repeat pulls中文什么意思

例句与用法

1. Then we also study the effect of string on the dynamical characteristic under the symmetric load and not under the symmetric load as the prestressing is the key making beam string structure the balanceatie system , having large rigidity and embodying the superiority of dynamical characteristic of this structure , this paper studies and conceives how to deteimine the number of the prestressing in each stage of construction and through comparing between the plan of onetime and repeated pulling construction choose the suitable pulling construction plan
   并且本文还研究了在对称荷载和不对称荷载两种工况下，结构的受力性能随竖向撑杆数目、结构垂跨比以及下弦索预应力等参数改变时的变化情况，总结出该结构受力方面的特征，为实际工程设计提供依据。鉴于预应力是使张弦梁结构形成自平衡体系、具备较大刚度和体现结构性能优势的关键，本文研究和探讨了结构施工各阶段该预应力大小的确定方法，通过一次张拉与二次张拉方案各项指标的比较，选择适当的预应力张拉施工方案。