Numerical Modelling of Seismic Site Effects Incorporating Non-linearity and Groundwater Level Changes

• Published in: Journal of earth science (Wuhan, China) China), 2010 (6), p.931-940
• Main Author: Dominik Ehret Joachim Rohn Dieter Hannich Carlos Grandas Gerhard Huber
• Format: Article
• Language: Chinese
• Subjects: 地下水位变化; 地震小区划; 地震现场; 岩土工程勘察; 数值模型; 数值模拟; 水文地质模型; 非线性度
• ISSN: 1674-487X; 1867-111X

In the past decades, the necessity for detailed earthquake microzonation studies was recognized worldwide. Therefore, different approaches were established and applied. Unfortunately, the majority of these approaches are not based on pre-existing field data but require extensive seismic measurements and investigations. Furthermore, these approaches incorporate non-linearity inadequately and cannot take groundwater level changes into account. For this purpose, notably numerical models are most suitable. These models require a good knowledge of the local geological conditions （especially of the uppermost unconsolidated units）, information about the geotechnical parameters of these units, and a hydrogeological model of the investigated area. Most of this information can be obtained from geotechnical investigations and surveys that have already been carried out in most densely populated areas. In a case study for Bucharest City, non-linear analyses were performed using software that is based on the visco-hypoplas