On the Use of Elastic Input Energy for Seismic Hazard Analysis
On the Use of Elastic Input Energy for Seismic Hazard Analysis
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DOI：
10.1193/1.1586064
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发表时间：
1999-11
影响因子：
5
通讯作者：
M. Chapman
中科院分区：
文献类型：
--
作者：
M. Chapman
基于弹性输入能量的概率地震危险性计算的分解可能被证明是有用的识别场景事件，因为输入能量是一个方便的运动持续时间和幅度的单参数描述符。为了研究该应用，推导出频率范围为0.5至10 Hz的绝对输入能量等效速度V ea和弹性伪相对速度响应PSV的回归模型。分解的一般地震危险性模型，使用VEA表明，模态振幅为较高的频率振荡器往往是更大的，和变化较小的振荡器频率，比那些使用PSV。如果使用Vea，则震级较大的地震对地震危险性的贡献更大。Vea和PSV对场地分类的依赖性几乎是相同的，并且Vea可以作为震级、距离和场地分类的函数以稍微小的不确定性来预测。
The disaggregation of probabilistic seismic hazard calculations based on elastic input energy may prove useful for the identification of scenario events because input energy is a convenient single-parameter descriptor of motion duration and amplitude. To investigate this application, regression models are derived for the absolute input energy equivalent velocity, V ea , and the elastic pseudo-relative velocity response, PSV, in the frequency range 0.5 to 10 Hz. Disaggregation of a general seismic hazard model using V ea indicates that the modal magnitudes for the higher frequency oscillators tend to be larger, and vary less with oscillator frequency, than those derived using PSV. Larger magnitude earthquakes contribute more to seismic hazard if V ea is used. The dependence of V ea and PSV upon site classification is virtually identical, and V ea can be predicted with slightly less uncertainty as a function of magnitude, distance and site classification.