摘录
The General Link element is used to model dampers, base isolators, compression-only element,tension-only element, plastic hinges, soil springs, etc. The 6 springs individually represent 1 axial deformation spring, 2 shear deformation springs, 1 torsional deformation spring and 2 bending deformation springs as per Figure 1.1. Among the 6 springs, only selective springs may be partially used, and linear and nonlinear properties can be assigned. The general link can be thus used as linear and nonlinear elements.