Mitigating footfall-induced vibrations in cross-laminated timber floor-panels by using beech or birch
Jonasson, Johannes LU ; Persson, Peter LU and Danielsson, Henrik LU
(2024)
In Journal of Building Engineering
86(108751).
- Abstract
Long-span floors are particularly sensitive to footfall-induced vibrations, making their analysis and design critical for ensuring occupant comfort. Cross-laminated timber (CLT) panels have high stiffness relative to their self-weight and are commonly made of spruce. Hardwoods such as birch and beech possess higher stiffness and mass density, which can potentially improve the vibrational performance of CLT panels. In this study, the vibrational performance of CLT panels made of beech and birch with different mechanical properties was investigated using finite element (FE) models calibrated via experimental modal analysis (EMA) tests, yielding calibration with less than 1% error in natural frequencies. The study demonstrated that birch... (More)
Long-span floors are particularly sensitive to footfall-induced vibrations, making their analysis and design critical for ensuring occupant comfort. Cross-laminated timber (CLT) panels have high stiffness relative to their self-weight and are commonly made of spruce. Hardwoods such as birch and beech possess higher stiffness and mass density, which can potentially improve the vibrational performance of CLT panels. In this study, the vibrational performance of CLT panels made of beech and birch with different mechanical properties was investigated using finite element (FE) models calibrated via experimental modal analysis (EMA) tests, yielding calibration with less than 1% error in natural frequencies. The study demonstrated that birch or beech laminations, compared with spruce ones, can provide a significant mitigation of vibrational responses, both for broadband (to approximately 40% of the spruce reference level) and footfall-induced vibrations (to approximately 20%–30% of the spruce reference level). It is noteworthy that low quality beech can result in a marked amplification that may nearly double the level of footfall-induced vibrations.
(Less)
- author
- Jonasson, Johannes
LU
; Persson, Peter
LU
and Danielsson, Henrik
LU
- organization
- publishing date
- 2024
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Beech, Birch, Cross-laminated timber, Experimental modal analysis, Finite element method, Floor vibrations
- in
- Journal of Building Engineering
- volume
- 86
- issue
- 108751
- article number
- 108751
- pages
- 25 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85186114935
- scopus:85186114935
- ISSN
- 2352-7102
- DOI
- 10.1016/j.jobe.2024.108751
- language
- English
- LU publication?
- yes
- id
- 1f7b3840-e99c-4b16-8f15-cb8994753f8a
- date added to LUP
- 2024-03-01 15:12:53
- date last changed
- 2024-04-10 08:57:39
@article{1f7b3840-e99c-4b16-8f15-cb8994753f8a,
abstract = {{<p>Long-span floors are particularly sensitive to footfall-induced vibrations, making their analysis and design critical for ensuring occupant comfort. Cross-laminated timber (CLT) panels have high stiffness relative to their self-weight and are commonly made of spruce. Hardwoods such as birch and beech possess higher stiffness and mass density, which can potentially improve the vibrational performance of CLT panels. In this study, the vibrational performance of CLT panels made of beech and birch with different mechanical properties was investigated using finite element (FE) models calibrated via experimental modal analysis (EMA) tests, yielding calibration with less than 1% error in natural frequencies. The study demonstrated that birch or beech laminations, compared with spruce ones, can provide a significant mitigation of vibrational responses, both for broadband (to approximately 40% of the spruce reference level) and footfall-induced vibrations (to approximately 20%–30% of the spruce reference level). It is noteworthy that low quality beech can result in a marked amplification that may nearly double the level of footfall-induced vibrations.</p>}},
author = {{Jonasson, Johannes and Persson, Peter and Danielsson, Henrik}},
issn = {{2352-7102}},
keywords = {{Beech; Birch; Cross-laminated timber; Experimental modal analysis; Finite element method; Floor vibrations}},
language = {{eng}},
number = {{108751}},
publisher = {{Elsevier}},
series = {{Journal of Building Engineering}},
title = {{Mitigating footfall-induced vibrations in cross-laminated timber floor-panels by using beech or birch}},
url = {{http://dx.doi.org/10.1016/j.jobe.2024.108751}},
doi = {{10.1016/j.jobe.2024.108751}},
volume = {{86}},
year = {{2024}},
}