結合振動臺試驗的鋼框架-支撐體系抗震性能研究*
姜忻良, 韓陽
- 摘 要
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(天津大學建筑工程學院/濱海土木工程結構與安全教育部重點實驗室（天津大學）, 天津 300072)［摘要］鑒于天津圖書館結構布置的復雜性，為研究其抗震性能，進行了振動臺試驗，并與數值模擬進行了比較分析。通過相似關系原理的有關公式將試驗數據推算成原型結構相應數據，將數值模擬分析與試驗值推算的結構動力特性參數進行了對比，說明采用大比例模型試驗能給原型結構動力特性試驗推算值的合理性與可靠性帶來保證。同時對原型結構的頻率、不同工況下結構進入塑性的程度等進行了分析，并將原型結構的層間位移角與抗規(guī)的有關規(guī)定進行對比，原型結構的抗震性能均符合抗規(guī)有關要求且安全儲備高。［關鍵詞］振動臺試驗;加速度放大系數;試驗推算值;層間位移角;鋼框架;阻尼比中圖分類號：TU391，P315.8 文獻標識碼：A 文章編號：1002-848X(2015)10-0001-04Seismic performance study of braced steel frame system based on shaking table testJiang Xinliang, Han Yang(School of Civil Engineering, Tianjin University／Key Laboratory of Coastal CivilEngineering Structure and Safety (Tianjin University), Ministry of Education, Tianjin 300072, China)Abstract: In view of the complexity of Tianjin library structural layouts, in order to study the seismic performance, shaking table tests were conducted, and the results were compared with numerical simulation results. The test data were made into the corresponding prototype structure data according to the similarity relation formula. The numerical simulation analysis results and the calculated values of prototype structure data from the test value were compared, which shows that the large-scale model test brings rationality and reliability assurance to the calculation values of dynamic characteristics test for prototype structure. The frequency and the plastic degree under different working conditions of prototype structure were analyzed. The interlayer displacement angle of prototype structure was also compared with the relevant requirements of the currentCode for seimic design of buildings. Results show that the seismic performance of the prototype structure meets the requirements of Code for seimic design of buildings with large safety stock.Keywords:shaking table test; acceleration amplification factor; calculated value of test; interlayer displacement angle; steel frame; damping ratio*國家自然科學基金項目(51278335)，國家青年科學基金項目(51208356)。作者簡介：姜忻良，博士，教授，博導，Email:jiangxinliang@126.com。參考文獻［1］YU HAIFENG, ZHANG WENYUAN, ZHANG YAOCHUN et al. Shaking table test and numerical analysis of a 1∶12 scale model of a special concentrically braced steel frame with pinned connections［J］.Earthquake Engineering and Engineering Vibration，2010，9（1）：51-63.［2］李岳,姜忻良.土與結構相互作用振動臺試驗模型土設計方法分析［J］.工程力學,2010, 27(1): 73-76.［3］石啟印,李愛群,李培彬,等.北京機場新塔臺結構振動臺試驗研究［J］.工業(yè)建筑，2004,34（9）：40-45.［4］季靜,趙書寧,韓小雷,等.復雜高層建筑的模擬地震振動臺試驗［J］.華南理工大學學報:自然科學版,2007,35(3):83-89.［5］TSAI C S, LIN YUNGCHANG. Mathematical modeling and full-scale shaking table tests for multi-curve buckling restrained braces［J］. Earthquake Engineering and Engineering Vibration，2009，8（3）：359-372.［6］呂西林,程海江,盧文勝,等.兩層輕型木結構足尺房屋模型模擬地震振動臺試驗研究［J］.土木工程學報,2007,40（10）：41-49.［7］鄧振丹.復雜鋼框架-支撐體系結構振動臺試驗研究及有限元模擬［D］.天津:天津大學,2011.［8］周穎,呂西林,盧文勝.不同結構的振動臺試驗模型等效設計方法［J］.結構工程師,2006,22(4):37-40.［9］鄒昀,呂西林,錢江.上海環(huán)球金融中心大廈結構抗震性能研究［J］.建筑結構學報,2006,27（6）：74-80.［10］GB 50011—2010 建筑抗震設計規(guī)范［S］. 北京:中國建筑工業(yè)出版社,2010.
