建筑结构非线性阻尼及其振动反应研究
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摘要
在分析了建筑物实测阻尼比的变化规律的基础上,探讨了建筑结构非线性阻尼产生的机理,并采用数值方法分析了单自由度非线性阻尼结构在不同荷载条件下的振动反应,分析结果说明:非线性阻尼结构地震反应与常阻尼比结构地震反应差异较大,采用常阻尼比(5%)进行建筑物地震反应分析可能产生不安全的结果.
After investigating the development trend of damping ratio of building,this paper discussed the mechanism of non-linear damping and analyzed the dynamic responses of Single Degree of Freedom(SDOF) with non-linear damping ratio under various loads by numerical method.The research results indicated that the dynamic responses between non-linear damping structures and constant damping structures were quite different,and unsafe results would be obtained with constant damping ratio(5%) model.
After investigating the development trend of damping ratio of building,this paper discussed the mechanism of non-linear damping and analyzed the dynamic responses of Single Degree of Freedom(SDOF) with non-linear damping ratio under various loads by numerical method.The research results indicated that the dynamic responses between non-linear damping structures and constant damping structures were quite different,and unsafe results would be obtained with constant damping ratio(5%) model.
引文
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[20]刘铁军,欧进萍.水泥砂浆强度和阻尼增强掺料及试验[J].低温建筑技术,2003(1):8-10.LIU T J,OU Jinpin.Reinforcing Admixtures and Their Effective-ness Experiments for Strength and Damping of Cement MortarComponents[J].Technology of Low Temperature Building,2003(1):8-10.(In Chinese)
[2]中华人民共和国国家标准.建筑抗震设计规范.GB50011-2001[S].北京:中国建筑工业出版社,2001.State Standard of PRC.Code for Aseismic Design of Building.GB50011-2001[S].Beijing:China Construction IndustryPress,2001.(In Chinese)
[3]杨志勇,李桂青,瞿伟廉.结构阻尼的发展及其研究近况[J].武汉工业大学学报,2000,22(3):38-41.YANG Z Y,LI G Q,QU W L.The Research History and RecentDevelopment of Structural Damping[J].Journal of Wuhan Uni-versity of Technology,2000,22(3):38-41.(In Chinese)
[4]张相庭.结构阻尼耗能假设及在振动计算中的应用[J].振动与冲击,1982,1(2):12-21.ZHANG S T.The Assumption on Energy Dissipation of StructureDamping and The Application in Vibrational Computing[J].Vi-bration and Impact,1982,1(2):12-21.(In Chinese)
[5]康希良.有机玻璃结构模型阻尼系数的试验确定及分析[J].兰州铁道学院学报,1994,13(4):8-13.KANG X L.Experiment Determination and Analysis on DampingCoefficient of Organic Glass Structure Model[J].Journal ofLanzhou Railway Institute,1994,13(4):8-13.(In Chinese)
[6]LI Q S,FANG J Q,JEARY A P,et al.Evaluation of Wind Ef-fects on a Supertall Building Based on Full-scale Mmeasurements[J].Earthquake Engineering and Structural Dynamics,2000,29:1845-1862.
[7]JEARY A P.Damping in structures[J].Journal of Wind Engi-neering and Industrial Aerodynamics,1997,72:345-355.
[8]TAMURA Y,SUGANUMA S Y.Evaluation of Amplitude-de-pendent Damping and Natural Frequency of Buildings DuringStrong Winds[J].Journal of Wind Engineering and IndustrialAerodynamics,1996,59:115-130.
[9]LI Q S,XIAO Y Q,WONG C K,et al.Field measurements ofTyphoon Effects on a Super Tall Building[J].Engineering Struc-tures,2004,26:233-244.
[10]JEARY A P.The Description and Measurement of NonlinearDamping in Structures[J].Journal of Wind Engineering and In-dustrial Aerodynamics,1996,59:103-114.
[11]LI Q S,LIU D K,FANG J Q,et al.Damping in Buildings:ItsNeural Network Model and AR Model[J].Engineering Struc-tures,2000,22:1216-1223.
[12]LI Q S,FANG J Q,JEARY A P,et al.Full Scale Measurementsof Wind Effects on Tall Buildings[J].Journal of Wind Engineer-ing and Industrial Aerodynamics,1998,74-76:741-750.
[13]FANG J Q,JEARY A P,LI Q S,et al.Random Damping inBuildings and its AR Model[J].Journal of Wind Engineering andIndustrial Aerodynamics,1999,79:159-167.
[14]LI Q S,YANGA K,WONG C K,et al.The Effect of Ampli-tude-dependent Damping on Wind-induced Vibrations of a SuperTall Building[J].Journal of Wind Engineering and IndustrialAerodynamics,2003,91:1175-1198.
[15]JEARY A P.Damping in Structures[J].Journal of Wind Engi-neering and Industrial Aerodynamic,1997,72:345-355.
[16]樊海涛,何益斌,肖宏彬.钢筋混凝土建筑非线性阻尼性能及阻尼比表达式研究[J].地震工程与工程振动,2005,25(5):85-90.FAN H T,HE Y B,XIAO H B.Study on Non-linear DampingPerformance and Expression of Damping Ratio of RC Structure[J].Earthquake Engineering and Engineering Vibration,2005,25(5):85-90.(In Chinese)
[17]柯国军,郭长青,胡绍全,等.混凝土阻尼比研究[J].建筑材料学报,2004,7(1):35-40.KE G J,GUO C Q,HU S Q.Study on the Damping Ratio ofConcrete[J].Journal of Building Materials,2004,7(1):35-40.(In Chinese)
[18]比尔兹C F.结构振动分析(振动结构的模型、分析和阻尼)[M].北京:中国铁道出版社,1998.BILLTH C F.Analysis in Structure Vibration(Model,Analysisand Damping of Vibration Structure)[M].Beijing:China Rail-way Press,1998.(In Chinese)
[19]黄崇明.结构地震反应时程分析中的阻尼研究[D].重庆建筑大学土木学院,1995.HUANG Z M.An Investigation of Damping in Earthquake Re-sponse Time History Analysis of Structures[D].College of CivilEngineering of Chongqing Jianzhu University,1995.(In Chinese)
[20]刘铁军,欧进萍.水泥砂浆强度和阻尼增强掺料及试验[J].低温建筑技术,2003(1):8-10.LIU T J,OU Jinpin.Reinforcing Admixtures and Their Effective-ness Experiments for Strength and Damping of Cement MortarComponents[J].Technology of Low Temperature Building,2003(1):8-10.(In Chinese)
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