消能减震结构附加金属消能器的简化设计方法
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摘要
金属消能器因其构造简单、施工方便、造价低廉、性能稳定以及便于更换等特点而在工程抗震领域中得到广泛应用,然而对于其应用于结构减震中的设计方法目前仍存在许多问题.针对附加金属消能器减震结构提出一种简化设计方法,该方法假定金属消能器在小震下仅提供附加刚度(即忽略其附加阻尼影响),在中震下基于附加有效刚度的影响来考虑附加阻尼的作用,由此以"小震下基于附加刚度设计、中震下基于附加阻尼设计"为设计理念,并从主体结构与附加消能部件分开设计的思路出发给出具体的设计流程及消能器支撑参数配置公式.最后,通过工程案例分析来证明其可行性及有效性,结果表明该简化设计方法可以契合现行抗震设计规范,并用于结构附加金属消能器的减震设计,以取得良好的减震控制效果.
Metallic damper has been widely applied in seismic design of engineering structures for its advantages of simple mechanism,constructing convenience,lower cost,better performance,and easy to be maintained.However,there are still some controversies in current design procedure of structures with added metallic dampers.Pursuant to this,a simplified design procedure for such damping structures is proposed in this paper,which supposes that the metallic damper can only provide added stiffness(i.e.neglecting its added damping and added mass) under frequently occurred earthquake and then account into its added damping with the impact of added stiffness under precautionary earthquake.The design principle is deemed as "added stiffness-based design under frequently occurred earthquake and added damping-based design under precautionary earthquake",and the specific design process is given with the thought of designing the main structure and energy-dissipating components separately,a series of calculating equations for parameter design of dampers-braces are also presented here.In the end,a case study is conducted to demonstrate its feasibility and effectiveness.It is concluded that this simplified design procedure can well conform with China’s current design codes,and therefore it can be applied to seismic design of building structures installed with metallic dampers,so as to acquiring anticipated control effects and damping targets.
Metallic damper has been widely applied in seismic design of engineering structures for its advantages of simple mechanism,constructing convenience,lower cost,better performance,and easy to be maintained.However,there are still some controversies in current design procedure of structures with added metallic dampers.Pursuant to this,a simplified design procedure for such damping structures is proposed in this paper,which supposes that the metallic damper can only provide added stiffness(i.e.neglecting its added damping and added mass) under frequently occurred earthquake and then account into its added damping with the impact of added stiffness under precautionary earthquake.The design principle is deemed as "added stiffness-based design under frequently occurred earthquake and added damping-based design under precautionary earthquake",and the specific design process is given with the thought of designing the main structure and energy-dissipating components separately,a series of calculating equations for parameter design of dampers-braces are also presented here.In the end,a case study is conducted to demonstrate its feasibility and effectiveness.It is concluded that this simplified design procedure can well conform with China’s current design codes,and therefore it can be applied to seismic design of building structures installed with metallic dampers,so as to acquiring anticipated control effects and damping targets.
引文
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[13]吕西林,周德源,李思明,等.建筑结构抗震设计理论与实例[M].2版.上海:同济大学出版社,2002.
[14]Lin Y Y,Tsai M H,Hwang J S,et al.Direct displacement-based design for building with passive energy dissipation systems[J].Engineering Structures,2003,25(1):25-37.
[15]Kasai K,Oohara K,Sekiguchi Y.JSSI Manual for building passive control technology:part-11 time-history analysis modelfor viscous dampers[C]//Proceeding of 13th World Conference on Earthquake Engineering.Vancouver:[s.n.],2004:1 427.
[16]广州大学.JGJXX-20建筑消能减震技术规程[S].征求意见版.北京:中国建筑工业出版社,2011.
[17]翁大根,吕西林.消能减震结构设计参数研究与试验验证[J].地震工程与工程振动,2004,24(2):150-157.
[18]朱旭东,吕西林,徐崇恩.软钢消能器基于Bouc-Wen模型的参数识别研究[J].结构工程师,2011(5):124-128.
[2]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006.
[3]中华人民共和国住房和城乡建设部.GB 50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[4]Lin Y Y,Tsai M H,Hwang J S,et al.Direct displacement-based design for building with passive energy dissipation systems[J].Engineering Structures,2003,25(1):25-37.
[5]邓明科,张思海,梁兴文.被动耗能减震结构基于能力谱法的抗震设计方法研究[J].土木工程学报,2006(7):26-32.
[6]李钢,李宏男.基于位移的消能减震结构抗震设计方法[J].工程力学,2007(9):88-94.
[7]Choi H,Kim J.Energy-based seismic design of buckling-restrained braced frames using hysteretic energy spectrum[J].En-gineering Structures,2006,28(2):304-311.
[8]Parulekar Y M,Reddy G R,Vaze K K,et al.Seismic response analysis of RCC structure with yielding dampers using lineariza-tion techniques[J].Nuclear Engineering and Design,2009,239(12):3 054-3 061.
[9]Amadeo Benavent Climent.An energy-based method for seismic retrofit of existing frames using hysteretic dampers[J].SoilDynamics and Earthquake Engineering,2011,31(10):1 385-1 396.
[10]Habibi A,Chan R W K,Albernami F.Energy-based design method for seismic retrofitting with passive energy dissipationsystems[J].Engineering Structures,2013,46:77-86.
[11]王华琪,丁洁民,何志军.防屈曲支撑的应用与设计[J].结构工程师,2007,23(4):6-11.
[12]高向宇,张腾龙,黄海涛,等.用防屈曲支撑改进钢框架-支撑结构抗震性能的设计方法[J].北京工业大学学报,2010,36(9):1 206-1 214.
[13]吕西林,周德源,李思明,等.建筑结构抗震设计理论与实例[M].2版.上海:同济大学出版社,2002.
[14]Lin Y Y,Tsai M H,Hwang J S,et al.Direct displacement-based design for building with passive energy dissipation systems[J].Engineering Structures,2003,25(1):25-37.
[15]Kasai K,Oohara K,Sekiguchi Y.JSSI Manual for building passive control technology:part-11 time-history analysis modelfor viscous dampers[C]//Proceeding of 13th World Conference on Earthquake Engineering.Vancouver:[s.n.],2004:1 427.
[16]广州大学.JGJXX-20建筑消能减震技术规程[S].征求意见版.北京:中国建筑工业出版社,2011.
[17]翁大根,吕西林.消能减震结构设计参数研究与试验验证[J].地震工程与工程振动,2004,24(2):150-157.
[18]朱旭东,吕西林,徐崇恩.软钢消能器基于Bouc-Wen模型的参数识别研究[J].结构工程师,2011(5):124-128.
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