【摘要】 重大水电工程设计反应谱的合理确定是工程抗震设计的基本前提。本文提出基于场地地震安全性评价给定的输入参数、衰减关系和设计地震动加速度值,依据发生概率最大的原则和潜在震源中主要发震构造来确定设定地震的震级和震中距的方法。由设定地震计算场地相关设计反应谱时,建议采用不经烈度转换的反应谱衰减关系。实例分析表明,本文方法所确定的设定地震及场地相关设计反应谱较为合理,能满足重大水电工程抗震设计需求。更多还原

【Abstract】 The reasonable determination of design response spectrum is the essential precondition for seismic design of important hydropower structures. According to input parameters,attenuation relationships and design seismic acceleration given by the evaluation of the seismic safety of the site in consideration,a method of determining the magnitude and epicentral distance of the scenario earthquake based on the principle of the maximum likelihood probability and the main fault of potential seismic source zone is proposed. When calculating the site-specific design response spectrum of the scenario earthquake,it is suggested to adopt the attenuation relationship of response spectrum without intensity conversion. The application of this method provides better results on scenario earthquake and site-specific design response spectrum,which can meet the requirements of seismic design of important hydropower structures.更多还原