【摘要】 反应谱特征周期反映了地震动频谱特性,也是抗震设计中重要的特征参数。为了研究汶川特大地震反应谱特征周期的特性,本文以汶川地震中173个有详细地勘场地上的强震动记录为基础,统计分析了不同场地类别和断层距的反应谱特征周期,并与我国现行抗震设计规范中特征周期的规定值进行比较。本文研究结果显示随着场地变软,特征周期平均值有增大趋势;与汶川特大地震中反应谱特征周期的统计结果相比,我国抗震设计规范规定的远场反应谱特征周期值偏小。更多还原

【Abstract】 Characteristic period of response spectrum reflects the strong motion’s characteristic,and it is a most important characteristic parameter for seismic design.To study the character of the characteristic period of response spectrum in Wenchuan earthquake,this paper selects strong ground motion records from 173 sites with detailed reconnaissance,statistically analyzes the characteristic period of response spectrum with different sites and different distances from the fault,and compares with the provision value in Chinese code for seismic design.It is proved that the characteristic period of response spectrum increases when the site becomes soft.Compared with the statistical value of characteristic period of Wenchuan earthquake,the provided value in Chinese code for seismic design far from the fault is smaller.更多还原