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Fjellgaard Mikalsen, RagniORCID iD iconorcid.org/0000-0003-0979-2369
Publications (10 of 73) Show all publications
Fjellgaard Mikalsen, R., Fjærestad, J. S., Fredagsvik, N., Nergård, A. & Steen-Hansen, A. (2024). Assessing the Impact of Bjørnis the Fire Bear: A Study on Fire Safety in Norwegian Households. Paper presented at 4th European Symposium on Fire Safety Science 09/10/2024 - 11/10/2024 Barcelona, Spain. Journal of Physics, Conference Series, 2885(1), Article ID 012095.
Open this publication in new window or tab >>Assessing the Impact of Bjørnis the Fire Bear: A Study on Fire Safety in Norwegian Households
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2024 (English)In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 2885, no 1, article id 012095Article in journal (Refereed) Published
Abstract [en]

The present research explores the influence of Bjørnis the Fire Bear on residential fire safety in Norway. Our survey, comprising 1275 participants, reveals that Bjørnis spurred the adoption of 5181 fire safety measures among the respondents, averaging 4.1 measures per household. The data suggests a positive association between exposure to Bjørnis and an increased number of safety measures implemented. These results highlight Bjørnis' efficiency in fostering awareness about fire safety, potentially serving as a model for introducing or sustaining similar mascots and initiatives on a global scale

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2024
National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-76254 (URN)10.1088/1742-6596/2885/1/012095 (DOI)
Conference
4th European Symposium on Fire Safety Science 09/10/2024 - 11/10/2024 Barcelona, Spain
Available from: 2024-12-03 Created: 2024-12-03 Last updated: 2024-12-03Bibliographically approved
Aamodt, E., Jiang, L., Fjellgaard Mikalsen, R., Snersrud, D. O., Vermina Plathner, F., Sjöström, J., . . . Skilbred, E. S. (2024). Development of large lab-scale fire dynamics experiments relevant for Scandinavian wildfire behaviour. Paper presented at 4th European Symposium on Fire Safety Science 09/10/2024 - 11/10/2024 Barcelona, Spain. Journal of Physics, Conference Series, 2885(1), Article ID 012069.
Open this publication in new window or tab >>Development of large lab-scale fire dynamics experiments relevant for Scandinavian wildfire behaviour
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2024 (English)In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 2885, no 1, article id 012069Article in journal (Refereed) Published
Abstract [en]

The Scandinavian countries have in later years seen several severe wildfires and is expected to exhibit more severe fire danger. While direct flame spread has been an important topic in wildfire research, there is a need for development and to ensure that experimental methods are relevant for Scandinavian wildfire characteristics. To ensure relevant lab conditions for fire-resilient material development work, large lab-scale (2×4 meters) experiments were conducted on various fuels. Its fire behaviour (such as rate of spread, fireline intensity and flame length) was compared with ongoing wildfire field studies from ongoing field studies in boreal and hemiboreal Sweden. The lab fire experiments show good potential to mimic relevant natural wildfire conditions in the laboratory once a standard design fire exposure for fire resilient materials is developed.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2024
National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-76255 (URN)10.1088/1742-6596/2885/1/012069 (DOI)
Conference
4th European Symposium on Fire Safety Science 09/10/2024 - 11/10/2024 Barcelona, Spain
Available from: 2024-12-03 Created: 2024-12-03 Last updated: 2024-12-03Bibliographically approved
Fjellgaard Mikalsen, R., Fjærestad, J. S., Fredagsvik, N., Nergård, A. & Lie, A. (2024). Effekten av Bjørnis - Studie av effekten av Bjørnis på brannsikkerheten i norske husstander.
Open this publication in new window or tab >>Effekten av Bjørnis - Studie av effekten av Bjørnis på brannsikkerheten i norske husstander
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2024 (Norwegian)Other (Other academic)
Abstract [no]

