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A benchmarked framework for geometric digital twinning of slab and beam-and-slab bridges

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journal contribution
posted on 25.03.2020 by Ruodan Lu, Ioannis Brilakis
This paper describes the design, implementation and benchmarking of a framework to automate the process of geometric digital twinning for existing slab and beam-and-slab bridges. Called Lukis, the framework followed a top-down strategy to detect and twin bridge concrete elements in point clouds into an established data format. Existing software packages require modellers to spend many hours generating shapes to fit point-cloud sub-parts. Previous methods can generate surface primitives combined with rule-based classification to produce cuboid and cylinder models. While these methods work well in synthetic datasets or simplified cases, they encounter challenges when dealing with real-world point clouds. This challenge was tackled by investigating the entire workflow of geometric digital twinning for bridges and proposing a new framework to auto-generate bridge objects without needing to generate low-level surface primitives. The framework was implemented on a single software platform. Experiments demonstrated its ability rapidly to twin geometric bridge concrete elements. Compared to manual operation, the framework reduced the overall twinning time by at least 95% while the twinning quality (spatial accuracy) was improved. Lukis is the first framework of its kind to have achieved geometric digital twinning for primary concrete elements of bridges on one platform. It has laid foundations for researchers to generate semantically enriched digital twins.

Funding

This research work is supported by EPSRC, Infravation Seebridge project under grant no. 31109806.0007, and Cambridge Trimble Fund.

History

School

  • Architecture, Building and Civil Engineering

Published in

Proceedings of the Institution of Civil Engineers - Smart Infrastructure and Construction

Publisher

ICE Publishing

Version

AM (Accepted Manuscript)

Rights holder

© ICE Publishing

Publisher statement

This paper was accepted for publication in the journal Proceedings of the Institution of Civil Engineers - Smart Infrastructure and Construction and the definitive published version is available at https://doi.org/10.1680/jsmic.19.00012.

Acceptance date

25/03/2020

Publication date

2020-04-17

Copyright date

2020

eISSN

2397-8759

Language

en

Depositor

Dr Ruodan Lu. Deposit date: 25 March 2020

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