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Characteristics of Earthquake Ground Motion of Repeated Sequences

In: Improving the Earthquake Resilience of Buildings

Author

Listed:
  • Izuru Takewaki

    (Kyoto University)

  • Abbas Moustafa

    (Minia University)

  • Kohei Fujita

    (Kyoto University)

Abstract

Ground acceleration sequences separated by short time intervals have been observed at several parts of the world including Japan, Mexico, Turkey, Italy, and California. However, such ground motion data are not available in catalogs for easy access to structural engineers. It should be emphasized that the 2011 off the Pacific coast of Tohoku earthquake had multiple sources and exhibited multiple sequences. Ground motion sequences can create significant damage in structures due to the accumulation of the inelastic deformation from the repeated sequences before any structural repair is possible. Additionally, the low-frequency content in secondary sequences may cause resonance in lower modes of the damaged structure leading to further damage to the structure (see Chap. 10). Accordingly, the verification of the structure adequacy to withstand multiple acceleration sequences without collapse is of essential concern in earthquake engineering, especially since current seismic codes do not account for their effects.

Suggested Citation

  • Izuru Takewaki & Abbas Moustafa & Kohei Fujita, 2013. "Characteristics of Earthquake Ground Motion of Repeated Sequences," Springer Series in Reliability Engineering, in: Improving the Earthquake Resilience of Buildings, edition 127, chapter 0, pages 93-113, Springer.
    • Handle: RePEc:spr:ssrchp:978-1-4471-4144-0_5
    DOI: 10.1007/978-1-4471-4144-0_5
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