A comprehensive vibroacoustic investigation of a cross laminated timber floor

Caniato, Marco; Bettarello, Federica; Granzotto, Nicola; Marzi, Arianna; Gasparella, Andrea

doi:10.1016/j.conbuildmat.2021.126303

Cited by 3 publications

(4 citation statements)

References 52 publications

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“…The dynamic response of structural elements, especially floors, is an important consideration in building design since it relates to sound insulation and vibration performance. [1][2][3][4][5] Humans spend upwards of 90% of their time in buildings, 6 and poor sound insulation has short-term health consequences such as annoyance, 7 sleep loss, 8,9 and fatigue. 10,11 Worse, failure to have proper sound attenuation can cause occupants to develop long-term health consequences including hypertension and depression.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the dynamic response for scaled models of shaped concrete floor slabs

2023

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The dynamic response of building structures is an essential design consideration in building acoustics. However, building design is increasingly driven by sustainability goals. Floors can be optimized to reduce material consumption and corresponding carbon emissions, yet geometric changes may cause sound insulation and vibration problems. Although the dynamic performance of traditional floors is well established, the performance of non-traditional shapes is less understood. Before trusting the results of building simulations encompassing optimized floors, the dynamic results should first be validated experimentally. This paper details a numerical finite element analysis method to ascertain the dynamic response of four shaped concrete slabs, with experimental modal analysis used to validate the numerical results. The material properties in the numerical model are updated to match the experimental results. The findings support a computational framework for determining the dynamic response of shaped structures that can then be implemented in future large-scale building models.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the dynamic response for scaled models of shaped concrete floor slabs

2023

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“…This problem amplifies considering variations between the similar sample structures from different wood types (base material), manufacturers, and productions [21,32]. There is also limited characterization with acoustic descriptors for CLT components, while studies focus mostly on structural behavior [25,33]. Lately, airborne and impact sound insulation have attracted interest, especially for floor partitions [33].…”

Section: Introductionmentioning

confidence: 99%

“…There is also limited characterization with acoustic descriptors for CLT components, while studies focus mostly on structural behavior [25,33]. Lately, airborne and impact sound insulation have attracted interest, especially for floor partitions [33].…”

Section: Introductionmentioning

confidence: 99%

“…The study aims to provide information on improved solutions for acoustically efficient CLT floor configurations, with laboratory data and insights in measurements. Each case, as a combination of materials and group properties, is characterized acoustically, attempting to narrow the widely reported gap in acoustic data [8,9,[31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

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Evaluating Laboratory Measurements for Sound Insulation of Cross-Laminated Timber (CLT) Floors: Configurations in Lightweight Buildings

2022

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Cross-laminated timber (CLT) floors with supplementary layers or floating floors comprise a common solution in new multistory timber structures. However, bare CLT components provide poor sound insulation, especially in low frequencies during structure-borne sound propagation. Thus, floor configurations in wooden buildings deploy more layers for improved acoustic behavior. Twelve contemporary CLT floors were analyzed after laboratory measurements of airborne sound reduction and impact sound transmission utilizing the following indicators: Rw, Rw, 100, Rw, 50, Ln,w, Ln,w,100, and Ln,w,50 (per ISO 10140, ISO 717). An increase in sound insulation was achieved thanks to added total mass and thickness, testing layers of the following: elastic mat for vibration isolation, wool insulation, gypsum boards, plywood, concrete screed, and wooden parquet floor. The results indicate that multilayered CLT floors can provide improvements of up to 22 dB for airborne sound and 32 dB for impact sound indicators compared with the bare CLT slab. Floating floor configurations with dry floor solutions (concrete screed) and wooden parquet floors stand out as the optimal cases. The parquet floor provides a 1–2 dB improvement only for impact sound indicators in floating floor setups (or higher in three cases).

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Innovative solutions to improved sound insulation of CLT floors

Ljunggren

2023

Developments in the Built Environment

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A comprehensive vibroacoustic investigation of a cross laminated timber floor

Cited by 3 publications

References 52 publications

Evaluation of the dynamic response for scaled models of shaped concrete floor slabs

Evaluation of the dynamic response for scaled models of shaped concrete floor slabs

Evaluating Laboratory Measurements for Sound Insulation of Cross-Laminated Timber (CLT) Floors: Configurations in Lightweight Buildings

Innovative solutions to improved sound insulation of CLT floors

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