A modification of the softened strut-and-tie model is required to simulate the bridge column-footing joints due to the different force mechanism at the joints.

• 桥柱桩基础亦属不连续区域，但因基础版相对于接头有一扩大断面，使其受力机制与上述之不连续杆件有所不同，故软化压拉杆模型之参数定义也必须因应调整。