Evaluation of Local Site Effects Using GIS, SCEC Geotechnical Database, and Nonlinear Site Response Model- 1994 Northridgequake

使用 GIS、SCEC 岩土数据库和非线性场地响应模型评估局部场地影响 - 1994 年北岭地震

• 批准号: 9416383
• 负责人: Mladen Vucetic
• 金额: $ 6万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9416383&HistoricalAwards=false
• 关键词: Evaluation; Local; Site; Effects; Using

9416383 Vucetic The assessment of past and future damages are of primary importance in the evaluation of the socio-economic impact of strong earthquakes in urban areas. Past earthquakes have shown that, besides the source and path effects, damage patterns are associated with local geologic and geotechnical conditions. The objective of the investigation is to use the Northridge earthquake experience to develop innovative methods for the estimation and forecasting of the damages related to local soil conditions. The methods are based on modern GIS (Geographic Information System) computing technologies for microzoning. The primary focus is on the damage caused by soil amplification in the nonlinear range. The research includes the following components: (1) completion of a detailed digitized geotechnical data base for the region affected by strong shaking, (2) modification of the nonlinear site response model to allow for the integration into GIS, (3) integration of the geotechnical data base and nonlinear site response model into GIS, and automatic calculation of the distribution of nonlinear site response characteristics over the region, (4) comparisons of the results from 1 and 3 with recorded ground surface motions and damage distribution, and (5) development of the GIS methods for estimation and forecasting of local site effects based on these comparisons. The results will include a series of digitized GIS data bases and associated microzoning maps. They are: (i) a detailed 3-D geotechnical data base containing digitized boring logs with soil classification properties, shear wave velocity and SPT results distributed with depth, (ii) maps of average soil properties, shear wave velocities and SPT results for different depths, (iii) map of site classification according to new criteria on shear wave velocities, (iv) a data base of approximate design curves and parameters for 1-D nonlinear site response analyses, (v) maps of soil-induced amplification for different period ranges, and (vi) a series of maps comparing recorded damages and the maps listed above. ***

9416383 Vucetic 对过去和未来损失的评估对于评估城市地区强震的社会经济影响至关重要。 过去的地震表明，除了震源和路径效应外，破坏模式还与当地的地质和岩土条件有关。 该调查的目的是利用北岭地震经验开发创新方法来估计和预测与当地土壤条件相关的损害。 这些方法基于现代 GIS（地理信息系统）微分区计算技术。 主要关注的是非线性范围内土壤放大造成的损害。 该研究包括以下组成部分：(1) 完成受强震动影响区域的详细数字化岩土数据库，(2) 修改非线性场地响应模型以允许集成到 GIS 中，(3) 集成将岩土数据库和非线性场地响应模型导入GIS，并自动计算该区域非线性场地响应特征的分布，（4）将1和3的结果与记录的地表运动和损伤分布进行比较，以及（5）的发展基于这些比较来估计和预测当地场地影响的 GIS 方法。 结果将包括一系列数字化地理信息系统数据库和相关的微区划地图。 它们是：(i) 详细的 3-D 岩土数据库，包含数字化钻孔日志，其中包含随深度分布的土壤分类属性、剪切波速度和 SPT 结果，(ii) 不同深度的平均土壤属性、剪切波速度和 SPT 结果图。深度，(iii) 根据剪切波速新标准的场地分类图，(iv) 用于一维非线性场地响应分析的近似设计曲线和参数的数据库，(v) 不同土壤引起的放大图周期范围，以及 (vi) 一系列地图，将记录的损害与上面列出的地图进行比较。 ***