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(同濟(jì)大學(xué)  上海 200092)
【提要】  采用近似的線性節(jié)點(diǎn)剛度來(lái)反映連接的非線性彎矩轉(zhuǎn)角關(guān)系，提出了正常使用極限狀態(tài)下半剛性連接無(wú)側(cè)移組合框架梁撓度的簡(jiǎn)化計(jì)算方法。分析常用的幾種線性節(jié)點(diǎn)剛度對(duì)組合框架撓度的影響，給出了可應(yīng)用于實(shí)際設(shè)計(jì)的合理的線性割線剛度模型。通過(guò)與有限元方法計(jì)算結(jié)果比較，表明建議的簡(jiǎn)化方法具有可接受的精確度，而且對(duì)節(jié)點(diǎn)特征的線性簡(jiǎn)化不太敏感。
【關(guān)鍵詞】  撓度  正常使用極限狀態(tài)  無(wú)側(cè)移組合框架  半剛性節(jié)點(diǎn)  簡(jiǎn)化線性節(jié)點(diǎn)剛度
Simple Calculation of Serviceability Deflections of Continuous Beams for Composite Frames with Semirigid Connections/Wang Jingfeng,Li Guoqiang,Liu Qingping(Depart. of Civil Eng.,Tongji University,Shanghai 200092,China)
Abstract:A relativity simple method for calculating the deflections of beams in nonsway  composite frames provided with semirigid beamtocolumn connections is developed.It  approximates the true nonlinear connection momentrotation relation with simplified linear connection stiffness.The effect of several simplified linear  connection stiffness on the composite frames is studied and reasonable linear connection secant  stiffness is suggested.Comparisons with deflection from finite element method show the  proposed method  is  of acceptable accuracy and  is  comparability insensitive to the exact  simplifications made concerning connection characteristics.
Keywords:deflection; serviceability；nonsway composite frames；semirigid connections；simplified linear connection tiffness
*國(guó)家杰出青年科學(xué)基金資助項(xiàng)目(50225825)。