底層框架部分承擔(dān)地震傾覆力矩計(jì)算方法
李楚舒1，李立1，劉春明2，張志國(guó)1
- 摘 要
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（1 北京筑信達(dá)工程咨詢(xún)有限公司，北京 100043；2 CSI公司，伯克利 94704）［摘要］采用現(xiàn)行規(guī)范規(guī)定的公式計(jì)算底層框架部分承擔(dān)的地震傾覆力矩時(shí)存在一定的局限性。討論了規(guī)范公式的限制條件，指出當(dāng)框架與剪力墻之間的相互作用不僅僅是傳遞水平剪力時(shí)，規(guī)范公式將低估框架承擔(dān)的傾覆力矩。根據(jù)力學(xué)和結(jié)構(gòu)知識(shí)，提出了由基底反力的合力矩來(lái)求解傾覆力矩的計(jì)算方法，探討了基底取矩點(diǎn)位置的選取，給出易于操作的計(jì)算公式。最后使用ETABS 2013分析算例，驗(yàn)證規(guī)范公式限制條件的影響，同時(shí)說(shuō)明推薦方法的合理性。［關(guān)鍵詞］傾覆力矩; 計(jì)算方法; ETABS軟件中圖分類(lèi)號(hào)：TU318 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2014)05-0074-04Calculation method for seismic overturning moment carried by the bottom framesLi Chushu1, Li Li1, Liu Chunming2, Zhang Zhiguo1(1 Beijing Construction Information Solution Engineering Consulting, Beijing 100043, China; 2 Computers and Structures Inc., Berkeley 94704, USA)Abstract: The formula in current codes is not suitable for all conditions when calculating seismic overturning moment carried by the bottom frames. The limitation of the code formula was discussed to indicate that the code formula underestimate the overturning moment carried by the bottom frames when the interaction between frame and shear wall was not only the transfer of horizontal shear forces. Therefore, according to the mechanical and structure knowledge, a method was proposed to calculate the overturning moment based on the resultant moment of base reaction. The selection of the location of base moment action point was discussed and the easily handled calculation formula was given. To test the influence of the limitation of the code formula and verify the proposed method, ETABS 2013 was used to analyze the example and the rationality of the proposed method was stated.Keywords: overturning moment; calculation method; ETABS software作者簡(jiǎn)介：李楚舒，博士，教授級(jí)高級(jí)工程師，Email：lics@cisec.cn。參考文獻(xiàn)［1］GB 50011—2010 建筑抗震設(shè)計(jì)規(guī)范［S］. 北京: 中國(guó)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(guó)建筑工業(yè)出版社, 2011.［3］林超偉, 王興法. 底層框支框架部分承擔(dān)的地震傾覆力矩計(jì)算方法分析［J］. 建筑結(jié)構(gòu), 2012, 42(11): 84-86.［4］林同炎，思多臺(tái)斯伯利S D. 結(jié)構(gòu)概念和體系［M］. 王傳志，等，譯.北京: 中國(guó)建筑工業(yè)出版社, 1985.［5］YUAN SI. The finite element method of line ［M］. Beijing: Science Press, 1993.［6］塔拉納特 B S. 高層建筑鋼-混凝土組合結(jié)構(gòu)設(shè)計(jì)［M］. 2版. 羅福午，等，譯.北京: 中國(guó)建筑工業(yè)出版社, 1999.［7］CSI分析參考手冊(cè)［M］. Computers and Structures Inc., 北京筑信達(dá)工程咨詢(xún)有限公司, 2013.
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