CAJ | 학술논문

基于混凝土强度的试验资料,首先建立了合理描述混凝土强度破坏特性的Lade-Duncan破坏准则,并将该Lade-Duncan破坏准则转化为等效的Mohr-Coulomb破坏准则.依据塑性上限分析理论和合理的混凝土板冲切强度破坏模式,求出了圆形和矩形分布荷载下混凝土板冲切强度的统一表达式.通过与已发表的研究成果、试验结果和规范公式相比较,论证了本文给出的混凝土板冲切强度公式的合理性.
기우혼응토강도적시험자료,수선건립료합리묘술혼응토강도파배특성적Lade-Duncan파배준칙,병장해Lade-Duncan파배준칙전화위등효적Mohr-Coulomb파배준칙.의거소성상한분석이론화합리적혼응토판충절강도파배모식,구출료원형화구형분포하재하혼응토판충절강도적통일표체식.통과여이발표적연구성과、시험결과화규범공식상비교,론증료본문급출적혼응토판충절강도공식적합이성.
Based on concrete testing data of failure strength, a suitable Lade-Duncan failure criterion is proposed. Then the corresponding Mohr-Coulomb failure criterion with equivalent internal friction angle is obtained. According to the upper-bound plasticity theory and the proposed punching failure modes of concrete slab, a unified punching strength formula under circle and rectangular pressure is presented and verified systematically by the corresponding concrete slab punching theory, testing data published in the literatures and concerning concrete slab punching formula recommended by China Code.