噴石を受ける半円形屋根型シェルターの衝撃変形に対するひずみ速度効果の検討

鋼製火山避難シェルターの衝撃変位量の評価と分析

抄録

Japan is one of the most volcanic countries in the world, and ensuring the safety of structures against disasters such as volcanic cinder impact is an important issue. Therefore, the safety of evacuation shelters and other structures against volcanic cinder impacts is being verified.Analytical studies on the phenomenon of volcanic cinder impact have been conducted using the finite element method and the difference method. However, the finite element method and difference method use differential quantities in space, which may lead to calculation failures.

In this study, a numerical analysis of a steel evacuation shelter subjected to volcanic cinder impact is attempted using Peridigm, a fracture analysis system based on the Peridynamics theory, which discretizes the integral equation without using the differential quantity of space. Strain-rate effects are taken into account in the analysis, and the application of strain-rate effects is also analyzed.