Date of Award
5-17-2025
Document Type
Masters Project
Abstract
The purpose of this master’s project is to complete a modal analysis of the Joseph E. Usibelli Engineering Learning and Innovation Building. The modal analysis was conducted in two ways: by completing a spectral analysis using data collected from 7 seismometers and using a computer model of the building’s structural Lateral Force Resisting System. Power spectrum density plots were generated using a Fast Fourier transform routine within MATLAB to identify the natural periods of the building. A building model was created in RISA-3D using construction plan sets to apply a dynamic load and then to find the natural periods of the building. Accurate results from a spectral analysis require multiple earthquakes that have a seismic input at low frequencies. The results in this report found a maximum of two fundamental modes using spectral analysis, which matched well with eigenvalues from the RISA-3D model. The advantage of the spectral analysis is that it is a direct representation of what is going on inside the building. In contrast, the dynamic analysis is used to benchmark the results.
Recommended Citation
Kulikovskiy, David, "Modal investigation of the Usibelli Building using spectral and dynamic analysis" (2025). Engineering . 544.
https://ualaska.researchcommons.org/uaf_grad_engineering/544
Handle
http://hdl.handle.net/11122/16318