Investigating snipe depth in girders and corbels in timber bridges
Paper
Cohen, Jethro, Lokuge, Weena and Herath, Nilupa. 2018. "Investigating snipe depth in girders and corbels in timber bridges." 9th International Conference on Bridge Maintenance, Safety and Management (IABMAS 2018). Melbourne, Australia 09 - 13 Jul 2018 United Kingdom.
| Paper/Presentation Title | Investigating snipe depth in girders and corbels in timber bridges |
|---|---|
| Presentation Type | Paper |
| Authors | Cohen, Jethro (Author), Lokuge, Weena (Author) and Herath, Nilupa (Author) |
| Journal or Proceedings Title | Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges - Proceedings of the 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018 |
| Number of Pages | 5 |
| Year | 2018 |
| Place of Publication | United Kingdom |
| ISBN | 9781138730458 |
| Web Address (URL) of Paper | http://iabmas2018.org/ |
| Conference/Event | 9th International Conference on Bridge Maintenance, Safety and Management (IABMAS 2018) |
| Event Details | 9th International Conference on Bridge Maintenance, Safety and Management (IABMAS 2018) Event Date 09 to end of 13 Jul 2018 Event Location Melbourne, Australia |
| Abstract | There are over 300 timber bridges on Queensland state controlled roads which require constant maintenance as the timber components deteriorate over time. Inspections are done at three levels depending on the necessity. A significant number of the defects are due to poor practices such as excessive sniping of girders and corbels, which contribute to many bridges being rated in poor condition. This causes costs to increase due to increased inspection frequencies and rectification works. The aim of this research is to critically investigate the effect of sniping on the overall structural performance of individual bridge elements. Based on inspection reports for timber bridges, it is understood that sniping is a major issue and it contributes towards the deterioration of the whole member. Structural analysis has been carried out using finite element modelling in Ansys. Finite element modelling allows idealised timber components to be analysed under different loading conditions. This has been used to compare the effect of snipe depth on the structural integrity of timber components such as girders and corbels. As snipe depth increases, stress concentrations form at the snipe resulting in increased risk of splitting. Based on this modelling, some recommendations are made regarding the future assessment of component condition states. |
| Keywords | bridge deterioration, snipe, girder, corbel |
| ANZSRC Field of Research 2020 | 400508. Infrastructure engineering and asset management |
| Byline Affiliations | School of Civil Engineering and Surveying |
| University of Melbourne | |
| Institution of Origin | University of Southern Queensland |
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