大跨度空间密肋楼盖设计计算的拟板解法

The PseudoPlate Method for the Design of Large Span Rib Floor

密肋楼盖是实现建筑大跨度空间的一种重要的结构形式。由于密肋楼盖是高次超静定结构，特别是连续跨双向密肋楼板的设计计算非常复杂，故目前一般只能通过计算机用数值方法计算。但由于密肋楼盖是空间三维结构，即使采用计算机仍有计算工作量大、费用高等缺点，尤其对于概念设计或初步设计阶段显得过于复杂。本文将双向密肋楼盖按刚度等效成正交各向异性板，用板的计算公式可方便地得出肋梁中的内力和密肋板的挠度，与工程上采用的有限单元法结果相比，具有较高的精度，有一定的实用价值。

The rib floor is an important structure in large span buildingsBut it is a high degree statically indeterminate structureEspecially,it is very complex in the case of continuous twoway rib floorSo at present only the computer can deal with it by means of the numerical methodSince the calculating procedure is very complex,it is not suitable especially for concept design and elementary designIn this paper,the rib floor is assumed to be orthotropic flat plate by pseudoplate methodSo the internal forces and the deflections of rib floor could be obtained with easeThis method has enough accuracy compared with the finite element method,hence the pseudoplate method is valuable in practice