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首页> 外文会议>International Symposium on Geotechnical Measurements and Modelling; Sep 23-25, 2003; Karlsruhe, Germany >Experimental and numerical investigation of the influence of local site conditions on the ground motion during strong earthquakes
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Experimental and numerical investigation of the influence of local site conditions on the ground motion during strong earthquakes

机译：强震条件下局部场地条件对地震动影响的实验与数值研究

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The paper presents a numerical method for the analysis of ground response during strong earthquakes validated using laboratory and field data. The method is based on a one-dimensional wave propagation model in which the nonlinear soil behaviour is described by a (visco)hypoplastic constitutive law. Model tests using a novel laminar box mounted on a shaking table have been performed in the laboratory to verify the applicability of the (visco)hypoplastic constitutive relation to the modelling of the soil behaviour under dynamic earthquake-like excitation. To validate the model for real field conditions, two typical soil profiles from the Bucharest Vrancea region are used: soft cohesive soil near INCERC station and non-cohesive soil near EREN station. It is concluded that local soil conditions significantly affect the ground response during strong earthquakes and should be properly considered when performing seismic hazard, vulnerability and risk analyses. As shown by the present study, the proposed numerical model is able to fulfil this requirement.
机译：本文提出了一种通过实验室和现场数据验证的用于分析强地震期间地面响应的数值方法。该方法基于一维波传播模型，在该模型中，通过（粘）塑性减定本构关系描述了非线性土壤行为。在实验室中已经使用安装在振动台上的新型层流箱进行了模型测试，以验证（粘性）增塑性本构关系在类地震动态激励下对土壤行为建模的适用性。为了验证该模型的真实现场条件，使用了布加勒斯特弗朗塞地区的两种典型土壤剖面：INCERC站附近的软粘性土和EREN站附近的非粘性土。得出的结论是，当地土壤条件会在强烈地震中显着影响地面响应，因此在进行地震危害，脆弱性和风险分析时应适当考虑。如本研究所示，所提出的数值模型能够满足这一要求。

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