Long term application of vehicle-based health monitoring system to short and medium span bridges and improvement of damage detection sensitivity
Memoirs of the faculty of engineering, Yamaguchi university Volume 67 Issue 2
Page 41-73
published_at 2017-03
Title
バスモニタリングシステムによる中小スパン橋の長期モニタリングと損傷検知感度の向上
Long term application of vehicle-based health monitoring system to short and medium span bridges and improvement of damage detection sensitivity
Abstract
Largest portion of the bridge stock in almost any country and bridge owning organisation consists on ordinary bridges that has short or medium spans and are now deteriorating due to aging, etc. Therefore, it is becoming an important social concern to develop and put to practical use simple and efficient health monitoring systems for existing short and medium span (10-30m) bridges. In this paper, one practical solution to the problem for condition assessment of short and medium span bridges was discussed. A vehicle-based measurements with a public bus as part of a public transit system (called "Bus
monitoring system") has been developed to capable of detecting damage that may affect the structural safety of a bridge from long term vibration measurement data collected while the vehicle (bus) crossed the target bridges. This paper systematically describes how the system has been developed. The bus monitoring system aims to detect the transition from the damage acceleration period, in which the structural safety of an aged bridge declines sharply, to the deterioration period by continually monitoring the bridge of interest. To evaluate the practicality of the newly developed bus monitoring system, it has been fieldtested over a period of about four years by using an in-service fixed-route bus operating on a bus route in the city of Ube, Yamaguchi Prefecture, Japan. The verification results thus obtained are also descrived in this paper. This study also evaluates the sensitivity of “characteristic deflection”, which is a bridge (health) condition indicator used by the bus monitoring system, in damage detection. Sensitivity of “characteristic deflection” is verified by introducing artificial damage into a bridge that has ended its service life and is awaiting removal.
monitoring system") has been developed to capable of detecting damage that may affect the structural safety of a bridge from long term vibration measurement data collected while the vehicle (bus) crossed the target bridges. This paper systematically describes how the system has been developed. The bus monitoring system aims to detect the transition from the damage acceleration period, in which the structural safety of an aged bridge declines sharply, to the deterioration period by continually monitoring the bridge of interest. To evaluate the practicality of the newly developed bus monitoring system, it has been fieldtested over a period of about four years by using an in-service fixed-route bus operating on a bus route in the city of Ube, Yamaguchi Prefecture, Japan. The verification results thus obtained are also descrived in this paper. This study also evaluates the sensitivity of “characteristic deflection”, which is a bridge (health) condition indicator used by the bus monitoring system, in damage detection. Sensitivity of “characteristic deflection” is verified by introducing artificial damage into a bridge that has ended its service life and is awaiting removal.
Creators
矢部 明人
Creators
Jari Puttonen
Source Identifiers
[PISSN] 1345-5583
[NCID] AN00244228
Creator Keywords
short & medium span bridge
long term monitoring
public bus
health monitoring system
condition assessment
damage detection
characteristic deflection
sensitivity
Languages
jpn
Resource Type
departmental bulletin paper
Publishers
山口大学工学部
Date Issued
2017-03
File Version
Version of Record
Access Rights
open access
Relations
[isPartOf]
[URI]http://memoirs.lib-e.yamaguchi-u.ac.jp/