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| 1 | 特殊长周期地震动的参数特征研究显示文摘近断层脉冲型地震动和远场软土层场地类谐和地震动是两类特殊的长周期地震动,当前的规范均很少对这两类地震作用进行具体的规定。研究了近断层脉冲型和远场类谐和地震动的幅值、幅值比(V/A,D/V)、傅里叶幅值谱和反应谱的差别,分析了相位角和作用循环周期数对简单脉冲的影响,并用于解释两类特殊地震动的工程特征。以集集地震动为数据基础,分析了两类长周期地震动的傅里叶谱和反应谱特征;将平均加速度和位移规准反应谱分别与规范设计谱进行了比较。建议设计谱在长周期段考虑近断层作用和软土场地面波效应的影响。 | 徐龙军 胡进军 谢礼立 | 2008 | 地震工程与工程振动2008，28，6： | 54 |
| 2 | Design spectra including effect of rupture directivity in near-fault region显示文摘In order to propose a seismic design spectrum that includes the effect of rupture directivity in the near-fault region, this study investigates the application of equivalent pulses to the parameter attenuation relationships developed for near-fault, forward-directivity motions. Near-fault ground motions are represented by equivalent pulses with different waveforms defined by a small number of parameters (peak acceleration, A, and velocity V; and pulse period, Tv). Dimensionless ratios between these parameters (e.g., ATv /V, VTv /D) and response spectral shapes and amplitudes are examined for different pulses to gain insight on their dependence on basic pulse waveforms. Ratios of ATv /V, VTv /D, and the ratio of pulse period to the period for peak spectral velocity (Tv-p) are utilized to quantify the difference between rock and soil sites for near-fault forward-directivity ground motions. The ATv /V ratio of recorded near-fault motions is substantially larger for rock sites than that for soil sites, while Tv-p /Tv ratios are smaller at rock sites than at soil sites. Furthermore, using simple pulses and available predictive relationships for the pulse parameters, a preliminary model for the design acceleration response spectra for the near-fault region that includes the dependence on magnitude, rupture distance, and local site conditions are developed. | 徐龙军 Adrian Rodriguez-Marek 谢礼立 | 2006 | Earthquake Engineering and Engineering Vibration2006，5，2： | 9 |
| 3 | 近断层地震动双规准伪速度谱及其应用显示文摘具有向前方向性效应特征的地震动与普通远场地震动存在明显差异.作者曾尝试结合简单脉冲和近断层地震动参数衰减关系提出此类地震动的设计谱模型.为进一步检验所提出设计谱的适用性,分析了53条典型近断层方向性效应地震动的伪速度谱、规准伪速度谱和双规准伪速度谱,发现方向性效应地震动的双规准伪速度谱在土层和岩石场地上具有差别明显,且离散性小的特点.考虑场地条件的影响,基于双规准伪速度谱预测了近断层方向性效应地震动的设计谱,并与此前的研究结果进行了对比.结果表明,场地条件对于近断层方向性效应地震动影响显著;位于近断层岩石场地的建筑结构,尤其是中、短振动周期结构,可能比土层场地更易于遭受破坏.最后,提出了用于近断层结构抗震分析的简单脉冲模型的建议. | 徐龙军 谢礼立 | 2007 | 地震学报2007，29，5： | 7 |
| 4 | 近断层方向性效应地震动双规准组合反应谱显示文摘为了给近断层设计谱的确定提供新的方法和参考依据,考虑场地条件的影响,分析了53条具有典型近断层方向性效应特征的地震动记录的双规准组合反应谱的特征.相比传统的地震动加速度、速度和位移反应谱,组合反应谱的谱值与地震动的幅值相关性更强;双规准组合谱具有更低的统计变异性.最后,给出了基于双规准组合谱特征的近断层区场地相关设计谱模型. | 张洪智 刘秀明 徐龙军 | 2014 | 哈尔滨工业大学学报2014，46，10： | 3 |
| 5 | Near-fault ground motions with prominent acceleration pulses:pulse characteristics and ductility demand显示文摘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. | Mai Tong Vladimir Rzhevskyt Dai Junwu George C Lee Qi Jincheng Qi Xiaozhai | 2007 | Earthquake Engineering and Engineering Vibration2007，6，3： | 3 |
| 6 | 基于分解方法的近断层区结构地震反应分析显示文摘近断层长周期地震动是一类较特殊的破坏性地震动,对长周期结构的破坏尤为显著。为深入分析近断层地震动的工程特性,基于小波分析中的多尺度分析方法对近期12次典型破坏性地震的53条近断层地震动进行了分解,得到266条地震动分量。通过研究地震动分量的幅值、周期和双规准谱的特征,提出了一种评估近断层区建筑结构地震反应的方法。这种方法能够给出单自由度弹性体系在周期为0.3~20 s 地震动分量作用下的最大绝对加速度反应,并综合考虑了场地和断层距的影响,给出了简洁的函数表达式,为近断层区建筑结构尤其是长周期结构的设计提供了参考依据。 | 赵国臣 徐龙军 许昊 谢礼立 | 2015 | 振动工程学报2015，28，2： | 0 |
| 7 | Near-fault ground motion bi-normalized pseudo-velocity spectra and its applications显示文摘Ground motions with forward-directivity effect in the near-fault region are obviously different from ordinary far-field ground motions. Design spectral models for this kind of motions have been proposed by correlating sim-ple pulses with parameters attenuation relationships in a previous study of the authors. To further test the applica-bility of the established design spectral model, we analyze ground motion pseudo-velocity response spectra (PVS), normalized pseudo-velocity spectra (NPVS) and bi-normalized pseudo-velocity spectra (BNPVS) of 53 typical near-fault forward-directivity ground motions. It is found that BNPVS not only has more salient features to reflect the difference between soil and rock sites, but also has less scattering to reveal the nature of forward-directivity motions. And then, BNPVS is used for prediction of design spectra accounting for the influence of site conditions, and the constructed design spectra are compared with those spectra established previously. It is concluded that site condition can heavily affect ground motions, buildings on rock can be even more dangerous than those on soil sites, in particular for ordinary buildings with short to middle vibration periods. Finally, pulse models are also suggested for structural analyses in the near-fault region. | 徐龙军Engineering College Ocean University of China 谢礼立 | 2007 | Acta Seismologica Sinica(English Edition)2007，20，5： | 0 |
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