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Development of Displacement Estimation Technique for Bridges Located under Poor Measurement Circumstances

계측이 어려운 환경에 가설된 교량의 변위 추정 기술 개발

  • Received : 2016.10.17
  • Accepted : 2016.11.08
  • Published : 2016.12.31

Abstract

In this paper, to verify the field application of a displacement estimation technique based on the relationship between displacement and strain, static and dynamic field load test are performed on three-span continuous real bridge structures. The superstructure types of the test bridges are IPC girder highway bridge and steel box girder AGT bridge. LVDTs and strain gauges are attached to them; then, the responses due to test vehicle are measured. To obtain the displacement-strain relationship of the test bridges, the bridges are modeled as grillage system with 6 DOFs for the purpose of structural analyses. Static and dynamic displacements, which are estimated using both the calculated displacement-strain relationship and the measured strain signal, agree well with the values measured by LVDT. This study demonstrates that the displacement estimation technique using the strain signal can be effectively applied to the displacement measurement of bridge structures that cross rivers/roads/railways or have high clearance.

Acknowledgement

Supported by : 국토교통부

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