轻钢增层房屋阻尼比确定的能量法
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摘要
阻尼比是反映结构耗能能力的参数,对结构的振动反应有着重要影响。目前结构设计阶段通常取阻尼比为常数,这不能真实反映建筑物的阻尼机理,与阻尼比的实测结果也有很大的差距。本文基于复阻尼理论,采用能量法推导了增层房屋任意振型阻尼比的计算公式,提出了地震反应谱的修正方法,并利用Matlab工具语言编制程序对此方法进行实现。最后,通过对一个数值算例结果的分析,验证了本文方法的可行性和实用性。
Damping ratio,as a parameter that reflects capacity of dissipating energy of building and has significant influence on the dynamic responses,is regard as a constant when designing buildings at present.It is not consistent with damping mechanism and full-scale data of damping ratio of buildings.Based on the complex damping theory and the energy method,the calculation formula of the damping ratio for different vibration mode is given,and the revising method of the seismic response spectrum of the building added storey is presented.The method of this paper is feasible and practical according to the analysis of the numerical example.
Damping ratio,as a parameter that reflects capacity of dissipating energy of building and has significant influence on the dynamic responses,is regard as a constant when designing buildings at present.It is not consistent with damping mechanism and full-scale data of damping ratio of buildings.Based on the complex damping theory and the energy method,the calculation formula of the damping ratio for different vibration mode is given,and the revising method of the seismic response spectrum of the building added storey is presented.The method of this paper is feasible and practical according to the analysis of the numerical example.
引文
[1]GB50011-2001,建筑抗震设计规范[S]
[2]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,2000,20(3):38~48
[3]Kenichi Suda,Naoki Satake,Junichiro Ono,et al.Properties of buildings in Japan[J].Journal of WindEngineering and Industrial Aerodynamics.1996,59,383~392
[4]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
[5]石建军,胡绍全,柯国军,等.钢筋混凝土材料阻尼值的实验研究[J].四川建筑科学研究,2003,29(3):14~15
[6]尚世英,董至仁.钢筋混凝土构件阻尼值实验研究[J].工程抗震,1993,(4):18~19
[7]Binggeng,Pedro F Silva.Estimating equivalent viscousdamping rario fou RC members under seismic and blastloadings[J].Mechanics Research Communications.2006,33,787~795
[8]Naoki Satake,Ken-ichi Suda,Toshiharu Arakawa,et al.Damping evaluation using full-scale data of buildings inJapan[J].Journal of Structure Engineering(ASCE).2003,129(4):1~470~477
[9]Li Q S,Yang Ke,Wong C K.,et al.The effect ofamplitude-dependent damping on wind-induced vibrations ofa super tall building[J].Journal of Wind Engineering andIndustrial Aerodynamics.2003,91:1175~1198
[10]胡聿贤.地震工程学[M].北京:地震出版社,2006
[2]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,2000,20(3):38~48
[3]Kenichi Suda,Naoki Satake,Junichiro Ono,et al.Properties of buildings in Japan[J].Journal of WindEngineering and Industrial Aerodynamics.1996,59,383~392
[4]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
[5]石建军,胡绍全,柯国军,等.钢筋混凝土材料阻尼值的实验研究[J].四川建筑科学研究,2003,29(3):14~15
[6]尚世英,董至仁.钢筋混凝土构件阻尼值实验研究[J].工程抗震,1993,(4):18~19
[7]Binggeng,Pedro F Silva.Estimating equivalent viscousdamping rario fou RC members under seismic and blastloadings[J].Mechanics Research Communications.2006,33,787~795
[8]Naoki Satake,Ken-ichi Suda,Toshiharu Arakawa,et al.Damping evaluation using full-scale data of buildings inJapan[J].Journal of Structure Engineering(ASCE).2003,129(4):1~470~477
[9]Li Q S,Yang Ke,Wong C K.,et al.The effect ofamplitude-dependent damping on wind-induced vibrations ofa super tall building[J].Journal of Wind Engineering andIndustrial Aerodynamics.2003,91:1175~1198
[10]胡聿贤.地震工程学[M].北京:地震出版社,2006
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