帶轉換層筒中筒結構模型靜力彈性試驗
陳伯望，雷玉成，李頻，黨曉冰
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（中南林業(yè)科技大學土木工程與力學學院， 長沙 410004）
［摘要］制作比例為1∶10的13層帶轉換層的筒中筒結構模型，底部5層為鋼管混凝土框支柱，上部轉換為鋼筋混凝土外框筒，內部為落地鋼筋混凝土核心筒，高位轉換且豎向剛度有突變，模型結構形式比較復雜。為了掌握復雜高層建筑結構的抗震性能，對模型施加不同工況的水平荷載，測試模型在水平荷載作用下的靜力彈性性能。試驗結果表明，豎向荷載能顯著減少結構的側向變形和扭轉變形，水平荷載及偏心距大小與結構的側向變形和扭轉變形基本上呈比例關系，且變形符合疊加原理，結構的剛度突變使結構的側向變形和扭轉變形在轉換層出現(xiàn)明顯拐點。［關鍵詞］鋼管混凝土柱; 框支轉換; 筒中筒結構; 模型試驗; 彈性變形中圖分類號：TU317+.1 文獻標識碼：A 文章編號：1002-848X(2016)09-0048-06
Static elastic experiment of tube-in-tube structural model with transfer storeyChen Bowang, Lei Yucheng, Li Pin, Dang Xiaobing（School of Civil Engineering and Mechanic, Central South University of Forestry and Technology, Changsha 410004, China）Abstract: A 13-storey tube-in-tube structural model with transfer storey was made with scale of 1∶10. The bottom five lays of the model are concrete filled steel tubular frame-supporting columns, and on-ground reinforced concrete corewall is adopted inside. Structural form of the model is complicated because there is high-level transfer and vertical stiffness mutation. In order to master the seismic performance of this complex high-rise building structure, horizontal loadings under different working conditions were exerted on the model to test the static elastic performance of the model under the horizontal loading action. The test results show that vertical loading can reduce lateral displacement and torsion displacement of the structure significantly. The values of horizontal loading and eccentric distance are in proportional relation with lateral displacement and torsion displacement of the structure. The displacement is in accordance with the superposition principle and there appears an obvious inflection point of lateral displacement and torsion displacement in the transfer layer of the structure due to stiffness mutation.Keywords: concrete filled steel tubular column; conversion supported by frame; tube-in-tube structure; model test; elastic displacement
作者簡介：陳伯望，博士，教授，Email：tmcbw@163.com。
