現(xiàn)行建筑抗震設計規(guī)范多高層鋼結(jié)構(gòu)梁柱剛性連接設計方法的技術(shù)矛盾
劉其祥1，陳幼1，陳青來2
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(1 中國建筑標準設計研究院，北京 100044； 2 山東大學，濟南 250061)［摘要］對我國現(xiàn)行《建筑抗震設計規(guī)范》中關于多高層鋼結(jié)構(gòu)房屋梁柱剛性節(jié)點連接的設計規(guī)定進行了深層次分析，指出該規(guī)定與同一規(guī)范第5.4.2條的“強連接”要求存在矛盾。在相同設計條件下按照規(guī)范的規(guī)定做多遇地震作用下的連接設計時，可分別設計出三種抗震性能相差懸殊的連接作法。按照規(guī)范公式Mu≥1.2Mp進行中震或大震作用下彈塑性階段的抗震連接計算時，得出的結(jié)果卻不能滿足抗震要求，存在安全隱患。為了確保滿足規(guī)范第5.4.2條應實現(xiàn)“強連接”的抗震設計強制性條文規(guī)定，提出了相應解決方案，針對所討論的問題進一步推出幾種耐震型連接節(jié)點作法和相應的計算方法，推薦了既有良好抗震性能又較符合我國國情的新型節(jié)點形式。［關鍵詞］小震；地震組合內(nèi)力設計值；梁柱剛性連接節(jié)點；構(gòu)件；承載力抗震調(diào)整系數(shù)；延性Contradictions in current Code for Seismic Design of Buildings about beam-column rigid joint design of high-rise steel structuresLiu Qixiang1, Chen Youfan1, Chen Qinglai2(1 China Institute of Building Standard Design & Research,Beijing 100044,China；2 Shandong University,Jinan 250061,China)Abstract:The stipulations about the beam-column rigid joint of high-rise steel structures are deeply analyzed in Code for Seismic Design of Buildings(GB50011—2001). It is pointed out that there are contradictions between the stipulations and the term 5.4.2 of demanding “strong joint” in the code. Under the “lower” level earthquake action, according to the stipulation there are three design results with great disparity, and two results of these are unsafety. When taking the code formula Mu≥1.2Mp to calculate the joint at the elastoplastic condition on the “middle” or “great” level earthquake action, the results are not satisfied the demand of seismic. In order to guarantee satisfying the mandatory seismic term 5.4.2 of “strong joint”, the suggestions are put forward.Keywords:“lower” level earthquake; design value of assembled interior seism forces; steel frame; beam-column rigidity joint; member; anti-seismic bearing capacity factor; ductility作者簡介：劉其祥，教授級高工，Email:lqx3960@sina.com。參考文獻［1］GB50011—2001建筑抗震設計規(guī)范［S］.2008版.北京：中國建筑工業(yè)出版社，2008.［2］TAMBOLL A R，F(xiàn)ASCE P E. Handbook of structural steel construction design and details［M］.McGraw. Hill.2000.［3］JCJ99—98高層民用建筑鋼結(jié)構(gòu)技術(shù)規(guī)程［S］.北京：中國建筑工業(yè)出版社，1998.［4］劉大海，楊翠如，鐘錫根.高層建筑抗震設計［M］.北京：中國建筑工業(yè)出版社，1993.［5］劉其祥.多高層房屋鋼結(jié)構(gòu)梁柱剛性節(jié)點的設計建議［J］.建筑結(jié)構(gòu)，2003，33(9).［6］崔佳，魏明鐘.鋼結(jié)構(gòu)設計規(guī)范理解與應用［M］.北京：中國建筑工業(yè)出版社，2004.
