Real-time method of influence of bridge structure on high-frequency sampling indexes through temperature removing in on-line safe monitoring

Abstract

The invention provides a real-time method of the influence of a bridge structure on high-frequency sampling indexes through temperature removing in on-line safe monitoring. The method is clear in principle and simple, the influence of a temperature effect can be efficiently removed in real-time measurement data of a bridge on-line monitoring system, and thus a real-time safety early warning and structural state evaluation need of the bridge on-line safety monitoring system is met. The method comprises the main steps of 1, determining a time interval T, wherein the value of T is determined according to the cycle corresponding to the vertical first vibration mode of a bridge structure bridge deck system; 2, every the interval T, according to the real-time measurement data of the high-frequency sampling indexes in the previous interval minus T-0, calculating the average value epsilon a of the monitored value; 3, subtracting epsilon a from a high-frequency sampling real-time measurement numerical value in the interval 0-T so that temperature modification of the real-time measurement data can be completed in real time; 4, when the interval T is finished, repeating steps 2-3, and so as on in a similar fashion. The real-time method is applicable to real-time temperature effect modification of high-frequency sampling indexes (like stress and dynamic deflection) in all bridge safety monitoring systems.

Description

technical field [0001] The invention belongs to the technical field of on-line safety monitoring data processing of bridge structures in civil engineering and traffic engineering, and particularly relates to a real-time method for eliminating the influence of temperature on high-frequency sampling indicators in on-line safety monitoring of bridge structures. Background technique [0002] As an important part of the modern transportation system, the safety and stability of bridges is the basis for ensuring smooth traffic. However, the service period of bridges is long, and the environment is harsh and complex. Usually, structural damage occurs due to factors such as improper maintenance, environmental erosion, and material aging, which degrades its safety. In recent years, with the rapid growth of my country's economy, bridges The rapid increase in the traffic flow and weight load carried by the bridge greatly increases the possibility of structural safety accidents on the bri...

AI Technical Summary

Problems solved by technology

[0005] In practice, some methods have been developed to separate the environmental temperature effect components from the strain response of bridge structures, such as least squares fitting method, ARMA time series model method, low-pass filtering method, empirical mode decomposition method, wavelet analysis method, etc. , but for engineering practice, the model and operation steps of the existing methods are too complicated, and the calculation process is relatively cumbersome, which cannot easily and effectively complete the real-time processing of monitoring data in the actual monitoring system

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