Earthquake Barcode from a Single-Degree-of-Freedom System

DOI: 10.4236/ns.2015.71003   PDF   HTML   XML   2,728 Downloads   3,358 Views   Citations


Earthquake is a violent and irregular ground motion that can severely damage structures. In this paper we subject a single-degree-of-freedom system, consisting of spring and damper, to an earthquake excitation, and meanwhile investigate the response behavior from a novel theory about the dynamical system, by viewing the time-varying signum function of It can reflect the characteristic property of each earthquake through and the second component of f, where is a time-sampling record of the acceleration of a ground motion. The barcode is formed by plotting with respect to time. We analyze the complex jumping behavior in a barcode and an essential property of a high percentage occupation of the first set of dis-connectivity in the barcode from four strong earthquake records: 1940 El Centro earthquake, 1989 Loma earthquake, and two records of 1999 Chi-Chi earthquake. Through the comparisons of four earthquakes, we can observe that strong earthquake leads to large percentage of the first set of dis-connectivity.

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Liu, C. and Chang, C. (2015) Earthquake Barcode from a Single-Degree-of-Freedom System. Natural Science, 7, 18-31. doi: 10.4236/ns.2015.71003.

Conflicts of Interest

The authors declare no conflicts of interest.


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