某商場連廊前次改造隱患與二次加固設(shè)計(jì)
王鳳來，李利剛，潘景龍
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王鳳來，李利剛，潘景龍（哈爾濱工業(yè)大學(xué)土木工程學(xué)院，哈爾濱 150090）［摘要］某高層商場經(jīng)過改造的連廊失火之后完全損壞，需要重新對該連廊恢復(fù)和增大面積。經(jīng)勘察可知，前次改造存在嚴(yán)重的安全隱患，柱節(jié)點(diǎn)區(qū)附近產(chǎn)生了明顯的損傷，柱混凝土徐變造成柱縱向鋼筋的嚴(yán)重外鼓，柱延性受到較大影響。通過現(xiàn)場檢查和建模計(jì)算，對該高層商場連廊進(jìn)行了二次改造。通過對前次改造中使用的縱向鋼筋上焊接角鋼的加固方法進(jìn)行評價(jià)和分析，認(rèn)識到該方法的不足和造成的安全隱患，并給出了二次改造的加固方法。［關(guān)鍵詞］混凝土徐變；柱加固；植筋；柱延性中圖分類號：TU375-05文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2012)07-0093-04Partially potential safety hazard in previous reforming and second modifying design of a marketWang Fenglai, Li Ligang, Pan Jinglong(School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)Abstract: The original corridor in a high-rise building has been completely damaged after a fire, and a new corridor needs to be reconstructed and the usable floor area can be in creased. There are serious hidden dangers remained from the previous reform through field inspection. Column node neighborhood have significant damage. The reinforcements in the column seriously swelled outside because of concrete creep, which influenced the column ductility. A second reform after the on-site examination and modeling calculation method was proposed. The reinforcing measure of welding steel angle to the rebar was analyzed and the deficiency of this method was well understood. At last, a new column reinforcement method was presented.Keywords: concrete creep; column reinforcement; planting-bar; column ductility作者簡介：王鳳來,博士,教授,博士生導(dǎo)師，Email:wflai@sina.com。參考文獻(xiàn)［1］CECS 252：2009火災(zāi)后建筑結(jié)構(gòu)鑒定標(biāo)準(zhǔn)［S］. 北京：中國計(jì)劃出版社，2009.［2］JGJ/T 23—2001回彈法檢測混凝土抗壓強(qiáng)度技術(shù)規(guī)程［S］北京：中國建筑工業(yè)出版社，2004.［3］GB/T 50344—2004建筑結(jié)構(gòu)檢測技術(shù)標(biāo)準(zhǔn)［S］.北京：中國建筑工業(yè)出版社，2004.［4］MANDER J B, PRIESTLEY M J N, PARK R.Theoretical stress-strain model for confined concrete ［J］. Journal of Structural Engineering, ASCE，1988,114(8):1804-1825.［5］江見鯨，陸新征，葉列平. 混凝土結(jié)構(gòu)有限元分析［M］. 北京：清華大學(xué)出版社，2005.［6］何政，歐進(jìn)萍.鋼筋混凝土結(jié)構(gòu)非線性分析［M］. 哈爾濱：哈爾濱工業(yè)大學(xué)出版社，2007.［7］JGJ 3—2002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，2002.［8］JGJ 145—2004混凝土結(jié)構(gòu)后錨固技術(shù)規(guī)程［S］.北京：中國建筑工業(yè)出版社，2004.［9］GB 50010—2002混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］.北京：中國建筑工業(yè)出版社，2002.［10］GB 50017—2003鋼結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］.北京：中國建筑工業(yè)出版社，2003.
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