疑似ひずみ硬化性引張挙動を有する短繊維補強セメント複合材料の設計ガイドライン : その2 飽和複数ひび割れを実現するための実際的な設計クライテリア

Abstract

High performance short fiber reinforced cementitious composites, named as engineered cementitious composite (ECC), have been realized with reaching several percent of tensile strain capacity. The scope of this study is to establish practical design guidelines for ECC based on micromechanics. These guidelines were set in terms of newly proposed performance indices, stress index and energy index. Uniaxial tensile test data adopting five different ECCs showed these indices successfully express saturation degree of multiple cracking, which enable us to predict the tensile strain capacity of ECCs. As a result, one can design ECC so as to achieve fully saturated multiple cracking and high strain capacity by controlling the performance indices.