地震加速度反应谱拟合的直接法研究

本文研究地震动加速度时程的反应谱拟合方法,通过给定地震动加速度时程的三角级数表达式,从理论上推导了响应的直接计算公式,与传统的反应谱拟合方法相比,本文所给的方法无须进行功率谱转换及迭代运算即可直接生成拟合目标反应谱的地震动加速度时程,因此,具有计算量少和计算精确简便的特点,所给算例表明该方法具有较好的拟合精度。

DIRECT METHOD OF SIMULATING RESPONSE SPECTRUM OF EARTHQUAKE ACCELERATION

The method of simulating response spectrum of earthquake acceleration is studied in this paper. The direct formulas to compute responses are derived analytically by using a finite cosine series of earthquake acceleration bine history. Since the transformation from response spectrum to power spectrum and the iteration procedure of computation are avoided, the method needs less computing bine than conventional methods and is more precise and simpler. An example is given indicating that the method is very accurate.