2次元粒子モデルを用いたコンクリートの破壊解析に関する基礎的研究

概要

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Two-dimensional analysis model; so-called "Particle model", which takes multi-phase structure including mortar, aggregates and interfaces into consideration, is presented to simulate cracking behavior in concrete. First, 3-point bend test on concrete and mortar beam specimens with notches were conducted to investigate the effect of material ages and aggregates on fracture behaviors of the specimens. Then, material parameters characterizing microscopic mechanical properties of each phase were identified using results of the fracture test. However, since mechanical properties of the interface have not been clearly understood so far, parameters related to the interfaces were evaluated on the basis of the degree of hydration in the interface calculated by the analysis of hydration reaction. Finally, the fracture analysis on the concrete specimens was conducted using the identified microscopic material parameters. The results indicate that the particle model and the associated parameter identification method are useful, but there is a limitation of the 2-dimensional particle model.
社団法人日本建築学会の論文
2003-09-30