The special interest produced by near‐field directivity records and their effect on structural response has given a new significance in the velocity time history, its pulse‐like content, and relevant parameters and indices. Recent research has shown that directivity pulses inherent in these records govern the linear and the nonlinear response of a wide range of structures. Based on this observation, it is suggested in this paper that a truncated ground motion, limited to the duration of the predominant velocity pulse, can be efficiently used to predict the structural response, instead of the base motion with the total duration, reducing significantly the required runtimes. The proposed methodology is verified for a series of medium to high rise reinforced concrete buildings, for which nonlinear time‐history analyses are performed for a vast suite of pulse‐like near‐field records applied as base excitations with their total duration and the proposed truncated one. Comparison of the results for the response displacements and forces shows very good agreement, permitting the acceptance of the pulse duration as the efficient strong motion time interval of the original record, which determines the response and, thus, it can be used for nonlinear structural analyses.

中文翻译：

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脉冲状记录的有效强运动持续时间，用于非线性结构分析

近场方向性记录引起的特殊兴趣及其对结构响应的影响在速度时程，其脉冲状内容以及相关参数和指标方面赋予了新的意义。最近的研究表明，这些记录中固有的方向性脉冲控制着各种结构的线性和非线性响应。基于这一观察，本文建议，限于主要速度脉冲的持续时间的截断的地面运动可以有效地用于预测结构响应，而不是总持续时间的基础运动，从而显着减少了地面运动。所需的运行时。所提出的方法已针对一系列中高层钢筋混凝土建筑进行了验证，为此，对大量脉冲状近场记录进行了非线性时程分析，这些记录被用作基本激励及其总持续时间和拟议的截断记录。对响应位移和力的结果进行比较显示出很好的一致性，可以接受脉冲持续时间作为原始记录的有效强运动时间间隔，该间隔确定了响应，因此可以用于非线性结构分析。