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자료유형
학술저널
저자정보
저널정보
국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.50 No.2
발행연도
2014.1
수록면
137 - 149 (13page)

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In this study, modal parameters such as natural frequencies, mode shapes and damping ratios ofRC frames with low strength are determined for different construction stages using ambient vibration test. For this purpose full scaled, one bay and one story RC frames are produced and tested for plane, brick infilledand brick in-filled with plaster conditions. Measurement time, frequency span and effective modenumber are determined by considering similar studies and literature. To obtain experimental dynamiccharacteristics, Enhanced Frequency Domain Decomposition and Stochastic Subspace Identificationtechniques are used together. It is shown that the ambient vibration measurements are enough to identify themost significant modes of RC frames. The results indicate that modal parameters change significantlydepending on the construction stages. In addition, Infill walls increase stiffness and change the mode shapesof the RC frame. There is a good agreement between mode shapes obtained from brick in-filled and in-filledwith plaster conditions. However, some differences are seen in plane frame, like expected. Dynamiccharacteristics should be verified using finite element analysis. Finally, inconsistency between experimentaland analytical dynamic characteristics should be minimize by finite element model updating using someuncertain parameters such as material properties, boundary condition and section properties to reflect thecurrent behavior of the RC frames.

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