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工程力学  2015 

不同类型近断层脉冲型地震动对框架-剪力墙结构的影响

DOI: 10.6052/j.issn.1000-4750.2012.06.S081

Keywords: 近断层,地震动,脉冲,框架-剪力墙结构,反应谱

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Abstract:

近断层脉冲型地震动对结构有很大的潜在破坏作用。为分析不同类型该类地震动对框架剪力墙结构地震反应的影响,搜集了近断层双脉冲和多脉冲型地震动,计算了这些地震动的加速度反应谱,及其引起的一个22层钢筋混凝土框架-剪力墙结构的时程反应。对比了双脉冲和多脉冲型地震动的平均弹性加速度反应谱,及其引起框架-剪力墙结构的平均基底剪力、平均最大层间位移角、平均顶层位移和平均结构整体破坏指数。结果表明：近断层双脉冲型地震动的平均弹性加速度反应谱谱值均接近或大于近断层多脉冲型地震动;近断层双脉冲型地震动引起的框架-剪力墙结构平均基底剪力、平均最大层间位移角、平均顶层位移和平均结构整体破坏指数均不小于近断层多脉冲型地震动。由此说明,在统计意义上,当分析近断层脉冲型地震动对框架-剪力墙结构破坏作用的影响时,输入地震动可近似仅考虑双脉冲型地震动。

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