板式结构体系的箱形平板薄壳单元

摘要

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 e-qual parameter element and has much the same precision with elastic plane plates. This method is simple to dissect,and has high computation efficiency.