Health Monitoring of Stress-Laminated Timber Bridges Assisted by a Hygro-Thermal Model for Wood Material
| Autor: | Fortino, Stefania, Hradil, Petr, Koski, Keijo, Korkealaakso, Antti, Fülöp, Ludovic, Burkart, Hauke, Tirkkonen, Timo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
multi-phase models
Finite element method Monitoring finite element method stress-laminated timber decks Timber bridges lcsh:Technology lcsh:Chemistry timber bridges SDG 7 - Affordable and Clean Energy lcsh:QH301-705.5 lcsh:T Stress-laminated timber decks Humidity-temperature sensors Wood moisture content humidity-temperature sensors lcsh:QC1-999 wood moisture content monitoring lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Multi-phase models lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 11, Iss 98, p 98 (2021) Applied Sciences Volume 11 Issue 1 Fortino, S, Hradil, P, Koski, K, Korkealaakso, A, Fülöp, L, Burkart, H & Tirkkonen, T 2021, ' Health monitoring of stress-laminated timber bridges assisted by a hygro-thermal model for wood material ', Applied Sciences, vol. 11, no. 1, 98, pp. 1-21 . https://doi.org/10.3390/app11010098 |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app11010098 |
| Popis: | Timber bridges are economical, easy to construct, use renewable material and can have a long service life, especially in Nordic climates. Nevertheless, durability of timber bridges has been a concern of designers and structural engineers because most of their load-carrying members are exposed to the external climate. In combination with certain temperatures, the moisture content (MC) accumulated in wood for long periods may cause conditions suitable for timber biodegradation. In addition, moisture induced cracks and deformations are often found in timber decks. This study shows how the long term monitoring of stress-laminated timber decks can be assisted by a recent multi-phase finite element model predicting the distribution of MC, relative humidity (RH) and temperature (T) in wood. The hygro-thermal monitoring data are collected from an earlier study of the Sø rliveien Bridge in Norway and from a research on the new Tapiola Bridge in Finland. In both cases, the monitoring uses integrated humidity-temperature sensors which provide the RH and T in given locations of the deck. The numerical results show a good agreement with the measurements and allow analysing the MCs at the bottom of the decks that could be responsible of cracks and cupping deformations. |
| Databáze: | OpenAIRE |
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