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(1 廣州大學(xué)土木工程學(xué)院，廣州 510006；2 華南理工大學(xué)土木與交通學(xué)院， 廣州 510642；3 華南理工大學(xué)亞熱帶建筑科學(xué)國家重點實驗室， 廣州 510640)
［摘要］以第一階自振周期為7.35s的超高層框架-核心筒結(jié)構(gòu)為研究對象，依據(jù)《建筑抗震設(shè)計規(guī)范》(GB 50011—2010)反應(yīng)譜選取7條地震波，并補充7條長周期地震波作為輸入樣本，研究不同周期地震激勵對該類結(jié)構(gòu)抗震性能的影響。研究表明，根據(jù)規(guī)范選取的地震動周期(0.339～0.666s)與結(jié)構(gòu)第一自振周期相差較遠(yuǎn)。在14條長、短周期地震波激勵下，結(jié)構(gòu)位移、損傷、變形及能量耗散均存在較大差異。長周期地震動作用下，最大層間位移角的平均值比短周期大2.57倍，部分主要受力構(gòu)件發(fā)生嚴(yán)重?fù)p傷、變形，滯回耗能占總輸入能最大可達(dá)到36.4%，而短周期地震動作用下結(jié)構(gòu)基本處于完好狀態(tài)。因此，對于自振周期超出規(guī)范范圍(6s)的長周期結(jié)構(gòu)，僅根據(jù)規(guī)范選取的地震動難以評估結(jié)構(gòu)的抗震能力，建議選取不同周期地震動全面地評估長周期結(jié)構(gòu)的抗震性能。
［關(guān)鍵詞］長周期地震波; 長周期超高層結(jié)構(gòu); 彈塑性時程分析; 損傷分析; 滯回耗能
中圖分類號：TU973+.2 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2014)19-0040-06
Study on seismic performance of super high-rise frame-core tube structures under long-period ground motions
Zhang Junwen1, Wu Yi1, Yang Chun2,3, Zhang Chunmei1 , Chen Lin1 , Wang Hongwei1
(1 School of Civil Engineering, Guangzhou University, Guangzhou 510006,China; 2 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China; 3 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China)
Abstract: A super high-rise frame-core tube structure with the natural vibration period of 7.35s was selected to study the seismic performances and effects of long-period high-rise buildings under different period earthquake excitations. Seven ground motions were selected according to the designing spectrum defined in Code for seismic design of buildings(GB 50011—2010), and seven long-period ground motions were also selected as a supplement. Results show that the predominant periods of the seven ground motions based on the code are between 0.339s and 0.666s, which are much different from the natural period of the structure. Under the fourteen earthquake actions with different periods, the development of damages, deformation and energy dissipation of main structural components differ significantly. Under long-period ground motions, the averaged maximum story drift is 2.57 times of that under shortperiod ground motions, and serious plastic deformation and damage can be found in some main structural members and the hysteretic energy of plastic deformation could be up to 36.4% of the total input energy. While the structure is basically in good condition under short-period excitations. Therefore, for structures with natural period longer than the range of design spectrum in the code, seismic capability of the structure can not be estimated properly under ground motions chosen merely by the code. Earthquake actions with different periods are recommended to comprehensively evaluate seismic performances of the long-period structures.
Keywords: long-period ground motion; long-period high-rise structure; elastic-plastic timehistory analysis; damage analysis; hysteretic-energy
*國家自然科學(xué)基金青年科學(xué)基金（51108104）,廣東省自然科學(xué)基金（S2012010010074）,市屬高校“羊城學(xué)者”
科研項目（12A001D），省科技計劃科研項目（2013B02020016）及國家留學(xué)基金資助。
通訊作者：吳軼，教授，博士，Email：cv-wuyi@gzhu.edu.cn。
參考文獻(xiàn)
［1］周福霖，崔鴻超，安部重孝，等．東日本大地震災(zāi)害考察報告［J］．建筑結(jié)構(gòu)，2012，42（4）：8-11．
［2］吳瓊，陳清軍．高層框架結(jié)構(gòu)長周期地震反應(yīng)分析［J］．結(jié)構(gòu)工程師，2011，27（1）：78-84．
［3］王亞勇，王理，劉小弟．不同阻尼比長周期抗震設(shè)計反應(yīng)譜研究［J］．工程抗震，1990（1）：38-41．
［4］翁大根，徐植信．上海地區(qū)抗震設(shè)計反應(yīng)譜研究［J］．同濟大學(xué)學(xué)報：自然科學(xué)版，1993，21（1）：9-16．
［5］王曙光，杜東升，劉偉慶，等．隔震結(jié)構(gòu)不同阻尼比地震影響系數(shù)曲線的改進研究［J］． 建筑結(jié)構(gòu)學(xué)報，2009，30（3）：112-119．
［6］劉大海，楊翠如． 高層建筑抗震設(shè)計［M］．北京:中國建筑工業(yè)出版社，1993．
［7］GB 50011—2010 建筑抗震設(shè)計規(guī)范［S］．北京：中國建筑工業(yè)出版社，2010．
［8］廖述清，裴星洙，周曉松，等． 長周期地震波作用下結(jié)構(gòu)的彈塑性地震反應(yīng)分析［J］． 建筑結(jié)構(gòu)， 2005， 35（5）:24-27．
［9］KUTAY ORAKCAL, LEONARDO MASSONE. Analytical modeling of reinforced concrete walls for predicting flexural and coupled-shear-flexural responses［R］. Los Angeles: University of California, 2006．
［10］MANDER J B, PRIESTLEY M J N, PARK R. Theoretical stress-strain model for confined concrete［J］．Journal of Structural Engineering, 1988，114(8)：1804-1826．
［11］鐘善桐． 鋼管混凝土統(tǒng)一理論研究與應(yīng)用［M］． 北京：清華大學(xué)出版社，2006．
［12］WATSON J A, ABRAHAMSON N A. Selection of ground motion time series and limits on scaling［J］. Soil Dynamics and Earthquake Engineering， 2006，26（5）：477-482．
［13］Computer and Structure, Inc. Perform-3D user guides ［M］. USA：University of California, Berkeley, 2011．
［14］GB 50010—2010混凝土結(jié)構(gòu)設(shè)計規(guī)范［S］．北京：中國建筑工業(yè)出版社，2011．
［15］季靜，肖啟艷，黃超，等．基于性能的鋼筋混凝土剪力墻受彎破壞變形限值的研究［J］． 建筑結(jié)構(gòu)學(xué)報，2010，31（9）：35-41．
