Evaluation of Tsunami Wave Loads Acting on Walls of Confined-Masonry-Brick and Concrete-Block Houses

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  • Shoji Gaku
    Division of Engineering Mechanics and Energy, Faculty of Engineering, Information and Systems, University of Tsukuba
  • Shimizu Hirofumi
    Formerly, Graduate School of Systems and Information Engineering, University of Tsukuba
  • Koshimura Shunichi
    International Research Institute of Disaster Science, Tohoku University
  • Estrada Miguel
    Japan-Peru Center for Earthquake Engineering Research and Disaster Mitigation (CISMID) National University of Engineering
  • Jimenez Cesar
    Fenlab, Universidad Nacional Mayor de San Marcos (UNMSM)

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Abstract

<p>Damage to confined-masonry-brick or concrete-block house was assessed for being subjected to a tsunami wave load. This study was prompted by recent three tsunamis – one during 2001 on the Near Coast of Peru, one in 2009 in the Samoa Islands, and one in 2010 in Maule, Chile. We analyzed 13 damaged walls from 10 single-storey houses located near the coastline. We focused on evaluating the tsunami wave pressure distribution on house walls. Based on the formula proposed by Asakura et al. (2000) to evaluate tsunami wave pressure distribution on a structural component located on land behind on-shore structures, which is used for designing a tsunami evacuation building, we identify the values of horizontal wave pressure index a in Asakura’s formula for walls and discuss the boundary value of a at which a wall presents structural damage, such as in collapse and cracking failure modes.</p>

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