• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Arabian journal of geosciences >Site response assessment and ground conditions at King Saud University Campus, Riyadh City, Saudi Arabia
【24h】

Site response assessment and ground conditions at King Saud University Campus, Riyadh City, Saudi Arabia

机译：沙特阿拉伯利雅德市国王沙特大学校区的网站响应评估与地面条件

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

Site response characteristics have a significant influence on ground motion vibrations. To evaluate the site response effects at King Saud University campus, the horizontal-to-vertical spectral ratio (HVSR) technique has been applied at 45 sites with about 400-m spacing. The recording time was more than 1 h at each site with a sampling rate of 100 Hz. The data were processed and analyzed using Geopsy software to produce measurements of fundamental frequency and minimum site amplification factor. Moreover, shear-wave velocity down to 30-m depth has been acquired at 10 measuring sites in the campus. In addition, geotechnical borehole data were collected from four boreholes within the campus. Generally, in majority of sites the H/V curve for amplitude spectra displayed a clear peak, signifying the presence of a sharp soil-bedrock impedance contrast between alluvial deposits and underlying bedrock. It is indicated that the fundamental frequency ranges between 0.64 and 1.94 Hz. Given the measured resonance frequency of around 1 Hz, buildings located on the alluvium that have 5 stories in height could experience soil-structure resonance, while the amplification factor varies from 1.19 to 11.22 indicating localized zones having high vulnerability index due to the considerable thickness of alluvial deposits. Moreover, shear-wave velocity ranges between 320 m/s and 684 m/s revealing zones of stiff soil to very dense soil/or soft rock which is correlated well with the geotechnical parameters of borehole data. Based on these results, the ground conditions of near-surface sediments in the King Saud University campus indicate weak zones that led to ground subsidence resulting in differential settlements of foundations.
机译：站点响应特征对地面运动振动具有显着影响。为了评估在沙特大学校园国王的网站反应效果，横向垂直光谱比（HVSR）技术已在45个位点应用，具有约400米间距。每个站点的记录时间超过1小时，采样率为100 Hz。使用Geopsy软件处理和分析数据，以产生基本频率和最小现场扩增因子的测量。此外，在校园中的10个测量部位获得了下降至30米深度的剪切波速度。此外，从校园内的四个钻孔收集地岩石钻孔数据。通常，在大多数网站中，幅度光谱的H / V曲线显示出清晰的峰，这表示存在剧烈的土壤 - 基岩阻抗在冲积沉积物和底层基岩之间的存在对比。结果表明，基本频率范围在0.64和1.94 Hz之间。鉴于测量的共振频率约为1 Hz，位于高度5个故事的加容量上的建筑物可能会经历土壤结构共振，而放大因子因指示由于相当大的厚度而指示具有高漏洞指数的局部区域的局部区域的速度范围为1.19至11.22冲积沉积物。此外，剪切波速度范围为320米/秒和684米/秒的刚性土壤区域，以非常致密的土壤/或软岩体，与钻孔数据的岩土参数相比很好地相关。基于这些结果，国王沙特大学校园内近地表沉积物的地面条件表明了导致地下沉降的弱区，从而导致基础的差异定居点。

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