摘要
本文研究了钢筋混凝土板的冲切破坏机理。试验中采用了较先进的混凝土内部测试元件,对冲切破坏斜面上混凝土变形进行了量测。总结出破坏斜面上混凝土应变分布及裂缝的形成和发展规律;对比了普通混凝土与浮石轻骨料混凝土板冲切破坏的异同;建立了半经验-半理论冲切承载力计算公式。
The paper studies the punch-shear damage mechanism of reinforced concrete slabs. The advanced measuring component used inside the concrete is adopted in experiment, and the concrete deformation along the inclined punch-shear damage surface is measured. The concrete strain distribution, the crack formation and its development rule on the damage surface are summarized.The similarity and difference between the normal concrete and the pumic lightweight aggregate concrete slabs about the punch-shear damage are compared. Finally, the semiexperimental, semitheoretical calculation formula of punch-shear bearing capacity is estaiblished.
关键词
钢筋混凝土
板
冲切
承载力
机理
reinforced concrete structure
mechanism of deteriortion
punch-shear
