【摘要】 基于Open Sees平台建立自振周期不同的3层、12层的框架结构模型,并对这些结构在近场脉冲型地震动和普通地震作用下的动力响应进行了研究。通过比较分析,得到了近场脉冲型地震与不含速度脉冲地震对结构反应影响的区别。结果表明:近场脉冲型地震动含有较丰富的低频成分,因此近场脉冲型地震动作用在中长周期的框架结构上产生的层间位移角远大于不含速度脉冲地震加载后产生的层间位移角,而在短周期的结构上二者产生的层间位移角相差不大,近场脉冲型地震动对长周期结构的影响更为明显。更多还原

【Abstract】 Establish 3-story,12-story frame structure models based on the Open Sees platform,which have different natural vibration periods. Seismic response of these frame structures subjected to near-fault pulse-like ground motions and ordinary ground motions is investigated. The different influences of near-field pulse-like and non-velocity pulse ground motions on the structural response were got by comparison. A mild decline due to abundant low frequencies is found in the responsive spectra for near-field pulse-like ground motions. Hence,the story-drift on moderate and long-period frame structure under near-field pulse-like was greater than the non-field pulse-like ground motions. However,the drift on short-period frame structure had no significant difference under the two. Therefore,nearfield pulse-like ground motions had obvious influence on long-period structures.更多还原