基于三阶折线位移模型，利用虚功原理导出了含初始平面应力的层合复合材料板的弯曲理论。
Based on the third order zigzag displacement model, a bending theory for laminated composite plates in an initially stressed state is derived by use of the principle of virtual work.
利用虚功原理和变分原理分别推导了T形、L形和一字形截面的短肢剪力墙空间单元刚度矩阵。
Space stiffness matrix of T-shape, L-shape and -shape short-leg shear wall is derived by virtual work principle and variational principle.
利用虚功原理，建立了单面粘贴有压电致动器的梁结构的拉伸-弯曲耦合模型，在分析过程中，考虑了梁与致动器之间粘贴层的影响。
In this paper, the tension bending coupling model is presented by virtual work principle, the effect of the bonding layer between beam and piezoelectric actuator is considered in the analysis.
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