Abstract

This paper presents the results of the vibration performance of two CLT slabs in a 5-story building. The CLT slabs are 165 mm thick, 4.2 m long, and 6.6 m wide, with different non-structural cladding on their top and bottom faces. The experimental campaign considered two types of vibration tests. The first was a modal impact test to determine the main dynamic properties of the slabs. For this purpose, seven uniaxial accelerometers were installed on the slabs. The second was a walking test in which people of different body masses walked on the CLT slabs at different step frequencies along a predefined trajectory. The vibration dose value (VDV) and one-step root mean square velocity (OS-VRMS) indicators were used to evaluate the level of vibrations in the CLT slabs. Three relevant dynamic properties were detected, with vibration frequencies between 23 Hz and 36 Hz and damping ratios between 2.4% and 4.2%. The results suggest that in real buildings, the vibration performance of CLT floors could be better than the estimations from some standards; therefore, future work is required to calibrate the numerical models of the CLT slabs to have more accurate predictions. © (2025) WORLD CONFERENCE ON TIMBER ENGINEERING 2025 (WCTE 2025) All rights reserved.