A wireless sensor layout method for wind-induced vibration monitoring of bridges

Abstract

The invention provides a wireless sensor placement method for wind-induced bridge vibration monitoring. The method comprises the following steps of: firstly simulating a wind field on the basis of a bridge finite element model and a standard wind spectrum, and carrying out calculation to obtain a wind-induced bridge vibration response by adoption of a wind-induced bridge vibration response time domain calculation method; calculating a contribution degree, for the wind-induced bridge vibration, of each selectable measurement point, drawing a contribution degree curve of each selectable measurement point, and arranging wireless sensors by taking peak points and valley points of the contribute degree curves as key measurement points; and further uniformly arranging relay measurement points as few as possible between the key measurement points and between the key measurement points and a data aggregation node of a data processing center, so as to realize the wireless sensor placement of wind-induced bridge vibration monitoring. The method has the advantages of being simple to operate and easy to realize, has the effect of improving the representativeness of sensor data acquisition and the reliability of transmission, and has a wide engineering application prospect.

Description

technical field [0001] The invention belongs to the fields of civil engineering and bridge monitoring, and in particular relates to a wireless sensor laying method for wind-induced vibration monitoring of bridges. Background technique [0002] A bridge is a key node of a modern transportation system, an inseparable and important component of a country's infrastructure, and an indispensable and important support for a country's economic development. In order to meet the regional economic development and transportation needs, a large number of kilometer-level cable-supported bridges have been built and put into use all over the country, such as Beipanjiang Bridge, Sutong Bridge, Runyang Bridge, Hangzhou Bay Bridge, Xihoumen Bridge, etc. . These bridges have the characteristics of large span, flexible structure, high tower and light weight, and the vibration response under wind load becomes one of the main factors affecting driving comfort and structural safety. Not only that...

AI Technical Summary

Problems solved by technology

However, the wind-induced vibration response of bridges is quite different from the vibration response under environmental excitation, and the measurement points selected based on the existing vibration sensor layout methods cannot accurately reflect the characteristics of the bridge wind-induced vibration response.

Secondly, the existing vibration sensor layout methods are all aimed at wired sensors, regardless of the distance between measuring points

For wireless sensors, due to the battery power supply, the data transmission distance of a single sensor is short, and the existing vibration sensor layout method cannot guarantee the connectivity of the wireless sensor network

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