Precisely identifying method for geometric stiffness of section of cable strut

Abstract

The invention discloses a precisely identifying method for geometric stiffness of a section of a cable strut. The precisely indentifying method is a method for precisely indentifying the geometric stiffness of the section of the cable strut by computing inertia moment of a circular section of a steel wire based on hierarchy and sequentially comprises the following steps of step 1, carrying out equilateral hexagon hierarchy on the section of the cable strut, namely dividing the section of the cable strut into n equilateral hexagons from interior to exterior, acquiring basic parameter information of the section of the cable strut, including the number of steel wires in the cable strut, the axial force born by the steel wires, the elasticity modulus of steel wire material and the section area of each steel wire; step 2, computing the section inertia moment I' of the section of the cable strut without bearing the axial force through a formula; step 3, computing the section inertia moment I of the section of the cable strut bearing the axial force through the formulas; and step 4, multiplying the section inertia moment I obtained by the step 3 by the elasticity modulus of the steel wire material to obtain the geometric stiffness of the section of the cable strut. Through the precisely identifying method disclosed by the invention, the result has high precision and small error.

Description

technical field [0001] The invention belongs to the field of section stiffness identification methods, and in particular relates to a fine identification method for the geometric stiffness of irregular and unclosed cable-strut sections. The method is directly used in the stiffness calculation of various cable-strut sections, and is a fine measurement of the internal force of the cable-strut structure. Provide the basis. Background technique [0002] In recent years, my country's engineering construction has ushered in a period of rapid development. Because the cable rod has the advantages of simple structure, beautiful appearance and economy, the cable rod is widely used in engineering construction, especially in bridge construction, such as cable-stayed bridge cable, arch bridge suspender, arch bridge tie rod, suspension bridge main Lan etc. are rope rods. The cable force of the cable rod is related to the safety of the structure. In the application of the cable rod, the ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art and provide a fine identification method suitable for the geometric stiffness of irregular and unclosed cable-strut sections, which solves the problem that the current cable-strut section is an irregular and not closed surface. However, there is no fixed method for finely identifying the technical problem of the geometric stiffness of the cable-strut section, which provides a data basis for the fine calculation of the internal force of the cable-strut structure

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