钢筋混凝土板柱体系的承载力计算

集中力作用下钢筋砼板的承载力取决于板的抗弯强度与冲切强度。本文通过分析弯曲破坏与冲切破坏的机理及其相互影响，得到了：当ｕｆ_ｙ等于（ｕｆ_ｙ）￣０时，弯曲破坏与冲切破坏将同时发生；当ｕｆ_ｙ小于（ｕｆ_ｙ）０时，板的承载力取决于抗弯强度，增大配筋率能提高板的承载力。当ｕｆ_ｙ大于（ｕｆ_ｙ）０时，板的承载力取决于冲切强度，尽管配筋率小于ｕ_ｍａｘ，但配筋率的增大对板的承载力没有影响或影响不大。本文以表格形式提出了钢筋砼板承载力的耦合计算法，其特点是进行一次计算能同时满足抗弯强度与冲切强度的要求，为工程设计人员提供一种较简便的设计方法。

The Carrying Capacity of Reinforced Concrete Slabs under Concentrated Load

The carrying capacity of a reinforced concrete slab under concentrated load depends on its bending strength and punching strength.By analysing the failure mechanism of bend and punch, it has been obtained that when(uf_y) is equal to (uf_y)0,bending failure and punching failure will occur simultaneously.When(uf_y) is smaller than (uf_y)0,the carrying capacity will depend on bending strength only,and the carrying capacity will increase with the increase in the ratio of reinforcement.When (uf_y) is larger than(uf_y)0,the carrying capacity will depend on punching strength only.Although the ratio of reinforcement is smaller than u_(max),its increment has little influence on the carrying capacity.A calculating method of carrying capacity of slabs is presented.The bending and punching strength are acquired simultaneously by this calculating method which provides a simple designing method for the designer.