Method for recognizing tension of arch bridge boom by considering a plurality of factors of environment

Abstract

The present invention discloses a method for recognizing the tension of an arch bridge boom by considering a plurality of factors of an environment. The method comprises the steps of: establishing anarc bridge boom tension calculation model, deducing an analysis expression of the tension and a lateral vibration frequency of a boom in a complex boundary condition, for facilitating engineering application, giving a boom tension practical expression through adoption of a boundary influence coefficient method, performing example verification, analyzing the calculation precision, application features and differences of each expression to provide reference for determination of the boom tension. Through consideration of the conditions such as flexural rigidity and the length of the boom, a vibration reduction pad, additional mass, elastic support, a sticky sheath and an environment temperature, the analysis expression of the tension and the vibration frequency of the boom is high in calculation precision and is suitable for tension vibration test calculation of booms with various lengths in a construction period and an operation period, the boom tension practical expression is high in calculation precision based on the boundary influence coefficient to meet the engineering precision demand, the mode is an explicit expression form, and the practicability is high.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a method for identifying the tension of an arch bridge suspender in consideration of multiple environmental factors. Background technique [0002] At present, the vibration frequency method is a common method for boom tension testing. It has the advantages of simplicity and strong practicability. It is suitable for all kinds of booms. Its test accuracy is closely related to the boundary conditions of the boom. Most scholars have conducted extensive research on the identification method of suspender tension and the boundary conditions of the suspender. In terms of identification methods, Park K.S. et al. calculated the suspender tension based on the back analysis and system identification method of the finite element model to improve the performance based on the string vibration theory. and the reliability of the linear regression method, Kim S.W., etc. u...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of consideration environment multi-factor influences arch bridge suspender tension identification method, to solve the prior art that proposes in the above-mentioned background technology. joint or hinged), without considering the influence of factors such as elastic support, rotational constraints, viscous sheath and additional mass under the complex boundary conditions of the suspender, it cannot fully reflect the actual situation of the suspender

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