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通过对天水市建筑场地地面脉动的观测与分析,说明地面脉动幅值受多种因素的影响,並随地形地貌的改变而变化。水平向脉动明显地有一个卓越方向,水平振动的卓越方向在整体上受场地周围的地形所约束,局部场地条件只具有次要的影响。地面脉动频谱特性一般是在大区域范围内才能反应出变化来,且受区域地质和新构造运动的情况所控制,地面脉动的特征是局部地形地貌对谱型的影响迭加在区域背景上的结果。地面脉动与强震时地面运动特征的对比及二者的相关性是今后研究场地地面运动的重要问题。按场地地面脉动的卓越周期和谱型将测区场地作了区段划分。
Through the observation and analysis of ground pulsation in the construction site of Tianshui City, it shows that the amplitude of ground pulsation is affected by many factors and changes with the change of topography. The horizontal pulsation obviously has an excellent direction. The excellent direction of horizontal vibration is bound by the topography around the site as a whole, and the local site conditions have only a minor influence. The characteristics of the ground-pulsation spectrum are generally only reflected in a large region and are controlled by regional geology and neotectonics. The characteristics of the ground-pulsation are the effects of the local topography on the spectral type superimposed on the regional background result. Ground pulsation and strong earthquakes during the movement of the characteristics of the comparison and the correlation between the two is the future study of ground movement important issues. According to the site of the pulsation of the excellent cycle and the spectrum will be divided into test site area.