I denne FRIC studien er den forebyggende effekten av Bjørnis for brannsikkerheten i norske husstander studert. Hovedkonklusjonen er at Bjørnis har ført til en tydelig og dokumenterbar forbedring av brannsikkerheten i norske hjem. Studien er utført som en del av prosjekt 4.3 Brannsikkerhetstiltak for boliger i FRIC, i samarbeid med Stiftelsen Brannbamsen Bjørnis. Det er også et webinar på norsk og engelsk som presenterer studien, opptak av webinaret vil bli publisert her: https://fric.no/publikasjoner.

| In this FRIC study, the effect of the fire mascot Bjørnis on the fire safety in Norwegian households is studied. The main conclusion is that Bjørnis has led to a clear and documentable improvement of the fire safety in Norwegian homes. This study is a part of project 4.3 Fire safety measures for dwellings in FRIC, in collaboration with the Bjørnis Foundation. There is also a webinar in Norwegian and English presenting the study, the webinar recording will be published at: https://fric.no/en/publications.

Series
FRIC studie D4.3-2024.01
National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-70102 (URN)
Available from: 2024-01-18 Created: 2024-01-18 Last updated: 2024-01-19Bibliographically approved
Stølen, R., Fjærestad, J. S., Fjellgaard Mikalsen, R. & Jomaas, G. (2024). Experimental study of fire propagation on sloped roof with building applied photovoltaics. Paper presented at 4th European Symposium on Fire Safety Science 09/10/2024 - 11/10/2024 Barcelona, Spain. Journal of Physics, Conference Series, 2885(1), Article ID 012047.
Open this publication in new window or tab >>Experimental study of fire propagation on sloped roof with building applied photovoltaics
2024 (English)In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 2885, no 1, article id 012047Article in journal (Refereed) Published
Abstract [sv]

Photovoltaic modules have been shown to influence how a fire propagates across a flat roof, but the circumstances for which building attached photovoltaic (BAPV) modules promote fire propagation on a sloped roof is not studied in detail. Therefore, a series of small-medium- and large-scale experiments on a sloped roof with a BROOF(t2)-rated bituminous roof membrane on a wood chipboard substrate has been performed. Steel plates mimicking non-combustible photovoltaic (PV) modules were placed at different distances above the roof. Different sized wood cribs placed in the gap between the roof and the PV module were used as the ignition source. Similarly to findings for flat roofs, the experiments showed that the gap distance and the size of the ignition source are key factors for how far the fire propagates from the starting point. This supports that BAPV installations affect the fire dynamics on roofs. As such, the complete system of roof composition and PV installation needs to be considered as a whole to ensure adequate fire safety levels.

National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-76253 (URN)10.1088/1742-6596/2885/1/012047 (DOI)
Conference
4th European Symposium on Fire Safety Science 09/10/2024 - 11/10/2024 Barcelona, Spain
Available from: 2024-12-03 Created: 2024-12-03 Last updated: 2024-12-03Bibliographically approved
Fjellgaard Mikalsen, R., Kjølsen Jernæs, N. & Moltubakk Kempton, H. M. (2024). Fire-protective textiles for cultural historic objects: Part 3 of the BraTeK project.
Open this publication in new window or tab >>Fire-protective textiles for cultural historic objects: Part 3 of the BraTeK project
2024 (English)Report (Other academic)
Abstract [en]

This report describes the experimental study in the BraTeK (Brannbeskyttende tekstiler for kulturhistoriske objekter) project part 3. A method for small-scale exposure of radiative heating followed by water exposure has been developed to imitate the scenario of a church fire with water extinguishing. Six textiles have been evaluated by their heat and water properties for fireprotection of cultural historic objects. The overall conclusion for each textile shows that two were ranked as good, three as intermediate and one as poor. The similarity of the two materials ranked as “good” is an aluminium layer on the exposed side. Combined with the results from BraTeK part 1 and 2 (NIKU reports), the conclusions from this report may support the owners’ choice of fire-protective textiles.

