Development of Seismic Risk Evaluation System for Small Earth Dams

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  • ため池地震危険度評価システムの構築
  • タメイケ ジシン キケンド ヒョウカ システム ノ コウチク ゲイヨ ジシン ニ ヨル エヒメケン ノ タメイケ ヒガイ オ ジレイ ト シテ
  • A Case Study thlough the Geiyo Earthquake in 2001
  • 芸予地震による愛媛県のため池被害を事例として

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Abstract

This paper shows a simple system for seismic risk evaluation of small earth dams. The data of site investigation for damaged dams and “Database System on Small Earth Dam for Preventing Disaster” is used to this system and the neural networks are applied to the proposed methodology. Factors of earthquake damage are assumed to be 16 characteristics of a dam and an earthquake;(1) dam type, (2) dam height, (3) crest length, (4) crest width, (5) upstream slope, (6) downstream slope, (7) soil classification of embankment, (8) era of dam construction, (9) rehabilitated history, (10) damaged history, (11) topography, (12) surface geology of dam site, (13) soil property of dam site, (14) geological age, (15) distance to epicenter and (16) acceleration at dam site. The case study through the Geiyo Earthquake in 2001 in which the objective area is Ehime Prefecture is conducted and availability of the system is evaluated.

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