Construction film structure pre-tension measurement method and apparatus thereof

A technology of measuring device and measuring method, applied in the directions of tension measurement, measuring device, measuring force, etc., can solve the problems of inconvenient carrying of the device, complicated measuring process, difficult to meet boundary conditions, etc., and achieve simple structure, high measuring accuracy, cost low effect

Inactive Publication Date: 2010-01-06
CHONGQING ZHONGKE CONSTR GROUP
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Problems solved by technology

However, in the actual measurement of this method, its boundary conditions are difficult to meet, and the measurement process is relatively complicated, and the measurement device is not convenient to carry

Method used

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  • Construction film structure pre-tension measurement method and apparatus thereof
  • Construction film structure pre-tension measurement method and apparatus thereof
  • Construction film structure pre-tension measurement method and apparatus thereof

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Embodiment Construction

[0061] see Figure 4 , a method for measuring the pretension of a building membrane structure, the present invention is a catapult method, comprising the steps of:

[0062] A) A particle ball is incident on a stretched membrane surface with a fixed boundary (a*b), causing the membrane surface to vibrate, and the ball is bounced back at the same time;

[0063] B) Measure the incident velocity v of the ball in the tensioned membrane plane with the same fixed boundary 0 , returns the velocity v t , the maximum amplitude T at the midpoint of the membrane surface max , and the mass m of the ball 0 ;Exchange the direction of latitude and longitude and repeat the measurement to get T max , v 0 , v t ;

[0064] C) According to the formula:

[0065] π 2 habT max 2 [ ( σ 0 ...

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Abstract

The invention provides a building membrane structure pretension force measuring method and a measuring device thereof. The method comprises the steps of launching a particle bead to a tensioned membrane with a fixed boundary to vibrate the membrane which rebounds the bead; measuring the incident speed v0, the return speed vt, the membrane middle point maximum displacement (amplitude) Tmax and the bead mass m0 of the bead in the tensioned membrane with the same fixed boundary; changing the latitude and longitudinal directions, measuring Tmax, v0 and vt; according to the formula: pi<2>habTmax<2>[((sigma0x / a<2>)+(sigma0y / b<2>))+(pi<2> / 32)((Ex / a<4>)+(Ey / b4))Tmax<2>]=4m0(v0<2>-vt<2>), measuring two groups of Tmax, v0 and vt, to calculate the membrane tension force sigma0x and sigmax0y. The method is based on the membrane large deflection theory, to approach actuality theoretically and obtain high theory accuracy, having wide application for different membranes. The method can measure two orthogonal pretension forces of membranes and the tension force of a membrane under different loads. The invention can be quickly applied in actual projects. The measuring device has simple structure, low cost and simple application.

Description

technical field [0001] The invention belongs to the technical field of engineering measurement and monitoring, and in particular relates to a method for measuring the pretension of an architectural membrane structure and a measuring device for realizing the method. Background technique [0002] The rigidity of the architectural membrane structure is achieved by applying pre-tension to the membrane. The greater the pretension of the membrane material, the greater the stiffness of the membrane structure, and the stronger its ability to withstand external loads. However, the greater the pretension of the membrane, the higher the requirements for the construction tension equipment and the anchoring conditions of the boundary members, and the lower the strength reserve. However, if the pretension of the membrane material is too small, its out-of-plane rigidity will be too small. Under the action of out-of-plane loads such as wind, rain and snow, the deformation will be large, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/00G01L5/04
Inventor 郑周练刘长江何晓婷陈山林孙俊贻颜禧仕
Owner CHONGQING ZHONGKE CONSTR GROUP
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