| Near-fault ground motions with prominent acceleration pulses： pulse characteristics and ductility demand |
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| 作者姓名： | Mai Tong Vladimir Rzhevskyt Dai Junwu George C Lee Qi Jincheng Qi Xiaozhai |
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| 作者单位： | MCEER State University of New York at Buffalo USA，MCEER，State University of New York at Buffalo USA |
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| 基金项目： | U.S. National Science Foundation Under Grant CMS-0202846 |
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| 摘 要： | Major earthquakes of last 15 years (e.g., Northridge 1994, Kobe 1995 and Chi-Chi 1999) have shown that many near-fault ground motions possess prominent acceleration pulses. Some of the prominent ground acceleration pulses are related to large ground velocity pulses, others are caused by mechanisms that are totally different from those causing the velocity pulses or fling steps. Various efforts to model acceleration pulses have been reported in the literature. In this paper, research results from a recent study of acceleration pulse prominent ground motions and an analysis of structural damage induced by acceleration pulses are summarized. The main results of the study include: (1) temporal characteristics of acceleration pulses; (2) ductility demand spectrum of simple acceleration pulses with respect to equivalent classes of dynamic systems and pulse characteristic parameters; and (3) estimation of fundamental period change under the excitation of strong acceleration pulses. By using the acceleration pulse induced linear acceleration spectrum and the ductility demand spectrum, a simple procedure has been developed to estimate the ductility demand and the fundamental period change of a reinforced concrete (RC) structure under the impact of a strong acceleration pulse.
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| 关 键 词： | 地震 加速度脉冲 延展性 断层运动 脉冲特性 |
| 文章编号： | 1671-3664（2007）03-0215-09 |
| 修稿时间： | 2007-07-21 |
Near-fault ground motions with prominent acceleration pulses: pulse characteristics and ductility demand |
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| Mai Tong Vladimir Rzhevskyt Dai Junwu George C Lee Qi Jincheng Qi Xiaozhai.Near-fault ground motions with prominent acceleration pulses: pulse characteristics and ductility demand[J].Earthquake Engineering and Engineering Vibration,2007,6(3):215-223. |
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| Authors: | Mai Tong Vladimir Rzhevsky Dai Junwu George C Lee Qi Jincheng Qi Xiaozhai |
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| Institution: | 1. MCEER, State University of New York at Buffalo, USA
2. Institute of Enginering Mechanics, China Earthquake Administration, Harbin 150080, China |
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| Abstract: | Major earthquakes of last 15 years (e.g., Northridge 1994, Kobe 1995 and Chi-Chi 1999) have shown that many near-fault ground motions possess prominent acceleration pulses. Some of the prominent ground acceleration pulses are related to large ground velocity pulses, others are caused by mechanisms that are totally different from those causing the velocity pulses or fling steps. Various efforts to model acceleration pulses have been reported in the literature. In this paper, research results from a recent study of acceleration pulse prominent ground motions and an analysis of structural damage induced by acceleration pulses are summarized. The main results of the study include: (1) temporal characteristics of acceleration pulses; (2) ductility demand spectrum of simple acceleration pulses with respect to equivalent classes of dynamic systems and pulse characteristic parameters; and (3) estimation of fundamental period change under the excitation of strong acceleration pulses. By using the acceleration pulse induced linear acceleration spectrum and the ductility demand spectrum, a simple procedure has been developed to estimate the ductility demand and the fundamental period change of a reinforced concrete (RC) structure under the impact of a strong acceleration pulse. |
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| Keywords: | near-fault ground motions acceleration pulse ductility demand spectrum |
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