防屈曲支撐在超高層建筑結(jié)構(gòu)伸臂桁架中的應(yīng)用
任重翠，徐自國，肖從真，孫建超，金林飛，高杰
- 摘 要
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任重翠，徐自國，肖從真，孫建超，金林飛，高杰（中國建筑科學(xué)研究院， 北京 100013）［摘要］帶加強(qiáng)層的超高層建筑結(jié)構(gòu)多采用伸臂桁架結(jié)構(gòu)形式。出于提高結(jié)構(gòu)抗震性能的需要，工程中常采用拉壓性能穩(wěn)定的防屈曲支撐代替易失穩(wěn)的普通鋼支撐作為伸臂桁架的斜腹桿。采用有限元分析軟件ABAQUS的動(dòng)力彈塑性分析方法，比較了某超高層結(jié)構(gòu)分別采用防屈曲支撐和普通鋼支撐作為伸臂桁架斜腹桿，在設(shè)防烈度和超烈度罕遇地震作用下的結(jié)構(gòu)變形特征、構(gòu)件內(nèi)力及剪力墻損傷等非線性動(dòng)力響應(yīng)。分析結(jié)果表明，與普通鋼支撐相比，防屈曲支撐剛度和強(qiáng)度指標(biāo)易控制，大變形下滯回性能穩(wěn)定，罕遇地震作用下能率先屈服吸收地震能量，抗震性能良好。［關(guān)鍵詞］超高層建筑結(jié)構(gòu)； 防屈曲支撐； 動(dòng)力彈塑性分析； 抗震性能中圖分類號(hào)：TU973.2 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2013)05-0054-06Application of unbonded brace in super high-rise structure with cantilever trussRen Chongcui, Xu Ziguo, Xiao Congzhen, Sun Jianchao, Jin Linfei, Gao Jie(China Academy of Building Research, Beijing 100013, China)Abstract: Cantilever truss was often adopted for super high-rise structure with the strengthening layer. Because of the stable tension and compression performance, unbonded braces were widely accepted in projects to replace the ordinary steel supports to increase structure seismic performance. Nonlinear time-history analysis method by software ABAQUS was used to analyze the seismic performance of structure with unbonded braces or ordinary steel supports under the rare earthquake, including the deformation, member force and shear wall damage etc. The results show that compared with the ordinary steel supports, the unbonded braces have good seismic performance, and the stiffness and strength can be easily controlled. Hysteretic behaviors are stable under large deformation,and can absorb the seismic energy firstly under the rare earthquake.Keywords: super high-rise structure; unbonded brace; nonlinear time-history analysis; seismic performance作者簡介：任重翠,碩士,工程師，Email:renchongcui@yahoo.cn。參考文獻(xiàn)［1］徐培福，傅學(xué)怡，王翠坤，等. 復(fù)雜高層建筑結(jié)構(gòu)設(shè)計(jì)［M］. 北京：中國建筑工業(yè)出版社，2005.［2］傅學(xué)怡. 實(shí)用高層建筑結(jié)構(gòu)設(shè)計(jì)［M］. 北京：中國建筑工業(yè)出版社，2010.［3］汪家銘，中島正愛. 屈曲約束支撐體系的應(yīng)用與研究進(jìn)展(I) ［J］. 建筑鋼結(jié)構(gòu)進(jìn)展, 2005,7(1):1-12.［4］武蓮霞，余志偉，孫飛飛. 屈曲約束支撐在帶伸臂高層建筑中的應(yīng)用［J］. 建筑結(jié)構(gòu), 2011, 41(S1):120-124.［5］趙俊賢，吳斌，歐進(jìn)萍. 新型全鋼防屈曲支撐的擬靜力滯回性能試驗(yàn)［J］. 土木工程學(xué)報(bào), 2011, 44(4):60-70.［6］徐自國，張莉若，黃小坤，等.鄭州國家干線物流港綜合樓工程的動(dòng)力彈塑性分析［C］//第二十屆全國高層建筑結(jié)構(gòu)學(xué)術(shù)會(huì)議. 2008:573-584.［7］任重翠，杜義欣，徐自國，等.南京德基廣場二期塔樓結(jié)構(gòu)動(dòng)力彈塑性分析及抗震性能評(píng)價(jià)［C］//第二十一屆全國高層建筑結(jié)構(gòu)學(xué)術(shù)會(huì)議. 2010:754-760.
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