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공시체의 크기와 형상이 콘크리트의 축압축강도에 미치는 영향
양은익,최중철,이성태 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-
The compressive strength of concrete is used as a material property when concrete structures are designed. It has been problem to evaluate this value, however, because the control specimen sizes and shapes are different from every country. In this study, the effect of specimen sizes and shapes on axial compressive strength of concrete members was experimentally investigated based on fracture mechanics. Experiments for the mode I failure was carried out by using cylinder, cube, and prism specimens. The test results are curve fitted using least square method (LSM) to obtain the new parameters for the modified size effect law (MSEL). The analysis results show that the effect of specimen size on ultimate strength was apparent. The results show a much stronger size effect in member when the casting direction is different to loading direction.