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本文简述了由于各次地震的特性不同、测震台站的地质地理特性不同，而引起根 据不同台站对不同地震的实测地面运动得到的地震反应谱，存在着严重的离散性，鉴 于上述事实，文中建议了最大可能地震反应谱值的简易估算方法，可用来方便地估计 任一场地可能出现的最大反应谱值，以代替统一规定的设计反应谱；文中还诱导了反 应谱值的期望和方差的表达式，分析了反应谱值离散的原因。
This paper briefly describes the severe dispersion of the seismic response spectra resulting from measured ground motions of different stations for different earthquakes due to the different characteristics of the earthquakes and the different geological and geographical characteristics of the seismometric stations. In fact, the paper proposes a simple method for estimating the maximum possible seismic response spectrum value, which can be used to easily estimate the maximum response spectrum value that may occur at any site instead of the uniform design response spectrum; the expectation of the response spectrum value is also induced in the text. The expressions of variance and variance analyze the reasons for the discretization of the response spectrum.