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Resistance measurements to find high moisture content inclusions adapted for large timber bridge cross-sections
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknik.ORCID-id: 0000-0002-7076-9494
SP - Science Partner.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknik.ORCID-id: 0000-0001-8404-7356
2017 (engelsk)Inngår i: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 12, nr 2, s. 3570-3582Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

One challenge of monitoring and inspecting timber bridges is the difficulty of measuring the moisture content anywhere other than close to the surface. Damage or design mistakes leading to water penetration might not be detected in time, leading to costly repairs. By placing electrodes between the glulam beams, the moisture content through the bridge deck can be measured. Due to the logarithmic decrease of the resistance in wood as a function of electrode length, the model must be calibrated for measurement depth. Two models were created: one for electrode lengths of 50 mm and one for electrode lengths up to 1355 mm. The model for short electrodes differed by no more than 1 percentage points compared with the oven dry specimens. The model for long electrodes differed up to 2 percentage points for lengths up to 905 mm, and over that it could differ up to 4 percentage points.

sted, utgiver, år, opplag, sider
North Carolina State University , 2017. Vol. 12, nr 2, s. 3570-3582
HSV kategori
Forskningsprogram
Träteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-63537DOI: 10.15376/biores.12.2.3570-3582ISI: 000402883700098Scopus ID: 2-s2.0-85018882673OAI: oai:DiVA.org:ltu-63537DiVA, id: diva2:1098759
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Validerad;2017;Nivå 2;2017-05-30 (andbra)

Tilgjengelig fra: 2017-05-26 Laget: 2017-05-26 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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Björngrim, NiclasHagman, Olle

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