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A New Definition Of Strong Motion Duration And Related Parameters Affecting The Response Of Medium-long Period Structures

机译：影响中长期结构响应的强运动持续时间及相关参数的新定义

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This study presents a new definition of the strong motion duration combining the alternative bracketed and significant duration definitions. Based on the time integral of the absolute ground velocity, a new index is defined, as cumulative absolute displacement (CAD), and used to estimate the strong motion duration. The proposed bracketed-significant duration t_(bs) is found to be well correlated with the strong motion part of the records, especially in the case of near-source events. The duration t_(bs) and the CAD index are used to assess the anticipated structural behavior of medium-long period structures. Two normalized parameters P_1 and P_2, representing the amplification of structural response and the number of equivalent loading cycles, respectively, are determined in terms of the t_(bs) and CAD and the spectral velocity associated with the medium-long period range. P_1 and P_2 appear to be better correlated with the structural response than established well-known indices.
机译：这项研究提出了一个强运动持续时间的新定义，结合了括号括起来的和有意义的持续时间定义。基于绝对地面速度的时间积分，定义了一个新指标，即累积绝对位移（CAD），并用于估算强运动持续时间。发现建议的括号内有效持续时间t_（bs）与记录的强运动部分有很好的相关性，尤其是在近源事件的情况下。持续时间t_（bs）和CAD指数用于评估中长期结构的预期结构行为。根据t_（bs）和CAD以及与中等长周期范围相关的谱速度，分别确定了两个标准化参数P_1和P_2，分别表示结构响应的放大和等效加载周期的数量。与已建立的知名指标相比，P_1和P_2与结构响应的相关性似乎更好。

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