溫度及收縮作用下超長隔震結構的變形分析
黨育，劉營科
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黨育，劉營科(蘭州理工大學土木學院， 蘭州 730050)［摘要］針對超長隔震結構在溫度和收縮效應下的變形問題，實測一個長94.2m的隔震工程，發(fā)現(xiàn)該結構在施工期間，部分隔震支座的變形超過安裝容許誤差。用變形分配法求得該結構在年溫差和收縮效應下的變形。結果表明，層間變形主要集中在隔震層處，端部隔震支座的變形最大，且與實測數(shù)據(jù)相比，計算結果偏于保守。由此以最不利隔震支座在溫度和收縮作用下的變形滿足容許位移的要求，按建筑物的熱工設計區(qū)域和建筑使用情況，給出了鋼筋混凝土框架隔震結構伸縮縫間距。［關鍵詞］超長隔震結構； 溫度作用； 收縮效應； 變形； 伸縮縫中圖分類號：TU311 文獻標識碼：A 文章編號：1002-848X(2013)13-0042-04Deformation analysis of overlong isolated buildings due to temperature and shrinkage effectsDang Yu, Liu Yingke(School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China)Abstract: As to the deformation of overlong isolated buildings under temperature and shrinkage effects, a 94.2m isolated building was tested, in which the deformation of some isolators was found to exceed installing allowed deviation in construction. Deformation distribution method was used to calculate the deformation due to annual temperature variation and concrete shrinkage. Results show that the drift is concentrated in the isolated layers and the deformation of the end isolator is the largest.Compared with the tested results,the calculated results are conservative. According to the control of maximum deformation of isolated layers under temperature and concrete shrinkage, the distance of expansion joints of the reinforced concrete frame isolated buildings were proposed according to the buildings thermal design region and architectural functions.Keywords: overlong isolated building; temperature; shrinkage; deformation; expansion joint作者簡介：黨育，博士，副教授，Email:601363791@qq.com。參考文獻［1］王琦明,黎海南,李慧，等. 超長混凝土基礎隔震結構溫度應力分析［J］. 工程抗震與加固改造, 2010,32(5):116-120.［2］施衛(wèi)星, 孫黃勝,李振剛. 上海國際賽車場新聞中心高位隔震研究［J］. 同濟大學學報：自然科學版, 2005, 33(12):1576-1580.［3］王可怡, 陳大賓, 郭曼麗,等. 隔震支座在鋼結構施工過程中的變形與服役監(jiān)測［J］. 建筑結構, 2010, 30(8):21-25.［4］GB 50011—2010建筑抗震設計規(guī)范［S］. 北京:中國建筑工業(yè)出版社, 2010.［5］王鐵夢. 工程結構裂縫控制［M］.北京:中國建筑工業(yè)出版社,1997.［6］GB 50010—2010混凝土結構設計規(guī)范［S］. 北京: 中國建筑工業(yè)出版社, 2011.［7］GB 20688.3—2006 橡膠支座 第3部分：建筑隔震橡膠支座［S］.北京: 中國建筑工業(yè)出版社, 2006.［8］GB 50176—93民用建筑熱工設計規(guī)范［S］.北京:中國建筑工業(yè)出版社, 1993.
