多質点系モデルを用いた振動破損実験におけるエネルギーの振る舞い

Behavior of the energy of vibration failure experiment by using a 2-mass system model

関 一*; 藤田 聡*; 皆川 佳祐*; 北村 誠司 ; 渡壁 智祥

Seki, Hajime*; Fujita, Satoshi*; Minagawa, Keisuke*; Kitamura, Seiji; Watakabe, Tomoyoshi

本研究では、現行耐震評価手法の合理化を目的として、構造物に蓄積されるエネルギーに着目した振動挙動の検討を進めてきた。本報では、構造物に蓄積されるエネルギーに着目し、2質点系モデルの振動実験を行い、総エネルギー入力と破損の相関関係について確認した。

When we study the behavior of the pipes during an earthquake, the most important damage doesn't come from the maximal load by itself, but from the accumulation of the fatigue damage caused by the repetition of the cyclic load. Therefore, from the point of view of seismic design evaluation methods, techniques that can quantitatively assess the probability of fatigue failure of mechanical structures are needed. The relationship between failure and energy is evaluated, and examined by focusing on the Energy Balance Method said to be effective as an earthquake response analysis technique in the present. This study carries out failure experiments using 2-mass system model based on Energy Balance Method. Furthermore, we focus on the strain from the vicinity of broken point as local response.