Relationship between Building Damage Ratios and Ground Motion Characteristics during the 2011 Tohoku Earthquake

• WU Hao

  Graduate School of Engineering, Aichi Institute of Technology

• MASAKI Kazuaki

  Department of Urban Environment, Aichi Institute of Technology

• IRIKURA Kojiro

  Disaster Prevention Research Center, Aichi Institute of Technology

• SAGUCHI Koichiro

  Department of Environmental Science and Technology, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

• KURAHASHI Susumu

  Disaster Prevention Research Center, Aichi Institute of Technology

• WANG Xin

  Disaster Prevention Research Center, Aichi Institute of Technology

Abstract

Fragility curves, the relationships between three kinds of building damage ratios, i.e., total collapse ratio (TCR), collapse ratio (CR) and damage ratio (DR), as well as ground motion characteristics, i.e., peak ground acceleration (PGA), peak ground velocity (PGV), Japan Meteorological Agency instrumental seismic intensity (IJMA) and spectral intensity (SI), were studied for the 2011 Tohoku Earthquake. It was found that the DR was related better to ground motion characteristics than the TCR and CR during this earthquake, and the correlation between the DR and any one of the PGV, IJMA or SI indices was almost the same. The DR during the 2011 Tohoku Earthquake reached almost the same level as that during the Kobe Earthquake for the same level of ground motions. There were some districts where the DRs did not always correspond to reasonable levels of ground motion characteristics. One reason for this was considered to be the representativeness of the ground motions over each district. Thus, one method of estimating ground motions at damaged sites was proposed by using the underground velocity structures identified from the H/V spectral ratios of microtremors, after we confirmed the consistency of the H/V spectral ratios between earthquakes and microtremors. It is expected to be used for the construction of fragility curves with greater accuracy.

Journal

• Journal of Natural Disaster Science

  Journal of Natural Disaster Science 34 (1), 59-78, 2012

  Japan Society for Natural Disaster Science

Keywords

• ‌building damage ratio
• ground motion characteristics
• underground velocity structure
• H/V spectral ratio

Details

• CRID: 1390282681463204480
• NII Article ID: 130005069372
• DOI: 10.2328/jnds.34.59
• ISSN: 24346705
• ISSN: 03884090
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed