AbstractTraditionally, the yield displacement of a nonlinear structure was calculated by using the direct displacement-based seismic design method which usually requires a repeatedly iterative procedure no matter whether the substitute structure or inelastic design spectra has been adopted in the procedure. This will sometimes result in inefficiency if too many iterative cycles need to be produced in a design case for convergency. To avoid this disadvantage, this paper presents a non-iterative direct displacement-based design procedure for SDOF steel columns using the substitute structure approach. By combining the yielding property with the stiffness property of the designed steel columns, the procedure can immediately obtain the column's cross-section via the chosen target displacement and ductility ratio.
Abstract 传统上,非线性结构的屈服位移是通过直接基于位移的抗震设计方法来计算的,这种方法通常需要反复的迭代程序,无论程序中是否采用了替代结构或非弹性设计谱。如果在一个设计案例中需要产生过多的迭代循环以达到收敛,这有时会导致效率低下。为避免这一弊端,本文提出了一种使用替代结构方法的基于位移的 SDOF 钢柱非迭代直接设计程序。通过将屈服特性与设计钢柱的刚度特性相结合,该程序可以通过所选的目标位移和延性比立即获得钢柱的截面。