The concept of the structural performance safety index is put forward and its calculation method is derived based on the structural deformation limit state equation.
The calculation method for freedom length of the anchor bar is improved, and the calculation formulae of structural foundation embedded depth and stability limit equilibrium analyses were derived.
改进了锚杆自由段长度的计算方法，推导了结构的基础埋深和稳定性极限平衡分析的计算公式。
3
Taking three-axle vehicle as an example, the calculation formula of parking grade limit of multi-axle vehicle is derived with its influencing factors analyzed.