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Measuring method for tension-rod pull force of large building

A technology of pull rod tension and measurement method, applied in force/torque/work measuring instrument, measuring device, measurement of elastic deformation force through measurement gauge, etc., can solve problems such as high measurement cost, large measurement error, and complicated measurement procedure , to achieve the effect of accurate measurement results, accurate measurement and low cost

Inactive Publication Date: 2011-10-05
CHONGQING JIAOTONG UNIVERSITY
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Problems solved by technology

[0006] In summary, the above-mentioned existing measurement methods all have defects such as complex measurement procedures, high measurement costs, and large measurement errors; therefore, how to design a simple, convenient, low-cost, and accurate measurement method for tension rod force has become a Technical problems to be solved in this field

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  • Measuring method for tension-rod pull force of large building
  • Measuring method for tension-rod pull force of large building

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] The method is particularly suitable for measuring the tensile force on the pull rods of large buildings such as suspension bridges and cable-stayed bridges. When measuring, such as figure 1 As shown, 1 is the rod to be tested, 2 is the reference rod, the reference rod 2 is made of the same material as the rod 1 to be tested, and can be made into a slender shape, and the reference rod 2 can not only be used as a reference standard for measurement, but also because of the same material , then in the same environment, the linear expansion caused by the influence of the environment is the same. If the two rods are not subjected to other external forces, the changes will be the same. Therefore, the influence of the material on the measurement due to changes in the environment and temperature can cancel each other out. Ensure accura...

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Abstract

The invention discloses a measuring method for tension-rod pull force of a large building, which is characterized in that: a reference tension-rod made of the same material is designed, the reference tension-rod and the to-be-measured tension-rod are arranged to be parallel, meanwhile, one end of the reference tension-rod is fixedly connected with the to-be-measured tension-rod, the to-be-measured tension-rod at front of the other end of the reference tension-rod is provided with a bracket, a telescopic gap is arranged between the bracket and the end surface of the reference tension-rod; the size of the clearance of the telescopic gap is measured before the to-be-measured tension-rod is used, is measured after the to-be-measured tension-rod bears force, the difference between the two measurement values is calculated, lastly, the size of the borne tension force after the to-be-measured tension-rod is used is calculated according to hooke law. Compared with the vibration frequency method, the magnetoelasticity method and the strain method in the prior art, the invention has advantages of simplicity, convenience, low cost, and precision measurement and the like.

Description

technical field [0001] The invention relates to a method for measuring the magnitude of the tensile force on the pull rods of large buildings such as suspension bridges and cable-stayed bridges. Background technique [0002] At present, large buildings such as suspension bridges and cable-stayed bridges are often supported by tie rods. The measurement of the tension on these tie rods plays a very important role in evaluating the safety of these structures. In the prior art, the methods for measuring the pulling force of these tie rods mainly include: [0003] Vibration frequency method: use the vibration frequency of the cable to estimate the tensile force on it. However, its error is large, it is seriously affected by environmental factors, its calibration is more complicated, and it is often impossible to measure because it cannot vibrate itself. [0004] Magneto-elastic method: Use the magneto-elastic effect to measure tension, but it often needs to be pre-installed dur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00G01L1/04G01B11/02
Inventor 曹建秋蓝章礼周建庭
Owner CHONGQING JIAOTONG UNIVERSITY
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