A semi-empirical method using a hybrid of stochastic and deterministic fault models: simulation of strong ground motions during large earthquakes
A semi-empirical method using a hybrid of stochastic and deterministic fault models: simulation of strong ground motions during large earthquakes
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使用随机和确定性断层模型混合的半经验方法：大地震期间强地面运动的模拟
DOI：
10.4294/jpe1952.36.89
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
T. Ikeura
中科院分区：
文献类型：
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作者：
M. Takemura;T. Ikeura
提出了一种新的半经验方法来估计强震地面运动，该方法在预测大地震期间的强震地面运动时考虑了断层面的不规则性。根据这种方法，将大地震断层面上的位移分为两部分。一个是断层面上的平均位移Do，另一个是与Do的偏差Δ Dij。利用小单元地震的观测地震图，分别合成了由Do引起的地震辐射SL（t）和由Dj、Dij引起的地震辐射SS（t）。引入参数SD，用单元地震位移除以Δ Dij的标准差，表示断层面上位移的不均匀程度。新方法被应用于合成的强地面运动在18个台站在8个大地震的震级为6.7至7.9发生在日本和周围。当SD取1.0左右时，除软土地基上的观测记录外，合成记录与实测记录吻合较好。这些结果表明，新方法的适用性，预测强地面运动的相对刚性的地面，不表现出非线性行为在强地面震动。
A new semi-empirical method is developed to estimate strong ground motions, which takes into account fault plane irregularities in the prediction of strong ground motions during large earthquakes. According to this method, the displacement on the fault plane of a large earthquake is divided into two parts. One is the average displacement Do over the fault plane and the other is the deviation ĢDij from Do. The seismic radiation SL(t) due to Do and the seismic radiation SS(t) due to ĢDij are synthesized separately using the observed seismograms for a small element earthquake. A parameter SD is introduced as the standard deviation of ĢDij divided by the displacement of the element earthquake, which shows the degree of inhomogeneity of displacement on the fault plane. The new method is applied to synthesis of strong ground motions at 18 stations during 8 large earthquakes with magnitude M of 6.7 to 7.9 occurring in and around Japan. The synthesized records are in good agreement with the observed ones except for the records obtained at the stations on soft soil deposits, if SD is chosen to be about 1.0. These results indicate the applicability of the new method for predicting strong ground motions on relatively stiff ground which does not show non-linear behavior during strong ground shaking.
DOI：
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发表时间：
1975-10
期刊：
--
影响因子：
--
作者：
H. Kanamori;D. L. Anderson
通讯作者：
H. Kanamori;D. L. Anderson