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Key terms
FEMA P-547, Seismic Force, Structural Retrofitting
A considerable number of buildings in North America present a risk of poor performance during an earthquake event as they were constructed prior to seismic design codes or the available code used was immature and presents flaws. discontinuity...
Key terms
Soft Storeys, Seismic Force, Earthquake Risk
A large number of moment frame buildings have been constructed for specific purposes and may contain large area for parking, reception lobbies, etc. These kinds of open spaces void of any infill walls are called soft storey buildings. Storeys with these kinds of open spaces are considered as having stiffness discontinuity...
Key terms
Non-Structural Components, Seismic Mitigation, Earthquake Risk
Potential economic losses from damages to structures due to earthquakes can reach billions of dollars in densely populated areas. For instance, the total direct economic losses of $25 billion due to damaged buildings was paid by government and private insurance sources for recovery and reconstruction in California...
Key terms
Forced Vibration Test, Ambient Vibration Test,
Ambient Vibration Tests
The dynamic properties of structures can be extracted from both forced and ambient vibrations tests. The identification of the modal parameters by EMA techniques becomes more challenging in the presence of large-scale structures with low frequency ranges...
Key terms
Forced Vibration Test, Experimental Modal Analysis,
Input-Output Modal Identification
Experiment Modal Analysis (EMA) has been the conventional modal identification technique used by civil engineering for more than six decades. This approach uses an input excitation of known force levels and frequencies, both controlled by the experimentalist...
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