A Judgment Method for Stress State of Large Diameter Steel Tie Rod

Abstract

The invention discloses a method for judging the internal force of a large-diameter steel tie rod. Through theoretical calculation and analysis considering the second-order effect, the theoretical curve relationship between the axial force of the steel tie rod and the mid-span deflection is obtained, and then the solid steel tie rod is pulled on a stretching device. Tensile test, compared with the theoretical curve, an accurate steel tie rod axial force and mid-span deflection curve function is obtained through deviation analysis. Through the actual measurement of the steel tie rod mid-span deflection value during the construction process, it is substituted into the steel tie rod and mid-span deflection curve function, Obtain the axial force on the steel tie rod, and accurately judge the actual stress state of the steel tie rod. The invention solves the problems of difficult detection of the stressed state and high detection cost after the construction of the large-diameter steel tie rod is completed, and has the advantages of high detection implementation efficiency, low cost and high precision.

Description

A Judgment Method for Stress State of Large Diameter Steel Tie Rod technical field The invention belongs to the field of steel structure buildings, and relates to a method for judging the stressed state of a large-diameter steel tie rod. Background technique The spanning distance of the roof is generally increasing, and today's super-long-span roofs have reached a spanning level of more than 200 meters. With the continuous breakthrough of the span, it will inevitably bring a series of new technical problems. What kind of material and what type of components should be used to bear and transmit the huge structural internal force caused by the long span, and how to ensure the actual bearing of this material or component? The force state meets the design requirements and so on. The large-diameter high-strength alloy steel tie rod is a new type of structural component, which can bear huge internal force to meet the demand of the lower chord of super-long-span structures. How...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a method for judging the stressed state of a large-diameter steel tie rod, so as to conveniently and economically solve the detection problem of the stressed state of the steel tie rod

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