- 摘 要
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［摘要］回顧了中、美、歐抗震設(shè)計(jì)規(guī)范關(guān)于不同阻尼比反應(yīng)譜的相關(guān)規(guī)定及其存在的問題。通過理論分析指出，長周期、大阻尼的結(jié)構(gòu)，阻尼力的影響不可忽略，工程設(shè)計(jì)反應(yīng)譜應(yīng)以彈性力為依據(jù)進(jìn)行標(biāo)定。根據(jù)實(shí)際地震記錄反應(yīng)譜的綜合阻尼調(diào)整系數(shù)的分析，給出了規(guī)范(GB 50011—2001)的反應(yīng)譜修正方案。
［關(guān)鍵詞］反應(yīng)譜；阻尼比；阻尼力；彈性力；阻尼調(diào)整系數(shù)
中圖分類號：TU318 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2011)11-0016-06
Researches about the response spectra with different damping ratio
Luo Kaihai, Wang Yayong(CABR Technology Co., Ltd., China Academy of Building Research, Beijing 100013，China)
Abstract: The related provisions in the seismic design codes of China, America and Europe about the design response spectra with different damping ratio, and the unreasonable respects about these provisions were reviewed. Through the theory analysis, it was pointed out that for the long period and large damping structures, the damping force shall not be neglected, and the response spectra applied in the engineering design should be determined by the elastic force of SDOF. According to the analytical results of the comprehensive damping modification factors of the response spectra of a number of earthquake records, two modification proposals for the design response spectra in Code for seismic design og buildings (GB 50011—2001) are presented.
Keywords: response spectra; damping ratio; damping force; elastic force; damping modification factor
*“十一五”國家科技支撐計(jì)劃項(xiàng)目（2009BAJ28B03）。
作者簡介：羅開海(1973-)，男，博士，副研究員，研究方向：工程抗震，Email：kailuo@263.net。
參考文獻(xiàn)
［1］GB 50011—2001 建筑抗震設(shè)計(jì)規(guī)范［S］. 北京：中國建筑工業(yè)出版社，2001.
［2］IBC—2003 International building code［S］. Country Club Hills: International Code Council, Inc., 2003.
［3］FEMA 368 2000 edition NEHRP. Recommended provisions for seismic regulations for new buildings and other structures［S］. Washington, D.C.: Building Seismic Safety Council, 2001.
［4］FEMA 450 2003 NEHRP. Recommended provisions for seismic regulations for new buildings and other structures［S］. Washington, D.C.: Building Seismic Safety Council, 2004.
［5］BS EN 1998-1:2004 Eurocode 8: Design of structures for earthquake resistance. Part 1: General rules, seismic actions and rules for buildings［S］. London: British Standard Institute, 2005.
［6］CLOUGH R W, PENZIEN J. Dynamics of structures［M］. 2nd ed. New York: McGraw-Hill, Inc, 1993.
［7］CHOPRA A K. Dynamics of structures: theory and applications to earthquake engineering［M］. 2nd ed. New Jersey: Prentice Hall, Inc, 2001.
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