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

9416383 Vucetic过去和未来的损失评估是在城市地区的强震的社会经济影响的评估的首要重要性。 过去的地震表明，除了震源和路径效应，破坏模式与当地的地质和岩土工程条件有关。 调查的目的是利用北岭地震的经验，开发创新的方法，估计和预测当地土壤条件相关的损害。 这些方法是基于现代GIS（地理信息系统）计算技术的小区。 主要的焦点是在非线性范围内的土壤放大所造成的损害。 该研究包括以下组成部分：（1）完成受强烈震动影响地区的详细数字化岩土数据库，（2）修改非线性场地反应模型，以便纳入地理信息系统，（3）将岩土数据库和非线性场地反应模型纳入地理信息系统，自动计算区域内非线性场地反应特征的分布;（4）将1和3的结果与记录的地面运动和损伤分布进行比较，（5）在此基础上发展了局部立地效应的GIS估算和预测方法。 其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分区图。 它们是：（i）一个详细的三维岩土数据库，其中包含数字化钻孔记录，包括土壤分类特性、剪切波速度和随深度分布的标准贯入试验结果，（ii）不同深度的平均土壤特性、剪切波速度和标准贯入试验结果图，（iii）根据剪切波速度新标准的场地分类图，（iv）一维非线性场地反应分析的近似设计曲线和参数数据库，（v）不同时期范围内的土壤诱发放大图，以及（vi）一系列比较记录损坏和上述图的图。 ***

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. ***