- 摘 要
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（1 東南大學土木工程學院， 南京 210096； 2 華東建筑設(shè)計研究總院，上海 200002;3 南京市建筑設(shè)計研究院有限責任公司， 南京 210014）
［摘要］針對南京華新城塔樓東側(cè)中柱不能落至底部的特點，在四至七層設(shè)置跨越三層的轉(zhuǎn)換層。轉(zhuǎn)換層的斜柱與框架柱相交處經(jīng)設(shè)計采用鑄鋼節(jié)點連接。鑄鋼節(jié)點外形不規(guī)則、受力復雜，為了驗證其安全性及合理性，設(shè)計了兩個1∶2縮尺節(jié)點模型并進行了三種不同工況下的靜載試驗，同時基于試驗并利用ABAQUS建立了節(jié)點有限元模型對其進行了有限元分析。節(jié)點模型的試驗值與有限元分析結(jié)果吻合良好，表明此節(jié)點有限元模型能夠真實模擬節(jié)點模型的邊界條件和受力狀態(tài)，因此在不改變有限元模型的邊界條件及荷載施加方式等計算條件的基礎(chǔ)上，對工程實際足尺節(jié)點進行了有限元分析。結(jié)果表明：實際足尺節(jié)點能夠滿足設(shè)計承載能力要求，節(jié)點內(nèi)填混凝土能夠顯著提高鑄鋼節(jié)點的強度與剛度，節(jié)點具有較大的安全裕量。
［關(guān)鍵詞］鑄鋼節(jié)點； 轉(zhuǎn)換層； 大比例縮尺節(jié)點試驗； 有限元分析
中圖分類號：TU391文獻標識碼：A文章編號：1002-848X(2018)22-0001-06
Experimental research on the cast steel joint used in the transfer floor of a tower in Nanjing Walsin City
Zhang Yizhou1， Shu Ganping1， Liu Zhen2， Lu Jianfeng3
（1 School of Civil Engineering, Southeast University, Nanjing 210096, China；2 East China Architectural Design & Research Institute, Shanghai 200002, China；3 Nanjing Architectural Design & Research Institute Co., Ltd., Nanjing 210014, China）
Abstract:Regarding the feature that the middle columns which are located at the east side of a tower of Nanjing Walsin City cannot reach to the ground, a transfer floor that strides across three storeys is set up from the 4th floor to the 7th floor. Cast steel joints were designed and applied to connecting inclined columns of the transfer floor with frame columns. In order to verify cast steel joints′ safety and rationality owing to their irregular shape and complex mechanics performance, experimental research under static load in 3 different working conditions on 2 half-scale joint models was carried out. Meanwhile, FEM models based on the experiment were analyzed by ABAQUS. Experimental results agreed well with the results of FEM analyses, which indicates that the FEM models could truly simulate boundary condition and stress state of the actual joint. Hence, FEM analysis on the actual full-scale joint were carried out while remaining the calculation condition such as boundary condition and load application of FEM models unchanged. The results indicate that the actual full-scale joint can meet the design requirement of bearing capacity. Moreover, concrete filled in the joint can improve the strength and stiffness of cast steel joint remarkably and the joint possesses superior safety margin.
Keywords:cast steel joint; transfer floor; reduced-scale experiment in large proportion; FEM analysis
通訊作者：舒贛平，博士，教授，博士生導師，Email：sgp0818@vip.sina.com。
