
Elastic modulus of subgrade is an important input parameter in the multilayered elastic structural analysis of asphalt pavement, and the resilient modulus measurement of subgrade materials which assumed action of the vehicle load has been examined energetically after 1990's by laboratory testing. However, no design example using the resilient modulus is shown in the Japanese pavement design book because of the resilient modulus is a non-linear elastic modulus depending on a stress state, and structural analysis becomes complicated. In this study, by using the rearranged past data, arranging method of the resilient modulus was examined and furthermore a simple calculation method of the subgrade resilient modulus for the multilayered elasticity structural analysis was proposed. アスファルト舗装の多層弾性構造解析において,路床の弾性係数は重要な入力パラメータであり,1990年代以降には,室内実験によって輪荷重の作用を想定した路床材料のレジリエントモジュラスの測定が精力的に行われてきた.しかし,レジリエントモジュラスは応力状態に依存する非線形弾性係数であり,構造解析が複雑になるため,日本の舗装設計関連図書では設計事例が示されていないのが現状である.本研究では,既往のデータを再整理してレジリエントモジュラスの整理方法について検討するとともに,多層弾性構造解析において簡易にレジリエントモジュラスを用いる方法を提案した.
asphalt pavement, resilient modulus, generalized model, subgrade
asphalt pavement, resilient modulus, generalized model, subgrade
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