结构附设粘滞阻尼器的支撑刚度取值范围研究
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摘要
综合考虑粘滞阻尼器减震装置参数(阻尼系数c_d、速度指数α_0)、结构非线性(强度折减系数R、结构屈服后与屈服前刚度之比α_1)等因素,分别建立弹性和弹塑性SDOF体系计算模型,系统研究了粘滞阻尼器支撑刚度k_b的变化对结构地震响应的影响规律,并建议了k_b的最小取值范围,最后通过具体算例验证了其适用性和准确性。该建议可供设计人员在采用非线性粘滞阻尼器进行减震结构设计时参考。
In this paper, the calculation models of elastic and elastoplastic SDOF systems were established to investigate the influence of the nonlinear fluid viscous dampers'( FVDs) bracing stiffness k_b on the structure seismic response. In the study, the effects of parameters of viscous dampers including damping coefficient c_d,velocity index α_0 and structural nonlinearity parameters including strength reduction factor R, the post-yield stiffness ratio α_1 were all considered. Furthermore, the minimum value range of k_b was suggested. Finally, the applicability and accuracy of the k_b range were verified by a realistic example. This recommendation is beneficial for anti-seismic design using nonlinear viscous dampers.
In this paper, the calculation models of elastic and elastoplastic SDOF systems were established to investigate the influence of the nonlinear fluid viscous dampers'( FVDs) bracing stiffness k_b on the structure seismic response. In the study, the effects of parameters of viscous dampers including damping coefficient c_d,velocity index α_0 and structural nonlinearity parameters including strength reduction factor R, the post-yield stiffness ratio α_1 were all considered. Furthermore, the minimum value range of k_b was suggested. Finally, the applicability and accuracy of the k_b range were verified by a realistic example. This recommendation is beneficial for anti-seismic design using nonlinear viscous dampers.
引文
[1]GB 50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010GB 50011-2010 Code for seismic design of buildings[S]. Beijing:China Architecture&Building Press, 2010
[2] LOSANNO D, et al. Effective damping and frequencies of viscous damper braced structures considering the supports flexibility[J].Comput Struct, 2017
[3] XU Z, Agrawal A K, He W 1, et al. Performance of passive energy dissipation systems during near-field ground motion type pulses[J]. Eng Struct 2007; 29(2):224-236
[4] CHEN Y, CHAIY H. Effects of brace stiffness on performance of structures with supplemental Maxwell model-based brace-damper systems[J]. Earthquake Engineering&Structural Dynamics,2011,40(1):75-92
[5]欧进萍,吴斌,龙旭.结构被动耗能减振效果的参数影响[J].地震工程与工程振动,1998, 18(1):60-70Ou Jinping, Wu Bin, Long Xu. Parameter analysis of passive energy dissipation systems[J]. Earthquake Engineering and Engineering Vibration, 1998, 18(1):60-70
[6]蒋通,贺磊.非线性粘滞阻尼器消能结构减振效果分析[J].世界地震工程,2005, 21(2):57-63Jiang Tong, He Lei. Analysis of vibration reduction effects for energy dissipation structures with nonlinear viscous dampers[J].World Earthquake Engineering, 2005, 21(2):57-63
[7] Symans M D, Charney F A, Whittaker A S, et al. Energy Dissipation Systems for Seismic Applications:Current Practice and Recent Developments[J]. J Struct Eng(ASCE), 2008, 134(1):3-21
[8] Constantinou MC, Symans MD. Experimental and analytical investigation of seismic response of structures with supplemental fluid viscous dampers[R]. No. NCEER-92-0032. Buffalo,NY:National Center for Earthquake Engineering Research, State University of New York, 1992
[2] LOSANNO D, et al. Effective damping and frequencies of viscous damper braced structures considering the supports flexibility[J].Comput Struct, 2017
[3] XU Z, Agrawal A K, He W 1, et al. Performance of passive energy dissipation systems during near-field ground motion type pulses[J]. Eng Struct 2007; 29(2):224-236
[4] CHEN Y, CHAIY H. Effects of brace stiffness on performance of structures with supplemental Maxwell model-based brace-damper systems[J]. Earthquake Engineering&Structural Dynamics,2011,40(1):75-92
[5]欧进萍,吴斌,龙旭.结构被动耗能减振效果的参数影响[J].地震工程与工程振动,1998, 18(1):60-70Ou Jinping, Wu Bin, Long Xu. Parameter analysis of passive energy dissipation systems[J]. Earthquake Engineering and Engineering Vibration, 1998, 18(1):60-70
[6]蒋通,贺磊.非线性粘滞阻尼器消能结构减振效果分析[J].世界地震工程,2005, 21(2):57-63Jiang Tong, He Lei. Analysis of vibration reduction effects for energy dissipation structures with nonlinear viscous dampers[J].World Earthquake Engineering, 2005, 21(2):57-63
[7] Symans M D, Charney F A, Whittaker A S, et al. Energy Dissipation Systems for Seismic Applications:Current Practice and Recent Developments[J]. J Struct Eng(ASCE), 2008, 134(1):3-21
[8] Constantinou MC, Symans MD. Experimental and analytical investigation of seismic response of structures with supplemental fluid viscous dampers[R]. No. NCEER-92-0032. Buffalo,NY:National Center for Earthquake Engineering Research, State University of New York, 1992