Geotechnical Engineering Aspects of the June 1999 Central Mexico Earthquakes
Geotechnical Engineering Aspects of the June 1999 Central Mexico Earthquakes
复制标题
1999 年 6 月墨西哥中部地震的岩土工程问题
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
R. Seed
中科院分区：
文献类型：
--
作者：
J. Pestana;R. Sancio;J. Bray;M. Romo;M. Mendoza;R. Moss;J. Mayoral;R. Seed
1999年6月15日，墨西哥中部地区普埃布拉州和瓦哈卡州之间发生了一次矩级7.0级地震。6月21日发生的第二次风暴矩震级为6.3级，也影响了墨西哥中部地区，但后果轻微。将6月15日地震的峰值地面加速度与震源距离的衰减关系与各种地质场地条件下的强震记录进行了比较。观察到显着的网站放大，并与深层土壤条件。6月15日的事件对教堂和房屋等未加固的砖石结构造成了重大破坏，其中包括500多座历史建筑。普埃布拉市以及特瓦坎和阿卡特兰德奥索里奥镇是受地震影响最严重的城市地区。虽然墨西哥城也有震感，但破坏程度很轻，主要限于非建筑物。与1985年9月地震期间获得的观测结果比较表明，显着的土壤非线性，在较大的时期内放大，可以观察到软土场地。
An earthquake of moment magnitude (Mw) 7.0 struck the central region of Mexico on 15 June 1999 between the states of Puebla and Oaxaca. A second event with a moment magnitude 6.3 occurred on June 21, also affecting the central region of Mexico but with minor consequences. Attenuation relationships of peak ground acceleration with hypocentral distance for the June 15th event were compared with strong-motion recordings over a variety of geologic site conditions. Significant site amplification was observed and was correlated with deep soil conditions. The June 15th event caused significant damage of unreinforced masonry structures, such as churches and houses, including more than 500 historical buildings. Puebla City and the towns of Tehuacán and Acatlán de Osorio were the urban areas hardest hit by the earthquake. Although the earthquake was felt in Mexico City, the damage was light and mostly restricted to nonstructural elements. Comparison with observations obtained during the September 1985 earthquake suggest that significant soil nonlinearity, resulting in increased amplification at larger periods, can be observed for soft soil sites.