【摘要】 场地卓越周期的确定对建筑在其上的各类建筑物和构筑物的抗震设计是至关重要的.实际震害表明:当结构物的自振周期与场地的卓越周期接近时,所导致的结构共振作用是结构震害的主要原因.场地卓越周期的分析计算方法很多,通过对地脉动的谱分析可以得到较为准确的场地卓越周期,然而实现快速的傅式变换计算程序是比较繁琐的,利用MATLAB的波谱分析工具可以方便地实现快速傅式变换,从而有效、快速地得到场地的卓越周期以供工程使用.更多还原

【Abstract】 The determination of predominant period of site is very important to the earthquake-resistance designs of many kinds of buildings and structures on the site.The actual earthquake disaster shows that the role of structural sympathetic vibration is the main reason for the disaster when the natural vibration period of structure is close to the predominant period of site.There are many ways to analyse and calculate the predominant period, and the comparatively accurate period can be got by the spectral analysis of microtremor.It is complicated to achieve the calculation procedure of Fast Fourier Transform(FFT),but it is convenient to realize the transform by the spectral analysis tool of MATLAB.Thus,the predominant period is effectively and rapidly got to supply it for the engineering.更多还原