Evaluation of Peak Ground Velocity as a “Good” Intensity Measure for Near-Source Ground Motions
Evaluation of Peak Ground Velocity as a “Good” Intensity Measure for Near-Source Ground Motions
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DOI：
10.1061/(asce)0733-9399(2004)130:9(1032
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发表时间：
2004-08
期刊：
影响因子：
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通讯作者：
N. Makris;C. Black
中科院分区：
文献类型：
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作者：
N. Makris;C. Black
本文探讨了峰值地震动速度作为土木结构地震烈度可靠度量的“优度”问题。本文强调了区分加速度脉冲和速度脉冲的重要性，并确定了两类近源地面运动：峰值地面速度是一个可区分的加速度脉冲的积分和峰值地面速度是一系列高频，单侧加速度尖峰的结果。结果表明，由前一类引起的震动一般比由后一类运动引起的震动更猛烈，即使属于前一类的运动可能是由震级明显较小的地震产生的。建立在配套文件中介绍的量纲分析，本文表明，线性和非线性结构响应从各种记录，表现出可区分的脉冲尺度更好地与峰值脉冲加速度。
This paper investigates the “goodness” of peak ground velocity as a dependable intensity measure for the earthquake shaking of civil structures. The paper stresses the importance of distinguishing between acceleration pulses and velocity pulses, and identifies two classes of near-source ground motions: those where the peak ground velocity is the integral of a distinguishable acceleration pulse and those where the peak ground velocity is the result of a succession of high-frequency, one-sided acceleration spikes. It is shown that the shaking induced by the former class is in general much more violent than the shaking induced by the latter class of motions even when motions that belong to the former class may be generated by significantly smaller-magnitude earthquakes. Building on the dimensional analysis introduced in the companion papers this paper shows that both linear and nonlinear structural responses from a variety of records which exhibit distinguishable pulses scale better with the peak pulse accel...