One-Year Dynamic Monitoring of an Eight Story CLT Building

This paper outlines the initial findings derived from a year-long dynamic monitoring of an eight-story Cross-Laminated Timber (CLT) building situated in As, Norway. The authors conducted bi-daily dynamic response measurements of the structure since November 2022. In tandem, the environmental humidity, and wind speed were also monitored. A key aspect of the study lies in examining of the interplay between environmental factors and modal parameters, with a specific emphasis on temperature. The analysis reveals that the first two bending modes of the structure exhibit a positive correlation with external temperature, with coefficients of determination of 0.44 and 0.25, respectively. The study also discusses the expected negative correlation between the natural frequencies and moisture content of wood, based on general wood behavior principles.