Ambient Vibration Tests and Finite Element Analysis for Dynamic Properties of Brick Masonry Inverted Bell-shaped Chedi

This research is aimed to study fundamental dynamic properties of an esteemed brick masonry inverted bell-shaped chedi at Phrathat Doi Suthep temple, Chiangmai, Thailand, by using full-scale ambient vibration tests associated with the finite element analysis. The study results showed that the finite element analysis indicated 3.817 Hz, 3.836 Hz and 9.294 Hz for the natural frequencies of the first modes on the x, y and torsion directions. From the ambient vibration measurements, the frequencies were 4.086 Hz, 4.025 Hz and 10.819 Hz. In comparison, the finite element gives the similar frequency values with the measured ones. The discrepancies are respectively 6.59, 4.70 and 14.09 percent. Hence, the validation of the finite element model has been made and used for vibration analysis presented in the accompanied paper (Seismic Performances of Brick Masonry Inverted Bell-Shaped Chedi)