구속 조건이 콘크리트 응력-변형률 관계에 미치는 영향
Effect of confinement conditions on the stress-strain relations of concrete
콘크리트 응력변형률 Mander이론;
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The confined concrete subjected multi-axial stresses have been known as the strength of concrete increases significantly. Many researchers have studied in confining effects of concrete, and now are studying in many fields. However, there are few passive confinements by steel tube. Although Mander et al. studied the concrete confined by transverse reinforcements, the confinement by steel tube differ from confining of reinforcements. To investigate the influence of concrete strength increased by various confining conditions in steel, 51 specimens confined by different shapes and thicknesses of steel tube were tested and compared.