Abstract [no]

Denne rapporten beskriver den eksperimentelle studien i BraTeK (Brannbeskyttende tekstiler for kulturhistoriske objekter) prosjekets del 3. Det er utviklet en metode for småskala eksponering av strålevarme etterfulgt av vanneksponering for å imitere scenarioet med en kirkebrann som inkluderer slokking med vann. Seks tekstiler er evaluert med hensyn på deres varme- og vannbeskyttende egenskaper for beskyttelse av kulturhistoriske gjenstander. Den samlede konklusjonen for hvert tekstil viser at to ble rangert som gode, tre som middels og én som dårlig. Begge tekstilene som er rangert som gode har et aluminiumslag på eksponert side. Kombinert med resultatene fra BraTeK del 1 og 2 (NIKU-rapporter), kan konklusjonene fra denne rapporten støtte eiernes valg av brannverntekstiler.

Publisher
p. 39
Series
RISE Rapport ; 2024:19
Keywords
Fire, heritage, inventory, church, fire blanket, fire covers, protection, mitigation, experiment. Brann, kulturminner, inventar, kirke, brannteppe, branntildekking, beskyttelse, innsats, eksperiment
National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-72589 (URN)978-91-89896-22-2 (ISBN)
Note

Funded by: The Directorate for Cultural Heritage in Norway (Riksantikvaren) and the Confederation of Churches and Nonprofits (Hovedorganisasjonen KA).

Available from: 2024-04-15 Created: 2024-04-15 Last updated: 2024-04-15Bibliographically approved
Fjellgaard Mikalsen, R., Fjærestad, J. S., Fredagsvik, N., Nergård, A. & Lie, A. (2024). FRIC webinar: Effekten av Bjørnis - Studie av effekten av Bjørnis på brannsikkerheten i norske husstander.
Open this publication in new window or tab >>FRIC webinar: Effekten av Bjørnis - Studie av effekten av Bjørnis på brannsikkerheten i norske husstander
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2024 (Norwegian)Other (Other academic)
Series
FRIC webinar D4.3-2023.11
National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-72587 (URN)
Note

Date: 13 februar 2024, kl 11.

Available from: 2024-04-11 Created: 2024-04-11 Last updated: 2024-04-19Bibliographically approved
Fjellgaard Mikalsen, R., Fjærestad, J. S., Fredagsvik, N., Nergård, A. & Lie, A. (2024). FRIC webinar: The effect of Bjørnis the fire mascot - The effect of Bjørnis for the fire safety in Norwegian households.
Open this publication in new window or tab >>FRIC webinar: The effect of Bjørnis the fire mascot - The effect of Bjørnis for the fire safety in Norwegian households
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2024 (English)Other (Other academic)
Series
FRIC webinar D4.3-2023.05
National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-72588 (URN)
Note

Date: 13 februar 2024, kl 13

Available from: 2024-04-11 Created: 2024-04-11 Last updated: 2024-04-19Bibliographically approved
Gribble, M. A., Fjellgaard Mikalsen, R. & Aamodt, E. (2024). Guidelines for protection of WUI structures in Norway. In: BOOK OF ABSTRACTS Nordic Fire & Safety: . Paper presented at Nordic Fire & Safety Days 2024 in Lund, Sweden. 18-19 June, 2024 (pp. 67). RISE Research Institutes of Sweden
Open this publication in new window or tab >>Guidelines for protection of WUI structures in Norway
2024 (English)In: BOOK OF ABSTRACTS Nordic Fire & Safety, RISE Research Institutes of Sweden , 2024, p. 67-Conference paper, Oral presentation with published abstract (Other academic)
Place, publisher, year, edition, pages
RISE Research Institutes of Sweden, 2024
Series
RISE Rapport ; 2024:49
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-73656 (URN)10.23699/yns7-3n56 (DOI)978-91-89971-08-0 (ISBN)
Conference
Nordic Fire & Safety Days 2024 in Lund, Sweden. 18-19 June, 2024
Note

This work has been conducted as a part of TREEADS which is funded by the European Union’s Horizon 2020 research and innovation program under grant agreement No 101036926. 

