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以12条典型地震波记录为输入,分析不同周期高层混合结构的弹塑性总输入能,并通过建立地震波能量时频特征与结构弹塑性总输入能之间的联系,了解高层混合结构弹塑性总输入能的变化趋势及其成因。研究表明,结构进入弹塑性状态后总输入能的变化源于地震波能量主振频段的改变。对于周期较小的结构,结构的塑性发展使总输入能增加,而对于周期较大的结构,周期的增大使得总输入能变小或者不发生变化。提出了一种高层混合结构弹塑性总输入能的简化计算方法,计算结果偏于安全。
Taking 12 typical seismic wave records as inputs, the total elastic-plastic input energy of high-rise mixed structures with different periods is analyzed and the relationship between the time-frequency characteristics of seismic energy and the total elastic-plastic input energy of the structure is established. The changing trend of energy and its causes. The results show that the change of the total input energy after the structure enters the elasto-plastic state is due to the change of the main vibration frequency band of seismic energy. For smaller structures, the plasticity of the structure increases the total input. For larger structures, the increase of the periodicity makes the total input smaller or does not change. A simplified method to calculate the total elastic-plastic input energy of high-rise hybrid structures is proposed. The calculation results are biased towards safety.