Method for measuring dynamic mean deflection of bridge through inclination angle sensors

Abstract

The invention discloses a method for measuring dynamic mean deflection of a bridge through inclination angle sensors. The method comprises the following steps: analyzing vibration frequency f1 of vertical deformation of a bridge, obtaining a vibration period T1 of the bridge according to a relation between the vibration frequency and the vibration period, namely T is equal to 1/f, measuring vertical deflection deformation of a bridge structure by using inclination angle sensors, arranging n inclination angle sensors on the bridge, connecting the n inclination angle sensors with a collection instrument, setting sampling frequency of each sensor as f0, sampling according to equal time intervals and enabling each sensor to collect data at the same moment, wherein the sampling frequency of each sensor is at least greater than two times of vibration frequency of vertical deformation of the bridge. According to the method, the inclination angle sensors are used for measuring the deflection deformation of the structure; the dynamic deflection deformation of the bridge does not need to be directly measured; static deflection capable of reflecting the bearing capacity of the structure is measured through an indirect manner; automatic and real-time monitoring can be achieved; the long-term monitoring and measurement cost of the bridge can be obviously reduced; and meanwhile, the measurement efficiency can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of bridge structure measurement, in particular to a method for measuring the dynamic mean value deflection of a bridge through an inclination sensor. Background technique [0002] Bridge deflection measurement is an important part of bridge inspection, an important index of bridge safety evaluation, and the most intuitive evaluation index. Measuring its change can largely inform the use status of the bridge. Because the deformation of the bridge should conform to the deformation considered in the initial design, if the actual deformation of the bridge does not conform to the theoretical deformation, such as excessive subsidence, excessive deflection, etc., it means that the structure is likely to be in an unhealthy use situation. The deflection of the bridge is closely related to the bearing capacity of the bridge and the ability to resist dynamic loads such as earthquakes. Therefore, the research of bridge...

AI Technical Summary

Problems solved by technology

Measurement of dynamic deformation of structures is a complex problem

In fact, there is no need to measure the dynamic instantaneous deflection of the bridge structure, which can neither reflect the actual bearing capacity of the bridge well, but also generate massive data and occupy a large amount of storage space

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