考虑震源机制的基础隔震结构反应谱研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (10) : 224-231.

论文

考虑震源机制的基础隔震结构反应谱研究

杜永峰1,2，洪娜1，徐天妮1，谢丽1

作者信息 +

Study on Response Spectra for Base-Isolated Structures Considering Focal Mechanism

DU Yong-feng1,2, HONG Na1, XU Tian-ni1, XIE Li1

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文章历史 +

摘要

将基础隔震结构简化为双自由度体系模型，研究震源机制对基础隔震结构反应谱的影响。在Ⅱ类场地条件下，选取605条地震记录作为统计样本，按照地震记录类型及震源机制进行分组，运用状态空间法得到了在近场及远场地震作用下的加速度、位移及能量反应谱。采用标准化和平均化的方式研究了反应谱的特性，并运用分段线性拟合的方法给出了设计反应谱的表达式，该表达式可以反映震源机制等因素对反应谱的影响作用，最后通过对某实际基础隔震工程进行算例验证，将计算结果与抗震规范进行对比，结果表明本文提出的表达式更为安全、合理，可将其应用于基础隔震结构的抗震设计中。

Abstract

This paper studies the effect of focal mechanism on the response spectra of isolated structures, by simplifying the base-isolated structure as 2-DOF model. 605 records in the Ⅱsite condition are selected as statistical samples. The earthquake records are divided into different groups according to the type of earthquake and focal mechanism. The acceleration, displacement and input energy response spectra under near-field and far-field ground motions are solved by using state-space method. The features of the response spectra are studied by means of normalizing and averaging, and the expressions of design response spectra are established by using piecewise linear fitting method. It can reflect the influence of focal mechanism for spectra. Finally, the expression is verified by the seismic response of a real base-isolated structure. And the value is compared with that from the design code. The result shows that the formula proposed in this paper is more safe and reasonable, and can be used in the seismic design for base-isolated structures.

导出引用

杜永峰1,2，洪娜1，徐天妮1，谢丽1. 考虑震源机制的基础隔震结构反应谱研究[J]. 振动与冲击, 2017, 36(10): 224-231

DU Yong-feng1,2, HONG Na1, XU Tian-ni1, XIE Li1. Study on Response Spectra for Base-Isolated Structures Considering Focal Mechanism[J]. Journal of Vibration and Shock, 2017, 36(10): 224-231

