Method for tensioning boom and measuring tension, and device for method

Abstract

The invention discloses a method and a device for accurately measuring a bridge boom and tensioning the boom. The device consists of an anchor backing plate with a central hole, a sleeve with an adjustment window, fixing nuts, a through lifting jack, a through force sensor, a dynamometer, a limit nut, and a tension rod; and the method comprises the following steps of: determining the through force sensor according to a Hooke's law and the maximum design tension of the boom, calculating the maximum stress of the tension rod, selecting the materials of a tension rod body according to the maximum stress, determining the lectotype of the through force sensor, sequentially assembling, and tensioning the boom by using the through lifting jack, reading the dynamometer, and displaying the force value of the through force sensor. The device has a simple structure, is high in accuracy and low in cost, and is detachable, and can be used repeatedly.

Description

technical field [0001] The invention belongs to the technical field of bridges, and relates to a measurement of bridges, more specifically, to a suspension rod stretching and tension measurement method and a device thereof. Background technique [0002] The tied arch bridge is a high-order super statically indeterminate structure. It combines the arch and the beam through the suspender to give full play to the structural performance and combined effect of the beam under bending and the arch under compression, and the horizontal thrust of the arch end is borne by the tie rod, so that Arch end bearings do not generate horizontal thrust. Therefore, the tension of the suspender is the core factor affecting the stress of the arch bridge structure, directly affects the rationality of the bridge stress, and thus affects the safety, service life and line shape of the bridge deck. Therefore, the tension control of suspenders is very important for tied arch bridges, and the tension o...

AI Technical Summary

Problems solved by technology

The frequency method is to use the relationship between the tension of the tensioned boom and the natural frequency, and measure the natural frequency of the boom by the vibration testing equipment to calculate the corresponding tension. All the instruments in this method can be reused, so the frequency The method is currently the most economical and practical method, but the measurement accuracy of this method largely depends on the boundary constraints of the boom, the calculated length, bending stiffness, linear density and other parameters, in the ideal case of the above parameters can be To obtain better test accuracy, but in actual engineering, the constraints of the boom are very vague, and the calculation length and bending stiffness cannot be determined, and the above parameters will become more complicated after the damper is installed, which will lead to The tension calculated by the frequency method produces a large error, even wrong

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