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Dynamic Characterization and Vibration Analysis of a Four-Story Mass Timber Building

https://research.thinkwood.com/en/permalink/catalogue2213
Year of Publication
2019
Topic
Acoustics and Vibration
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems

Experimental modal analysis of a cross-laminated timber slab

https://research.thinkwood.com/en/permalink/catalogue3009
Year of Publication
2022
Topic
Acoustics and Vibration
Material
CLT (Cross-Laminated Timber)
Author
Kawrza, M.
Furtmüller, T.
Adam, C.
Maderebner, R.
Organization
University of Innsbruck
Publisher
Elsevier
Year of Publication
2022
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Acoustics and Vibration
Keywords
Experimental Modal Analysis
Complex Mode Shapes
Modal Parameter Estimation
Conference
37th Danubia Adria Symposium on Advances in Experimental Mechanics
Research Status
Complete
Series
Materials Today: Proceedings
Summary
This paper presents the results of an investigation of the dynamic response of a point-supported cross-laminated timber (CLT) slab without joists with a column grid of 5.0 × 5.0 m and overall dimensions of 16.0 × 11.0 × 0.2 m. The results are based on a detailed experimental modal analysis, identifying seven modes from the dynamic response of 651 measurement points, including natural frequencies, mode shapes and damping ratios. These modal parameters exhibit a time variance that is due to environmental influences during the measurement period of two days. As a result of this disturbance effect, the determined mode shapes have a non-negligible imaginary part, which is eliminated by correcting each of the 73 measurements individually. The findings presented provide in-depth insight into the dynamic behavior of the large-scale CLT structure with point supports realized with a novel steel connector.
Online Access
Free
Resource Link
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Modal Vibration Testing of an Innovative Timber Structure

https://research.thinkwood.com/en/permalink/catalogue1494
Year of Publication
2016
Topic
Acoustics and Vibration
Material
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Hybrid Building Systems
Author
Leyder, Claude
Frangi, Andrea
Chatzi, Eleni
Year of Publication
2016
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Hybrid Building Systems
Topic
Acoustics and Vibration
Keywords
Beech
Post-Tensioned
Modal Vibration Tests
Eigenfrequencies
Damping Ratios
Mode Shapes
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 177-185
Summary
This research paper deals with the evaluation of the dynamic modal vibration tests conducted on an innovative timber structure, the ETH House of Natural Resources. The building serves as a demonstrator of several innovative structural systems and technologies relating to timber. The main load-bearing structure comprises a posttensioned timber frame, which was subjected to modal vibration tests, firstly in the laboratory and, subsequently on the construction site. In this paper, the modal characteristics (eigenfrequencies, damping ratios and mode shapes), obtained from the laboratory testing campaign are presented. The modal vibration data is evaluated using polynomial and subspace identification techniques. The obtained results reveal that the structure exhibits pure translational, beam and column modes, as well as mixed beam-column modes. The bottom connection of the columns delivers significant influence on the modal characteristics, whereas the level of post-tensioning force yields no substantial influence in the modal characteristics obtained from low amplitude modal vibration tests.
Online Access
Free
Resource Link
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