【摘要】 分别采用中国、日本和美国三国规范中定义的等效线形化法和时程分析方法,基于单质点模型计算了不同周期隔震结构的地震反应。通过加速度反应和位移反应发现中国现行抗震设计规范中设计反应谱的长周期段反应谱偏大。文中根据加速度反应谱的时程分析结果,在现有设计反应谱的基础上提出了新的长周期段反应谱修正公式提案。文末采用新提案的设计反应谱,利用等效线性化法对隔震结构进行了地震反应分析,结果与时程分析法的分析结果一致,研究表明新提案的反应谱取值在进行隔震结构的地震反应分析时具有良好的计算精度。更多还原

【Abstract】 Based on a single-mass model,the earthquake responses of isolation structures with different natural periods were analyzed by using the equivalent linearization method and the time history analysis method according to China,Japan and USA codes.Through comparison of acceleration response spectra,it was found that the response spectrum of the long period part of the design response spectrum in China code is too large.According to the results of time history analysis,the modified equation for the long period part was proposed based on the original acceleration response spectrum.Finally,the earthquake response of an isolation structure was computed by using the new modified acceleration response equation and the time history analysis method,and the results obtained with the modified long period response spectrum were consist with those of the time history analysis.The response analysis results showed that the proposed equation of response spectrum has higher analysis precision for isolated structures.更多还原