Wooden basements; hygrothermal performance analysis using in-field measurements and numerical simulations

Rahiminejad, Mohammad; Räber, Valentin; Ghazi Wakili, Karim; Geyer, Christoph; Zöllig, Stefan; Renfer, Christoph (2024). Wooden basements; hygrothermal performance analysis using in-field measurements and numerical simulations Building and Environment, 256(256), p. 111475. Science Direct 10.1016/j.buildenv.2024.111475

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Basements represent an essential component of modern building design, serving as foundational structures with multifaceted roles in both residential and commercial constructions. The use of wood as a natural and cost-effective material for basement construction plays a significant role in shaping the future, demanding well-established concepts to ensure sustainability. This paper presents an investigation of the hygrothermal behavior of basements built with wood elements, utilizing a combined approach of in-field measurements and numerical simulations. The variations in the temperature and relative humidity in different parts of the construction are monitored through a full-year measuring campaign in a reference building located in Switzerland. The measured data are used to first, analyze the performance of the structure in real operative conditions, and second, to validate the numerical model employed for the long-term performance evaluation of the building. Further numerical simulations are carried out to examine the reaction of the construction to various critical conditions. The results of the in-field measurements and numerical simulations ensure the applicability of using wooden elements in the basement structure under the conditions investigated in this study. The results revealed that the wood moisture stays below 18% as the limiting value specified by the standards. It is also shown that the wooden basement examined in this research has a satisfactory long-term performance with no concerns regarding moisture-related issues in terms of wood decay and mold growth. The risk analysis also demonstrated that the impact of the high initial moisture in the wooden elements on the hygrothermal performance of the assembly is higher compared to the high moisture load in the indoor space and the presence of a moisture source in the cold side of the insulation layer. The outcomes of this study contribute to the advancement of sustainable building practices, enhancing energy efficiency, and improving the resilience of wooden basements

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Architecture, Wood and Civil Engineering School of Architecture, Wood and Civil Engineering > Institute for Timber Construction IHB School of Architecture, Wood and Civil Engineering > Institute for Timber Construction IHB > Fire Safety group FGBS School of Architecture, Wood and Civil Engineering > Institute for Timber Construction IHB > Timber Structures group FGH School of Architecture, Wood and Civil Engineering > Institute for Timber Construction IHB > Building Envelope and Building Physics group FGGB
Name:	Rahiminejad, Mohammad; Räber, Valentin; Ghazi Wakili, Karim; Geyer, Christoph; Zöllig, Stefan and Renfer, Christoph
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction
ISSN:	03601323
Publisher:	Science Direct
Projects:	[UNSPECIFIED] Untergeschosse in Holz
Language:	English
Submitter:	Mohammad Rahiminejad
Date Deposited:	16 Apr 2024 14:53
Last Modified:	21 Apr 2024 01:40
Publisher DOI:	10.1016/j.buildenv.2024.111475
Uncontrolled Keywords:	Wooden basement Hygrothermal analysis In-field measurements Numerical simulations Sustainable constructions
ARBOR DOI:	10.24451/arbor.21749
URI:	https://arbor.bfh.ch/id/eprint/21749