam frame and the bolt holes at the left end of the lower beam frame respectively, assemble and fix the upper and lower beam assemblies to form a displacemen...
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The invention discloses an axial compression column displacement measuring device and method based on a spring support. The axial compression column displacement measuring device comprises an upper cross beam assembly body, a lower cross beam assembly body, a vertical fixing column and a spring baffle. All the components of the system are formed through factory machining, the precision and quality are easier to control, and field experiment installation is rapid and convenient. The problem that a frame-shaped displacement frame is fixed to the periphery of a column to generate large constraining force on the column is solved. According to the principle, a short screw is clamped on the column, when the column is compressed and expands, the short screw transmits the force to the spring, the spring is compressed to enable the short screw to move outwards along with expansion of the column, it is guaranteed that no large reverse constraining force is applied to the column, and the test precision and accuracy are improved. In addition, a displacement meter is installed in the horizontal direction to abut against the test piece, and the horizontal displacement of the column can be measured.
Description
technical field [0001] The invention relates to a displacement frame for installing a displacement meter, in particular to solving the problem that the displacement frame used for a column has binding force. Background technique [0002] In experiments such as column tension and compression, the vertical strain of the column is a very important data in the experiment. There are two commonly used methods for measuring strain: sticking strain gauges and adding displacement gauges. Compared with the strain gauge, the vertical displacement of the column with the displacement meter has a larger range, and its accuracy is also higher than that of the strain gauge. Therefore, displacement measurement displacement has become an irreplaceable method. However, the traditional external displacement meter measurement method will cause deformation of the displacement meter bracket due to the axial expansion of the specimen during the actual measurement process, resulting in large error...
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IPC IPC(8): G01B21/02
CPCG01B21/02Y02E30/30
Inventor 白玉磊白尚聪贾俊峰秦思颖
Owner BEIJING UNIV OF TECH