Performance Evaluation of Bridges Under Scour by UAS Based Measurements

Year 2019, Volume: 22 Issue: 2, 385 - 391, 01.06.2019

Orkan Özcan

https://doi.org/10.2339/politeknik.450288

Cited By: 1

Abstract

Flood and stream induced scour
occurring in bridge piers located on rivers is one of the mostly observed
failure reasons in bridges. Scour induced failure risk in bridges and
determination of the alterations in bridge safety under seismic effects has the
ultimate importance. Thus, for the determination of bridge safety under the
scour effects, the scour amount under bridge piers should be designated
realistically and updated with continuous monitoring. In this study, in order
to measure the amount of scour in bridge piers unmanned aerial system (UAS)
based measurement methods were implemented. UAS based measurement systems
provide new and practical approach and bring high precision and reliable
solutions considering recent measurement systems. For this purpose, the
reinforced concrete (RC) bridge that is located on Antalya Boğaçayı River,
Turkey and that failed in 2003 due to flood-induced scour was selected as the
case study. The amount of scour occurred in bridge piers was determined
realistically, and the behavior of bridge under scour effects was investigated.
In the light of the attained scour measurements and expected scour after a
probable flood event, the behavior of scour induced RC bridge was determined by
pushover analyses under seismic loadings. In the analyses, the load and
displacement capacity of bridge was observed to diminish significantly under
expected scour. Regarding the case study, UAS based and continuously updated
bridge performance evaluation system was developed that could be used for
bridges located on the riverbed.

Keywords

UAS, scour, bridge, performance

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