对一后张拉预应力成形鞍形网壳模型的成形应力进行了非线性有限元计算。建模时,使用连接件模拟了上弦杆搭接螺栓连接以及腹杆的鸭嘴端螺栓连接,考虑了几何非线性和材料非线性,将“管-管”接触算法应用于梁、杆单元组成的结构模型中。结果表明:计算值与试验值在杆件应力及内力分布趋势上吻合,但计算值小于试验值,其主要原因是有限元模型未考虑到实际张拉过程中,主对角线下弦杆加入到了结构体系。 The forming stress of a post-tension pre-stressed saddle-shaped reticulated shell model was calculated by nonlinear finite element method. In modeling, the connecting rod was used to simulate the captive bolt connection of the winding rod and the duckbill bolt connection of the web. Considering the geometric nonlinearity and material nonlinearity, the “tube-tube” contact algorithm was applied to the beam and the rod Cell structure model. The results show that the calculated values ​​coincide with the experimental values ​​on the trend of the bar stress and internal force distribution, but the calculated value is less than the test value. The main reason is that the finite element model does not consider the actual diagonal chord added to Structural system.