...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Seismic microzonation of the greater Bangkok area using microtremor observations
【24h】

Seismic microzonation of the greater Bangkok area using microtremor observations

机译：曼谷大地震地区的微震观测

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Bangkok, the capital city of Thailand, is located at a remote distance from seismic sources. However, it has a substantial risk from these distant earthquakes due to the ability of the underlying soft clay to amplify ground motions. It is therefore imperative to conduct a detailed seismic hazard assessment of the area. Seismic microzonation of big cities, like Bangkok, provides a basis for site-specific hazard analysis, which can assist in systematic earthquake mitigation programs. In this study, a seismic microzonation map for the greater Bangkok area is constructed using microtremor observations. Microtremor observations were carried out at more than 150 sites in the greater Bangkok area. The predominant periods of the ground were determined from the horizontal-to-vertical (H/V) spectral ratio technique. A microzonation map was then developed for the greater Bangkok area based on the observations. Moreover, the transfer functions were calculated for the soil profile at eight sites, using the computer program SHAKE91, to validate the results from the microtremor analysis. The areas near the Gulf of Thailand, underlaid by a thick soft clay layer, were found to have long natural periods ranging from 0.8s to 1.2s. However, the areas outside the lower central plain have shorter predominant periods of less than 0.4s. The study shows that there is a great possibility of long-period ground vibration in Bangkok, especially in the areas near the Gulf of Thailand. This may have severe effects on long-period structures, such as high-rise buildings and long-span bridges.
机译：泰国首都曼谷距离地震源很远。但是，由于下面的软粘土具有放大地面运动的能力，因此在这些遥远的地震中具有很大的风险。因此，必须对该区域进行详细的地震危害评估。大城市（如曼谷）的地震微区划为特定地点的危害分析提供了基础，这可以帮助系统地进行减震计划。在这项研究中，使用微震观测结果绘制了曼谷较大地区的地震微区划图。在较大的曼谷地区的150多个地点进行了微震观测。地面的主要​​时段由水平/垂直（H / V）光谱比技术确定。然后，根据观测结果为更大的曼谷地区开发了一个微区地图。此外，使用计算机程序SHAKE91计算了八个位置土壤剖面的传递函数，以验证微震分析的结果。泰国湾附近的地区被厚厚的软粘土层所覆盖，发现其自然周期长，范围从0.8s到1.2s。但是，中下部平原以外的区域的主周期短于0.4s。研究表明，曼谷，特别是在泰国湾附近的地区，很可能发生长时间的地面振动。这可能会对诸如高层建筑和大跨度桥梁之类的长期结构产生严重影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号