Available from: 2024-06-24 Created: 2024-06-24 Last updated: 2024-07-04Bibliographically approved
Sæter Bøe, A., Hox, K., Fjellgaard Mikalsen, R. & Friquin, K. L. (2024). Large-scale fire experiments in a cross-laminated timber compartment with an adjacent corridor – Partly and fully protected with a water sprinkler system. Fire safety journal, 148, Article ID 104212.
Open this publication in new window or tab >>Large-scale fire experiments in a cross-laminated timber compartment with an adjacent corridor – Partly and fully protected with a water sprinkler system
2024 (English)In: Fire safety journal, ISSN 0379-7112, E-ISSN 1873-7226, Vol. 148, article id 104212Article in journal (Refereed) Published
Abstract [en]

Two fire experiments have been conducted to study sprinkler system extinguishing performance in a compartment (13 m2) with an adjacent corridor (12 m2), both with exposed cross-laminated timber (CLT). Four nozzles were installed in the corridor and two in the compartment. In Experiment 1, the sprinkler system was fully functional and successfully controlled a concealed fire. In Experiment 2, nozzles in the compartment were disconnected, while the corridor nozzles were operative, giving flashover after 5 min with large flames emerging into the corridor, rapidly worsening evacuation conditions. Despite four activated nozzles in the corridor, the temperatures remained high, and flames spread through the corridor along the CLT ceiling and the upper parts of the wall, an area that was not effectively protected by the nozzles. After flashover, the compartment temperatures remained stable at ∼1000 °C until experiment termination at 96 min. This continued fire in the compartment can be explained by water from the corridor sprinklers not reaching this area, extensive radiative feedback by the CLT surfaces and delamination of CLT elements of the 20 mm layers. The charring rate was ≥1.1 mm/min for large parts of the exposed CLT wall and ceiling in the compartment during the fire. 

Place, publisher, year, edition, pages
Elsevier Ltd, 2024
Keywords
Fire extinguishers; Flashover; Hose; Laminating; Nozzles; Sprinkler systems (irrigation); Timber; Compartment fires; Cross laminated; Cross-laminated timber; Evacuation; Extinguishing systems; Fire experiments; Laminated timber; Large-scale fire experiments; Large-scales; Safety way-guidance; Fires
National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-74782 (URN)10.1016/j.firesaf.2024.104212 (DOI)2-s2.0-85197388636 (Scopus ID)
Note

The experiments were financed by the owners of the building, the Student Welfare Organisation in Trondheim, Norway. The publishing of the results has been financed by the Fire Research and Innovation Centre (FRIC), which is funded by its partners, by the Research Council of Norway (program BRANNSIKKERHET, project number 294649) and the Gjensidige Foundation.

Available from: 2024-08-27 Created: 2024-08-27 Last updated: 2024-08-27Bibliographically approved
Rosnes, M., Skilbred, E. S., Aamodt, E., Ståle Ertesvåg, I. & Fjellgaard Mikalsen, R. (2024). Study of fire characteristics of forest vegetation in the Atlantic coastal region of Norway. Paper presented at 4th European Symposium on Fire Safety Science 09/10/2024 - 11/10/2024 Barcelona, Spain. Journal of Physics, Conference Series, 2885(1), Article ID 012066.
Open this publication in new window or tab >>Study of fire characteristics of forest vegetation in the Atlantic coastal region of Norway
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2024 (English)In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 2885, no 1, article id 012066Article in journal (Refereed) Published
Abstract [en]

Understanding of wildfire risk requires an understanding of the natural species' fire dynamics. This study investigates fire characteristics of common wildland species in Norwegian forests – stair-step moss, lingonberry shrub, juniper, bilberry, and heather. Cone calorimetry experiments were conducted after conditioning samples to similar moisture content. Stair-step moss and bilberry stems exhibited longer burning times and lower peak heat release rates, suggesting a slower, more sustained combustion. Heather, despite age differences, showed similar fire behaviours, indicating moisture content's role in wildfire risk. Evergreens displayed the most intense fire development, with juniper potentially acting as a ladder species for vertical fire spread.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2024
National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-76256 (URN)10.1088/1742-6596/2885/1/012066 (DOI)
Conference
4th European Symposium on Fire Safety Science 09/10/2024 - 11/10/2024 Barcelona, Spain
Available from: 2024-12-03 Created: 2024-12-03 Last updated: 2024-12-03Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-0979-2369

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