STUDY ON CONSTITUTIVE MODEL CONSIDEREING HARDENING PROCESS AND LOADING HISTORY FOR EARLY AGE CONCRETE

Minoru Kunieda; Worapong Srisoros; Yutaka KISHIYAMA; Hikaru Nakamura; Yasuaki Ishikawa

doi:10.2208/jsceje.63.127

Abstract

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若材齢コンクリートの硬化過程と載荷履歴を考慮できる構成則の妥当性の検証を目的とし,試験材齢および荷重履歴の異なる条件下にて曲げ載荷試験を実施した.まず,材料特性の経時変化から作成したボリュームファンクションを用いて,バイリニア型の引張軟化曲線の形状を設定する方法を提案し,その妥当性を検証した.次に,試験材齢および載荷履歴を組み合わせた曲げ載荷試験結果において,損傷度や載荷履歴の違いによらず,無損傷の供試体と同程度以上のエネルギー量(エネルギー等価面積)が得られることを確認した.最後に,ボリュームファンクションを用いて設定された各時間ステップでの応力-ひずみ曲線を重ね合わせる手法に関して解析的に検証し,実験による荷重-CMOD曲線を概ね再現することができることを確認した.

STUDY ON CONSTITUTIVE MODEL CONSIDEREING HARDENING PROCESS AND LOADING HISTORY FOR EARLY AGE CONCRETE

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