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首页> 外文会议>Coupled site and soil-structure interaction effects with application to seismic risk mitigation >EARTHQUAKE SOURCE AND LOCAL GEOLOGY EFFECTS ON THE SEISMIC SITE RESPONSE
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EARTHQUAKE SOURCE AND LOCAL GEOLOGY EFFECTS ON THE SEISMIC SITE RESPONSE

机译：震源和当地地质对地震反应的影响

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摘要

Strong shallow and intermediate-depth scenario earthquakes for two major cites in Bulgaria are discussed. The contribution of the earthquake source and the local site geology to the seismic input is illustrated. Due to the lack of strong motion records a neo-deterministic seismic hazard assessment procedure is used to generate synthetic seismic signals. After some parametric analyses the computed signals are validated against the few available data. Prognostic estimates of the dynamic coefficient for the target sites are performed with respect to the defined scenario earthquakes and local site models, corresponding to the Eurocode 8 (EC8) ground types A, B and C. The obtained results show that: (1) the seismic source influence on the seismic input at a given site is comparable with that of the local site geology; (2) the dynamic coefficients, computed for accelerograms (observed and computed) due to strong intermediate-depth Vrancea earthquakes overestimate significantly the values recommended by the EC8 for periods T > 1 s.
机译：讨论了保加利亚两个主要城市的强浅层和中深层情景地震。说明了地震源和当地地质对地震输入的贡献。由于缺少强运动记录，因此使用新确定性地震危险性评估程序来生成合成地震信号。在进行一些参数分析之后，针对少数可用数据验证了计算信号。针对定义的场景地震和本地站点模型（对应于欧洲规范8（EC8）地面类型A，B和C），对目标站点的动态系数进行了预后估计。获得的结果表明：（1）地震源对给定地点的地震输入的影响与本地地点地质的影响相当； （2）由于中等深度的Vrancea地震而产生的加速度图（观测和计算）的动态系数高估了T> 1 s期间EC8推荐的值。

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