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目前地震能量分析方法的研究多集中于对结构总输入能与总滞回耗能的简化估计,忽略了能量沿时间轴输入历程的不同所导致的结构反应的差别。该文以瞬时输入能量在时间轴上的分布特征(瞬时输入能量时变特征)来描述地震能量输入历程的特点,并通过建立瞬时输入能量时变特征与结构位移历程之间的联系,获得了基于能量参数的结构位移历程求解方法。为验证该方法的准确性,采用最大位移值和等效循环次数两个指标分别进行比较,分析表明,该方法在模拟弹性结构的幅值反应和持时反应上具有较好的准确性。该模型的获得将为基于能量概念的弹塑性结构损伤历程研究提供必要的基础。
At present, the research of seismic energy analysis methods mostly focuses on the simplified estimation of total input energy and total hysteresis energy consumption of structures, ignoring the differences in the structural responses caused by the different energy input along the time axis. This paper describes the characteristics of seismic energy input process based on the distribution of instantaneous input energy (time-varying characteristics of instantaneous input energy) and establishes the relationship between the time-varying features of transient input energy and the displacement history of the structure Solution of Structure Displacement History Based on Energy Parameters. In order to verify the accuracy of this method, the maximum displacements and the number of equivalent cycles are compared respectively. The results show that this method has good accuracy in simulating the amplitude response and the time-dependent reaction of elastic structures. The acquisition of this model will provide the necessary foundation for the study of damage history of elastoplastic structures based on energy concept.