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Accession number;99A0228795
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| Title;Modeling of Phase Characteristics of Strong Earthquake Motion. |
| Author;
SATO TADANOBU
(Disaster Prev. Res. Inst., Kyoto Univ.)
MURONO YOSHITAKA
(Railw. Tech. Res. Inst.)
NISHIMURA AKIHIKO
(Railw. Tech. Res. Inst.)
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Journal Title;Proceedings of JSCE (Japan Society of Civil Engineers)
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Journal Code:F0028A
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ISSN:0289-7806
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VOL.;NO.612;PAGE.201-213(1999)
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| Figure&Table&Reference;FIG.32, TBL.2, REF.22 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Modeling phase characteristics of earthquake ground motion is important to synthesis a design earthquake motion consistent with the given response spectra. We assume that an earthquake ground motion can be expressed by the convolution of the two time functions; 1) the time delay caused by rupture propagation on the fault plane which is assumed to be expressed by a train of impulses, 2) the effect of path of transmission. This paper presents a simple method to model phase characteristics of earthquake motion using the concept of group delay time. A method to model the group delay time of a train of impulses is proposed. The phase shift due to the transmitting path of seismic wave motion is also expressed by the minimum phase transfer function of its amplitude spectrum. (author abst.) |
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