板式结构体系的箱形平板薄壳单元

A New Box-Type Plate and Shell Element Used in Panel Structures

为简化板壳结构的计算,根据板式住宅墙板的受力和变形特点,提出一种新型的箱形平板薄壳单元。这种单元在平面弹性变形和板弯曲相似的基础上,将平面弹性单元转化为板弯曲单元。在计算的过程中板的弯扭内力和拉压内力单独计算,然后进行叠加,形成一种广义位移协调单元。数值算例验证表明:这种单元能通过分片验证,并且具有等参元的性质,与弹性单元相比具有基本相同的精度。在模拟板式住宅体系时具有剖分简单、计算效率高的特点。

Based on distortion characteristics of panel structure under load action,a new thin-wall box-type plate and shell element are put forward.As the similarity between plane elastic deformation of this element and bending deformation of a plate,the plane elastic unit is changed into the plate bending unit.The crankle stress and draw-press stress are calculated,respectively,and summed to construct a generalized displacement unit.Numerical computation shows that the element can pass patch test,has the characteristics of equal parameter element and has much the same precision with elastic plane plates.This method is simple to dissect,and has high computation efficiency.