计算四边支承圆管式空心楼板的两种简化方法

Two simplified ways of calculation of circular-pipe-cavity slab supported by four sides

采用ANSYS有限元软件分析几种不同规格的空心板,阐述空心板是正交各向异性(等效刚度)板。采用两种简化方法求解四边支承圆管空心板,一种方法求解出正交各向异性板单元的刚度矩阵中各项参数,采用有限元对空心板进行分析;另一种方法采用SAP2000软件依据两方向刚度相等原则将空心板等效成井字梁分析,从而求出两方向梁的内力。两种方法均具有较高精度,并列举实例说明。

Voided Slabs is illuminated orthotropie （ equivalent flexural rigidity） ones, based on several specs of circular slab by means of analyzing soft ANSYS. We can solve them by two simplified ways. One way is that all items of parameters of dement stiffness matrix in orthotropic slab are solved,it is analyzed by FEA. The other way is that voided slabs are equivalent to intersecting-parallel girders in terms of principles of equality of rigidity in two directions,internal forces of which are solved by soft SAlt2000. Methods of the two have high accuracy with an example for demonstrating.