Tsunami Fragility — A New Measure to Identify Tsunami Damage —

Abstract

Tsunami fragility (fragility curve, or fragility function) is a new measure, we propose, for estimating structural damage and fatalities due to tsunami attack, by integrating satellite remote sensing, field survey, numerical modeling, and historical data analysis with geographic information system (GIS). Tsunami fragility is expressed as the structural damage probability or fatality ratio related to hydrodynamic features of tsunami inundation flow, such as inundation depth, current velocity and hydrodynamic force. It expands the capability of estimating potential tsunami damage in a quantitative manner.

Developing Tsunami fragility curves using remote sensing and survey data of the 2010 Chilean Tsunami in Dichato

“…According to Koshimura et al (2009a), "tsunami fragility" was introduced as a new measure for the estimation of tsunami damage to buildings. The probability of structural damage is estimated from the hydrodynamic features of tsunamis.…”

“…From the field survey of the great event of 2010 in Chile and the damage recognition through satellite images, a first proposal of a tsunami fragility curve for a high risk area such as the peruvian and chilean coasts is presented here. Three methods are originally described by Koshimura et al (2009a) and Suppasri et al (2011). In this study we briefly describe the three original methods plus a fourth approach resulting from the practical combination of the last two methods.…”

“…In this study we briefly describe the three original methods plus a fourth approach resulting from the practical combination of the last two methods. Koshimura et al (2009a) developed tsunami fragility curves based on the historical data and records of building damage in Japan. Japan is one of the nations with a long history of event records, especially in the case of tsunamis.…”

“…Tsunami fragility is a new measure for the estimation of structural damage and fatalities due to tsunami by integrating satellite remote sensing, field survey, numerical modeling, and historical data analysis with the geographic information system (GIS) (Koshimura et al, 2009b). The term "tsunami fragility" was introduced by Koshimura et al (2009b), and so was its determination by numerical method (Koshimura and Yanagisawa, 2007;Koshimura et al, 2009a). A fragility curve is developed here for the area of Dichato in Chile.…”

Building Damage Assessment Using Scenario Based Tsunami Numerical Analysis and Fragility Curves

“…Fragility curves are a preferred method to produce vulnerability information regarding structures affected by a number of features [5]. The concept of tsunami fragility was introduced in [6] to assess tsunami damage using remote sensing, numerical model results, field surveys and historical records to develop estimates of structure fragility and fatalities. Following the 2004 and 2011 tsunamis, the concept of fragility curves for structures to complete structure collapse.…”