参考文献

[1] 曹家良,施卫星,刘文光等. 长周期结构相对位移反应谱研究[J]. 振动与冲击,2011,30,(7):63-70.
CAO Jialiang, Shi weixing, Liu Wenguang. Relative displacement response spectrum of a long-period structure [J]. Journal Of Vibration And Shock,2011,30,(7):63-70.
[2] Chung Y L,Nagae T,Hitaka T,et al.Seismic resistance capacity of high-rise buildings subjected to long-period ground motions:E-Defense shaking table test[J]. Journal of Structural Engineering,2010,136(6):637-644.
[3] 王博,白国良,代慧娟.典型地震动作用下长周期单自由度体系地震反应分析[J].振动与冲击,2013,32(15):190-196.
WANG Bo, BAI Guoliang, DAI Huijuan. Seismic response analysis of long-period SDOF system under typical ground motions[J].JOURNAL OF VTBRATION AND SHOCK,2013,32(15):190-196.
[4] 施卫星,李正升,汪大绥.基础隔震位移反应谱及其应用[J].同济大学学报.2000,28(1):29-32.
SHI Weixing, LI Zhengsheng, WANG Dasui. Calculation and application of displacement spectrum in base-isolated buildings[J].JOURNAL OF TONGJI UNIVERSITY. 2000,28(1):29-32.
[5] Rupakhety R, Sigurdsson SU, Papageorgiou AS. Quantification of ground motion parameters and response spectra in the near-fault region[J]. Bull Earthquake Eng,2011, 9, 898-930.
[6] 王亚楠,李慧,杜永峰等. 近场脉冲型地震动作用下设计位移反应谱[J]. 中南大学学报(自然科学版),2015,46(4):1511-1517.
WANG Yanan, LI Hui, DU Yongfeng. Displacement design spectra for near-fault pulse-type ground motions[J]. Jounal of Central South University(Science and Technology), 2015,46(4):1511-1517.
[7] 杜永峰,徐天妮,包超等.考虑非比例阻尼的基础隔震结构非线性反应谱研究[J].振动与冲击.(录用待刊).
DU Yongfeng,XU Tianni,BAO Chao.Study on Nonlinear Response Spectra for Base-Isolated Structures Considered Non-proportional Damping[J].JOURNAL OF VTBRATION AND SHOCK.(Hired to be published).
[8] 杜永峰,徐天妮,王亚楠等. 近断层地震动作用下设计速度反应谱研究[J]. 地震工程学报,2014,36(4):997-1013.
DU Yongfeng,XU Tianni,WANG Yanan.Analysis of designed velocity response spectra subjected to near-fault ground motion[J]. CHINA EARTHQUAKE ENGINEERING JOURNAL,2014,36(4):997-1013.
[9] R.克拉夫,王光远.结构动力学[M]. 北京:高等教育出版社. 2006.
Cao Jialiang, Shi weixing, Liu Wenguang. Relative displacement response spectrum of a long-period structure [J]. Journal Of Vibration And Shock, 2011, 30(7): 63―70. (in Chinese)
[10] Khalid S. Aldamegh, Hesham Hussein Moussa, S. Nasser Al-Arifi, et al. Focal mechanism of Badr earthquake, Saudia Arabia of August 27, 2009[J]. Arabian Journal of Geosciences, 2012,5(4):599-606.
[11] Norihito Umino, Tomomi Okada, Junichi Nakajima, et al. Hypocenter and focal mechanism distributions of aftershocks of July 26 2003 M6.4 northern Miyagi, NE Japan, earthquake revealed by temporary seismic observation[J]. Earth, Planets and Space, 2003,55(12):719-730.
[12] Hussam Busfar, M. Nafi Toksöz. Determining the focal mechanisms and depths of relatively small earthquakes using a few stations by full-waveform modelling[J]. Geophysical Prospecting, 2013,61(4):712-724
[13] 董娣,桑向国,刘锐等. 震源机制对近场地震动反应谱的影响[J]. 西北地震学报,2008,30(1):6-10..
DONG Di, SANG Xiangguo, LIU Rui. Effects of focal mechanism in near field response spectrum of ground motion[J].. NOTRH WESTERN SEISMOLAGICAL JOURNAL. 2008,30(1):6-10.
[14] 卢明奇. 近断层地震作用下弹性位移反应谱的研究[J]. 四川大学学报(工程科学版),2008,40(2):8-12.
Lu Mingqi. Research on Elastic Displacement Response Spectra of Near-fault Ground Motions[J]. JOURNAL OF SICHUAN UNIVERSITY (ENGINEERING SCIENCE EDITION). 2008, 40(2), 8-12.
[15] 贺秋梅,闫维明,董娣等. 震源机制和场地条件对近场强震地面运动特性的影响[J]. 地震研究,2006,29(3):256-263.
HE Qiumei,YAN Weiming,DONG Di.Effect of Focal Mechanism and Site Condition on strong near-field earthquake ground motion characteristics[J].JOURNAL OF SEISMOLOGICAL RESEARCH. 2006,29(3):256-263.
[16] 李新乐. 考虑场地和震源机制的近断层地震动衰减特性的研究[J]. 工程地质学报,2004,12(2):142-147.
LI Xinle. Attenuation characteristics of near-fault ground motions based on site and focal mechanism[J].. Jounal of Engineering geology. .2004,12(2):142-147.
[17] 吕红山,赵凤新. 适用于中国场地分类的地震动反应谱放大系数[J]. 地震学报,2007,29(1):67-76.
LV Hongshan,ZHAO Fengxin.The earthquake response spectra amplification factor applied to china’s site condition[J].ACTA SEISMOLOGAL SINICA.2004,12(2):142-147
[18] 秋山宏,叶列平. 基于能量平衡的建筑结构抗震设计[M]. 北京:清华大学出版社.2010.