帶楔塊裝置鋼柱腳恢復(fù)力特性試驗
雷勁松1,2，姚勇2，盧學(xué)松2，高松隆夫3，鄒銀生1
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（1 湖南大學(xué)土木工程學(xué)院，長沙 410082； 2 西南科技大學(xué)土木工程與建筑學(xué)院，綿陽 621010； 3 廣島工業(yè)大學(xué)建設(shè)工學(xué)科，廣島 731-5193）［摘要］為避免鋼結(jié)構(gòu)露出型柱腳在地震中發(fā)生破壞，研究一種新的減震裝置。該裝置通過楔塊滑動、彈簧變形和螺桿的塑性伸長來控制柱腳位移，同時消耗地震能量，達到消能減震的效果。采用方形空心鋼管柱，分別對普通螺栓柱腳和帶減震裝置的柱腳進行低周往復(fù)加載試驗，研究其恢復(fù)力特性。試驗表明：普通螺栓連接的柱腳呈滑移型滯回特征；由于彈簧恢復(fù)和楔塊切入，新型柱腳連接每次加載卸載均以原點為始終，呈無滑移型滯回特征。根據(jù)試驗結(jié)果，得到了帶楔塊裝置鋼柱腳的無滑移型恢復(fù)力模型。研究結(jié)果表明，無滑移型減震連接的鋼柱腳具有良好的抗震性能且簡單易用。［關(guān)鍵詞］鋼柱腳；楔塊裝置；恢復(fù)力特性；反復(fù)加載試驗；消能減震中圖分類號：TU392，TU3171文獻標(biāo)識碼：A文章編號：1002-848X(2011)08-0083-04Experimental study on restoring force characteristics of steel column base with wedge deviceLei Jinsong1,2, Yao Yong2, Lu Xuesong2, Takao Takamatsu3, Zou Yinsheng1(1 College of Civil Engineering, Hunan University, Changsha 410082， China; 2 College of Civil Engineering andArchitecture, Southwest University of Science and Technology, Mianyang 621010, China; 3 Department of Civil andArchitectural Engineering,Hiroshima Institute of Technology, Hiroshima 731-5193, Japan）Abstract:A new isolation device was designed to avoid damage of steel exposed-column base in earthquake, which consists of a wedge compressed by a spring and a counter-wedge. By the plastic elongation of the anchor bolt, the deformation of the spring and the slip of the wedge, the device can effectively dissipate the earthquake energy and control the damage of the structure. Dynamic cyclic test was performed to study the hysteretic behaviors of steel exposed-column base with and without the device. The results show that the ordinary column base is observed to be slip-type due to a gap between the nut of the anchor bolt and the base plate, caused by the plastic elongation of the anchor bolt. The new isolation column base is observed to be non-slip-type due to the gap which can be eliminated by use of the new device. Based on test results, a new non-slip-type hysteretic model is proposed. The results show that this device provides a better seismic performance and can be used conveniently.Keywords:steel column base; wedge devices; hysteretic behaviors; cyclic loading test; energy dissipation*國家高技術(shù)研究發(fā)展計劃項目(2009AA032304)，國家自然科學(xué)基金項目(50848008)。作者簡介：雷勁松，博士研究生，教授，Email:leijinsong@swust.edu.cn。參考文獻［1］王秀麗, 沈世釗. 輕鋼結(jié)構(gòu)在房屋增層改造中的應(yīng)用［J］. 蘭州理工大學(xué)學(xué)報, 2004, 30(1): 97-100.［2］CHEN SHENJIN,TU CHINTE.Experimental study of size reduced beam section connections using high-strength steel［J］. Structure Eng.， ASCE,2004,13(4):582-587.［3］FEMA-355D. State of the art report on connection per formance of steel moment frames subject to earthquake ground shaking［R］. Prepared by the SAC Joint Venture for the Federal Emergency Agency,Washington D C,2000.［4］NAKASHIMA M, INOUE K,TADA M.Classification of damage to steel buildings observed in the 1995 Hyogoken-Nanbu earthquake［J］.Engineering Structures,1998,20(4-6):271-281.［5］于安麟,永毓棟,郭在田,等.露出型鋼柱腳抗剪性能研究(I)［J］.工業(yè)建筑,1992（5）:24-27.［6］于安麟,永毓棟,郭在田,等.露出型鋼柱腳抗剪性能研究(Ⅱ)［J］.工業(yè)建筑,1992（6）:29-33.［7］陳富生,邱國樺,范重.高層建筑鋼結(jié)構(gòu)設(shè)計［M］.北京:中國建筑工業(yè)出版社,2000.［8］姚謙峰,陳平.土木工程試驗［M］.北京:中國建筑工業(yè)出版社,2001.［9］JGJ101—96 建筑抗震試驗方法規(guī)程［S］.北京:中國建筑工業(yè)出版社,1996.［10］董旭華. GFRP加固鋼筋混凝土橋梁短柱抗震性能研究［D］.長沙：湖南大學(xué),2006.［11］陳宏,李兆凡,石永久,等. 鋼框架梁柱節(jié)點恢復(fù)力模型的研究［J］. 工業(yè)建筑,2002,32(6):64-66.［12］陳杰,蘇明周.鋼結(jié)構(gòu)焊接翼緣板加強式梁柱剛性連接滯回性能試驗研究［J］. 建筑結(jié)構(gòu)學(xué)報,2007,28(3):1-7.［13］TAKAMATSU T, TAMAI H, YAMANISHI T, et al. Models of restoring force characteristics for exposed column base with wedge device［C］//Proceedings of 3rd International Symposium on Steel Strures,2005,39(1):39-48.［14］TAKAMATSU T, TAMAI H. Non-slip-type restoring force characteristics of an exposed-type column base［J］.Journal of Constructional Steel Research, 2005,61(9): 42-61.［15］雷勁松,王汝恒,楊東升,等. 非滑動型連接鋼框架抗沖擊性能研究［J］. 解放軍理工大學(xué)學(xué)報, 2007,8(6): 669-673.［16］馬人樂,柳勝華,姚金滿.門式剛架輕型鋼結(jié)構(gòu)工業(yè)廠房柱腳抗剪試驗研究與理論分析［J］.建筑結(jié)構(gòu)學(xué)報,2004,25(2):15-18.
