摘要：长周期大幅值脉冲运动是近断层地震动的重要特征，也是引起结构震害的重要因素。在既有的地震动数据库基础上，筛选建立了长周期脉冲型记录的统计样本库，并构建了地震动特征参数的回归关系式。针对竖向反应谱，深入分析了竖向分量与水平向分量的加速度反应谱比值随脉冲周期和结构自振周期的变化规律，结果表明反应谱比值显著大于现行规范取值，进而采用分段线性化方法，建立了竖向反应谱比值随脉冲周期、自振周期变化的简化关系式，并对影响竖向反应谱曲线各拐点周期的特征比值进行统计分析，拟合得到了其随震级和断层距的衰减模型。
参考文献:

[1] Bertero V V et al. Establishment of design earthquakes: Evaluation of present
methods[J]．Proceedings Interntl. Symp. On Earthq. Struct. Engrg. St. Louis，Univ. of Missouri-Rolla, 1976, Vol.1: 551-580
[2] Niazi M, Bozorgnia Y M. Behavior of near-source peak vertical and horizontal
ground motion over SMART-1 array[M]. Taiwan, BSSA, 1991,81: 715-732
[3] Campbell K W. Empirical near-source attenuation relationships for horizontal
and vertical components of peak ground acceleration, peak ground velocity and pseudo-absolution response spectra[J]. Seismological Research Letter, 1997, 68:154-179
[4] 王国权．台湾集集地震近断层地面运动特征[D]．中国地震局地质研究所，
2001,106-108
Wang guoquan．Characteristics of near-fault earthquake motions for the Chi Chi earthquake [D]．Institute of Geology of China Seismological Bureau, 2001,106-108 (in Chinese)
[5] 李新乐．近断层区桥梁结构的设计地震与抗震性能研究[D]．北京交通大学博士学位论文，2005：130-153
Li Xinle． Study on design earthquake and seismic performance of bridge in near-fault area [D]. Beijing: Beijing Jiaotong University,2005:130-153 (in Chinese)
[6] UBC97, International Council of Building Officials(ICBO)．Uniform Building
Code[M]. Whittier CA 1997
[7] GB50011-2010．建筑抗震设计规范[S]．北京：中国建筑工业出版社, 2010，
20-80
GB50011-2010．China Seismic Design Code [S]．China building industry press,beijing, 2010,20-80 (in Chinese)
[8] JTG/T B 02-01-2008．公路桥梁抗震设计细则[S]．北京：人民交通出版社，
2008，17-18
JTG/T B 02-01-2008．Guidelines for seismic design of highway bridges [S]．People's Communications Publishing House, Beijing, 2008, 17-18 (in Chinese)
[9] Niazi M. Behavior of peak values and spectral ordinates of near-source strong
ground motion over the SMART 1 array[M]. Tenera, L.P. 1995 University Avenue Berkeley, CA 94704, 1990
[10] Ambraseys N N, Douglas J. Near-field horizontal and vertical earthquake ground
motions[J]. Soil Dynamics and Earthquake Engineering, 2003, 23: 1-18
[11] 耿淑伟, 陶夏新,王国新．对抗震设计规范中地震作用规定的三点建议[C]．现
代地震工程进展, 2003, 919-925
Gen shuwei, Tao xiaxin, Wang guoxin. Three suggestions for earthquake action of seismic design code[C]. Modern advances in Earthquake Engineering, 2003, 919-925 (in Chinese)
[12] Newmark N M, Hall W J. Seismic Design Criteria for Nuclear Reactor
Facilities[C]. Proceedings of 4th World Conference on Earthquake Engineering, Sandiago de Chile, Vol.II, B5, 1969, 1-12
[13] Eurocode 8, Design Provision for Earthquake Resistance of Structure[S].
Brussels: European Committee for Standardization, 2003
[14] Chopra A K, Chintanapakdee C. Comparing response of SDOF systems to
near-fault and far-fault earthquake motions in the context of spectral regions[J]. Earthquake Engineering and Structural Dynamics, 2001, 30: 769-1789

Abstract：The long-period large-amplitude pulse is a remarkable characteristic of near-fault earthquake ground motions, which is also an important factor leading the structure to damage or collapse. The database and regression relation for near-fault long-period pulse-type earthquake records are established based on the achieved data. The influence of pulse period and structural natural vibration period on the acceleration response spectra ratio of vertical to horizontal components was discussed in-depth. The response spectra ratios for near-fault long-period pulse-type records are larger than that given by existing seismic design codes. The simplified relationship of response spectra ratio obtained using piecewise linearization method varies as a function of pulse period and structural natural vibration period. The statistical results and attenuation relationship of characteristic ratio for vertical response spectra curve are given in this paper，which controls the inflection point periods of vertical response spectra and is related to earthquake magnitude and fault distance.