拟合我国对《建筑结构抗震规范》进行了修订，将设计反应谱周期由原来的3秒延长到现在的6秒。反应谱周期的延长利用三角级数法迭加来模拟地震动-Fitting China s　anti-seismic construction norms,　and the amendment to the design response spectrum cycle from three seconds to extend to the present six seconds. Response spectrum of the extended-cycle use of trigonometric series superposition method to simulate ground motion