超高層結(jié)構(gòu)地震剪力系數(shù)限值研究*
汪大綏，周建龍，姜文偉，王建，江曉峰
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汪大綏，周建龍，姜文偉，王建，江曉峰（華東建筑設(shè)計研究院有限公司，上海 200002）［摘要］基于目前抗震設(shè)計規(guī)范中地震剪力系數(shù)限值的要求，針對目前國內(nèi)高度較高（500m以上）的超高層建筑設(shè)計實際，介紹了地震剪力系數(shù)一般較難滿足規(guī)范要求的情況，分析了超高層結(jié)構(gòu)地震剪力系數(shù)的影響因素，指出結(jié)構(gòu)周期、場地土特征周期是相對較為顯著的影響因素，超高層結(jié)構(gòu)阻尼比因變化幅度較小一般對地震剪力系數(shù)影響較小。分析了設(shè)計中提高地震剪力系數(shù)的方法。提出了地震剪力系數(shù)限值的一些建議，包括地震剪力系數(shù)限值與場地土類型相關(guān)、減小高度超高結(jié)構(gòu)地震剪力系數(shù)限值等。［關(guān)鍵詞］超高層建筑；地震剪力系數(shù)；限值；基本周期；場地土特征周期中圖分類號：TU398.7文獻標識碼：A文章編號：1002-848X(2012)05-0024-04Research on seismic shear gravity ratio limit for super high-rise buildings higher than 500mWang Dasui, Zhou Jianlong, Jiang Wenwei, Wang Jian, Jiang Xiaofeng (East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China)Abstract: For super high rise buildings higher than 500 meters, seismic shear gravity ratio is often hard to satisfy code requirement for most projects in China. Several influence factors of shear gravity ratio were analyzed. The structural periods, design characteristic period of ground motion influence much while damping ratio influence little for little varying for general super high-rise structures. Methods to increase shear gravity ratio were introduced. Some suggestions to modify shear gravity ratio limit were introduced, such as-changing limit value according to different site, or decreasing the limit value for super high-rise structures higher than 500 meters.Keywords: super high-rise building; seismic shear gravity ratio; limit; fundamental period; design characteristic period of ground motion*上海市科技人才計劃項目（10QB1400300）。作者簡介：汪大綏，國家勘察設(shè)計大師，教授級高工，Email:dasui_wang@ecadi.com。參考文獻［1］ 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.［2］ JGJ 3—2010 高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程［S］. 北京：中國建筑工業(yè)出版社，2011.［3］ 國家標準建筑抗震設(shè)計規(guī)范管理組. 建筑抗震設(shè)計規(guī)范（GB 50011—2010）統(tǒng)一培訓(xùn)教材［M］. 北京：中國建筑工業(yè)出版社，2010.［4］ 易方民，高小旺，蘇經(jīng)宇. 建筑抗震設(shè)計規(guī)范理解與應(yīng)用［M］. 2版.北京：中國建筑工業(yè)出版社，2011.
