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Erschienen in:
2015 | OriginalPaper | Buchkapitel
2. Effect of Foundation Rocking on the Dynamic Characteristics of a 30-Story Concrete Shear Wall Building
verfasst von : Salman Soleimani-Dashtaki, Ferya Moayedi, Carlos E. Ventura
Erschienen in: Dynamics of Civil Structures, Volume 2
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Abstract
The dynamic characteristics of a structure after the completion of its construction phase can be determined using ambient vibration measurement techniques. A newly constructed 30 stories tall reinforced concrete building in Burnaby, British Columbia, Canada, is tested using this technique. The experimental results reveal the dynamic characteristics of the investigated building including the building rocking and sliding at the foundation level. The method used is the advanced system identification using enhanced signal processing techniques based on the fundamentals of frequency domain decomposition. The paper expands on the technique, from the basics of the test setups to the details of the analysis.
A total of 15 natural periods of vibration are successfully identified including the translational and torsional modes (up to mode 5). The modal estimation is performed using the techniques such as the Enhanced Frequency Domain Decomposition (EFDD), the Curve-fit Frequency Domain Decomposition (CFDD), and the Frequency Domain Operating Deflection Shapes (FDODS); and the outcomes are compared against each other. The modes found from the analytical ETABS models of the building at the structural design phase are then compared and calibrated against the obtained experimental results.