Analysis of ground motions at Treasure Island site during the 1989 Loma Prieta earthquake
Analysis of ground motions at Treasure Island site during the 1989 Loma Prieta earthquake
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1989 年洛马普列塔地震期间金银岛遗址的地面运动分析
DOI：
10.1016/0267-7261(93)90001-8
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发表时间：
1993
影响因子：
4
通讯作者：
Guoxi Wu
中科院分区：
文献类型：
--
作者：
W. Finn;C. Ventura;Guoxi Wu
现场反应分析和一致性研究在金银岛现场进行，在洛马普里塔地震期间记录了地表运动。分析采用非线性动态有效应力法进行，考虑了现场发生的液化的影响。在Yerba Buena岛附近记录的岩石运动被用作输入运动。计算和记录的沿波传播方向的横向地震动及其相关的响应谱符合得很好。除了高于1.25 Hz的某些频段外，径向一致性也很好。相干性研究表明，其中一些差异可能是由于金银岛和Yerba Buena运动在相同频段内的低相干性。
Site response analyses and coherence studies were conducted at the Treasure Island site where surface motions were recorded during the Loma Prieta earthquake. The analyses were conducted using a nonlinear dynamic effective stress method which took into account the effects of the liquefaction that occured at the site. The rock motions recorded at nearby Yerba Buena Island were used as input motions. Computed and recorded ground motions transverse to the direction of wave propagation and associated response spectra were in good agreement. Agreement was also good in the radial direction, except in certain frequency bands higher than 1·25 Hz. Coherence studies showed that some of these discrepancies may be due to low coherence between the Treasure Island and Yerba Buena motions in these same frequency bands.