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首页> 外文期刊>Seismological Research Letters >Site-Response Spectra for POLARIS Station Sites in Southern Ontario and Quebec
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Site-Response Spectra for POLARIS Station Sites in Southern Ontario and Quebec

机译：安大略省南部和魁北克POLARIS站点的站点响应光谱

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Local geologic and soil conditions can greatly increase the intensity of earthquake ground shaking (Kramer 1996). These local site effects are particularly significant at sites with deep, soft soil deposits, although hard rock sites may also exhibit amplification (Siddiqqi and Atkinson 2002). Estimation of this localized site response can be accomplished using theoretical or empirical methods. Theoretical modeling requires extensive characterization of a site's near-surface geology, as well as the use of sophisticated computing methods. In contrast, empirical approaches require only ground-motion data records from the site. The relative ease of application has popularized the use of empirical methods in investigating site response. nnGround-motion records have become readily available at a number of Canadian sites, owing to the recent deployment and subsequent expansion of the Portable Observatories for Lithospheric Analysis and Research Investigating Seismicity (POLARIS) seismograph network (Eaton et al. 2005). In this study, empirical site-response spectra were produced for 11 stations of the POLARIS Ontario (POLO) array of POLARIS (Figure 1 and Table 1). A variety of near-surface conditions exist at these sites. While most are located on competent Precambrian bedrock, others rest on fractured Paleozoic bedrock, soil, or a combination of soil and manmade fill. An additional, temporary, soil station was also studied (Figure 1 and Table 1). Installed near a cement quarry in St. Marys, Ontario, this station collected data over a weeklong period.
机译：当地的地质和土壤条件可以大大增加地震地面震动的强度（Kramer 1996）。这些局部站点效应在具有深层，软土沉积的站点上尤其显着，尽管硬岩站点也可能表现出放大作用（Siddiqqi and Atkinson 2002）。可以使用理论或经验方法来估计该局部部位反应。理论建模需要对站点的近地表地质进行广泛的表征，并需要使用复杂的计算方法。相比之下，经验方法仅需要站点的地面运动数据记录。相对容易应用已经广泛使用了经验方法来调查站点响应。由于最近部署并随后扩展了岩石圈分析和研究地震便携式天文台（POLARIS）地震仪网络（Eaton等，2005），nn地震动记录已在加拿大的许多地点获得。在这项研究中，对POLARIS的POLARIS Ontario（POLO）阵列的11个站点产生了经验性的站点响应光谱（图1和表1）。这些地点存在各种近地表条件。尽管大多数位于有能力的前寒武纪基岩上，但其他则位于断裂的古生代基岩，土壤或土壤与人工填充物的组合上。还研究了一个额外的临时土壤站（图1和表1）。该站安装在安大略省圣玛丽的一个水泥采石场附近，在一周的时间内收集了数据。

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