求解性态点处位移的数值解法

Numerical solution of displacement on performance point

由Push-over分析法可以得到结构的能力曲线,若想得到相应于性态点(Performance Point)处的结构位移则需要通过能力谱方法(Capacity Spectra Method)才能得到,而目前的能力谱方法均为图形方法,而且多数需通过迭代才能完成。本文在对能力谱方法分析的基础上,提出一种无需迭代即可求解性态点处位移的数值方法。用该方法求出4种框架结构在性态点处的位移值,并将所求出的位移值与用Chopra能力谱法求出的位移值进行了比较。比较结果说明用本文所提方法求解性态点处的位移值不但正确而且方法简单。

Capacity curves could be got from push-over analysis, however the structural displacements on performance points must be got from capacity spectra method. The current capacity spectra methods were graphical and iterative methods. This A numerical method was presented for getting the displacement on performance points without any iteration. Displacements of four RC flame structures on performance points obtained respectively from the numeric method and Chopra capacity spectrum method were compared. The results indicate that the numeric method is not only accurate but also simple.