CAJ | 학술논문

混凝土保护层的厚度会直接影响构件的破坏形态、承载力、刚度以及耐久性能等．结合型钢高强混凝土柱的剪切黏结破坏特征，以混凝土保护层为对象，根据板弹塑性稳定理论和力扩散原理分别对其受压屈曲失稳和临界开裂时的最小保护层厚度进行理论推导，提出合理的计算公式，计算结果与已有试验结果相吻合．结合工程实际，混凝土保护层厚度还应满足我国现行《混凝土结构设计规范》(GB 50010-2010)中最小保护层厚度的构造要求，并建议型钢高强混凝土构件的最小配箍率宜取0.3%．
혼응토보호층적후도회직접영향구건적파배형태、승재력、강도이급내구성능등．결합형강고강혼응토주적전절점결파배특정，이혼응토보호층위대상，근거판탄소성은정이론화력확산원리분별대기수압굴곡실은화림계개렬시적최소보호층후도진행이론추도，제출합리적계산공식，계산결과여이유시험결과상문합．결합공정실제，혼응토보호층후도환응만족아국현행《혼응토결구설계규범》(GB 50010-2010)중최소보호층후도적구조요구，병건의형강고강혼응토구건적최소배고솔의취0.3%．
Thickness of the concrete cover has direct impact on the failure pattern, bearing capacity, rigidity and durability of the concrete members. Shear bond failure of steel reinforced high-strength concrete columns is analyzed in this paper. The concrete cover thickness calculation formulas of concrete compressive buckling and critical cracking are derived by using plate elastic-plastic theory and force diffusion principle. The calculated result of concrete cover thickness agrees with the test result. In application, the concrete cover thickness should meet the structural requirement of minimum concrete cover thickness in accordance with Code for Design of Concrete Structures of China. Besides, it is suggested that the stirrup ratio of steel reinforced high-strength concrete members be greater than or equal to 0.3%.