Modal analysis of CLT beams: Measurements and predictive simulations
(2022) 8th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2022 p.56-62- Abstract
- Cross-laminated timber (CLT) as a prime example of an innovative product within the field of civil engineering has over the recent years attracted attention of the construction industry and engineers around the world. As a natural composite with different orientation of layers in addition to anisotropic properties of wood, CLT can be a challenging material in predictive numerical modelling. This is possibly due to uncertainty in the mechanical behaviour of the material owing to its growing conditions. In addition, timber structures are more sensitive to vibrations and structure-borne sound at low frequencies than conventional concrete based structures. Therefore, a thorough understanding of dynamic characteristics of CLT and accurate... (More)
- Cross-laminated timber (CLT) as a prime example of an innovative product within the field of civil engineering has over the recent years attracted attention of the construction industry and engineers around the world. As a natural composite with different orientation of layers in addition to anisotropic properties of wood, CLT can be a challenging material in predictive numerical modelling. This is possibly due to uncertainty in the mechanical behaviour of the material owing to its growing conditions. In addition, timber structures are more sensitive to vibrations and structure-borne sound at low frequencies than conventional concrete based structures. Therefore, a thorough understanding of dynamic characteristics of CLT and accurate predictive models can enhance its potential in the construction industry. This work presents a numerical and an experimental modal analysis of CLT beams within a frequency range relevant for vibrations and structure-borne sound. In the experimental investigation, a series of CLT beams with dimensions 120 120 2000 [mm3], cut from a larger CLT plate, composed of two covering layers of Norway spruce and a mid-layer of Scots pine are studied. Resonant frequencies, bending and torsional modes are utilised for a thorough study of the beams. The results are presented in terms of statistical variation in experimental resonant frequencies. Furthermore, a numerical sensitivity study with respect to variation in the mechanical properties of CLT is presented. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7a1cad7f-0f11-465b-a172-dea5acebba7f
- author
- Bondsman, Benjamin LU ; Flodén, Ola LU ; Danielsson, Henrik LU ; Persson, Peter LU and Serrano, Erik LU
- organization
- publishing date
- 2022-09-05
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- modal analysis, Cross-laminated timber (CLT), Experimental dynamics, resonance frequency
- host publication
- Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems : Proceedings of The Eighth International Conference on Structural Engineering, Mechanics and Computation, 5-7 September 2022, Cape Town, South Africa - Proceedings of The Eighth International Conference on Structural Engineering, Mechanics and Computation, 5-7 September 2022, Cape Town, South Africa
- editor
- Zingoni, Alphose
- article number
- 3
- pages
- 6 pages
- publisher
- CRC Press/Balkema
- conference name
- 8th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2022
- conference location
- Cape Town, South Africa
- conference dates
- 2022-09-05 - 2022-09-07
- external identifiers
-
- scopus:85145580276
- ISBN
- 9781003348443
- DOI
- 10.1201/9781003348443-9
- language
- English
- LU publication?
- yes
- id
- 7a1cad7f-0f11-465b-a172-dea5acebba7f
- date added to LUP
- 2022-09-17 18:29:29
- date last changed
- 2023-04-06 07:44:05
@inproceedings{7a1cad7f-0f11-465b-a172-dea5acebba7f, abstract = {{Cross-laminated timber (CLT) as a prime example of an innovative product within the field of civil engineering has over the recent years attracted attention of the construction industry and engineers around the world. As a natural composite with different orientation of layers in addition to anisotropic properties of wood, CLT can be a challenging material in predictive numerical modelling. This is possibly due to uncertainty in the mechanical behaviour of the material owing to its growing conditions. In addition, timber structures are more sensitive to vibrations and structure-borne sound at low frequencies than conventional concrete based structures. Therefore, a thorough understanding of dynamic characteristics of CLT and accurate predictive models can enhance its potential in the construction industry. This work presents a numerical and an experimental modal analysis of CLT beams within a frequency range relevant for vibrations and structure-borne sound. In the experimental investigation, a series of CLT beams with dimensions 120 120 2000 [mm3], cut from a larger CLT plate, composed of two covering layers of Norway spruce and a mid-layer of Scots pine are studied. Resonant frequencies, bending and torsional modes are utilised for a thorough study of the beams. The results are presented in terms of statistical variation in experimental resonant frequencies. Furthermore, a numerical sensitivity study with respect to variation in the mechanical properties of CLT is presented.}}, author = {{Bondsman, Benjamin and Flodén, Ola and Danielsson, Henrik and Persson, Peter and Serrano, Erik}}, booktitle = {{Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems : Proceedings of The Eighth International Conference on Structural Engineering, Mechanics and Computation, 5-7 September 2022, Cape Town, South Africa}}, editor = {{Zingoni, Alphose}}, isbn = {{9781003348443}}, keywords = {{modal analysis; Cross-laminated timber (CLT); Experimental dynamics; resonance frequency}}, language = {{eng}}, month = {{09}}, pages = {{56--62}}, publisher = {{CRC Press/Balkema}}, title = {{Modal analysis of CLT beams: Measurements and predictive simulations}}, url = {{http://dx.doi.org/10.1201/9781003348443-9}}, doi = {{10.1201/9781003348443-9}}, year = {{2022}}, }