The task consider geometry stiff matrix of suspenders due to adjustment of suspender length (the actual suspender length is shorter than its nominal length), and derive method and step of static tension of suspenders from single order variation.

• 本课题还考虑了由于吊索（杆）长度的调整（实际的吊索（杆）长度比名义长度短）而引入的吊索（杆）系的几何刚度矩阵（初应力刚度矩阵）。 并用一阶摄动理论导出了吊索（杆）系静张力的计算方法与步骤。