粘滞阻尼器减震结构设计方法及计算实例
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摘要
本文提出了一种实用的减震结构优化设计方法,该方法通过预先设定消能结构的位移角减震目标,进而由所需的附加阻尼比确定阻尼器的参数及数量,并以层间位移角为优化目标,采用"逐层搜索"的方法确定其安装位置,最终可以达到预先设定的层间位移角减震目标。随后,运用该方法对一幢实际方钢管混凝土框架高层进行了减震设计,提出了两种不同减震目标的减震方案,并结合阻尼器均匀布置方案对此结构进行了弹性及弹塑性计算,通过分析计算结果,对各种减震方案的减震效果进行了对比,并研究分析了小震和大震下减震结构的地震反应特点。
In this paper,an optimum design method of seismic energy-dissipated structure with viscous dampers is developed.In this method,the total number of dampers andits parameters can be determined by supplemental damping ratio which is depend on the optimization goal of inter-storey drift and the installation locations of dampers are determined by a search method.Then,two seismic energy-dissipation projects with different inter-story drift reduction ratio of a tall building of CFST frame structure are designed by the method.By the analysis of the structure under the two optimum projects and the other projects with dampers uniform installation,the seismic response of the structure with different energy-dissipation projects at frequent and seldom seismic intensity are investigated.
In this paper,an optimum design method of seismic energy-dissipated structure with viscous dampers is developed.In this method,the total number of dampers andits parameters can be determined by supplemental damping ratio which is depend on the optimization goal of inter-storey drift and the installation locations of dampers are determined by a search method.Then,two seismic energy-dissipation projects with different inter-story drift reduction ratio of a tall building of CFST frame structure are designed by the method.By the analysis of the structure under the two optimum projects and the other projects with dampers uniform installation,the seismic response of the structure with different energy-dissipation projects at frequent and seldom seismic intensity are investigated.
引文
[1]GB 50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社, 2001
[2]孟春光.复杂体型方钢管混凝土框架结构抗震性能和减震研究[D].同济大学,2006.
[3]吕西林,孟春光,田野.消能减震高层方钢管混凝土框架结构振动台试验研究和弹塑性时程分析[J].地震工程与工程振动,2006,26(4): 231-238.
[4]SOONG T T,DARGUSH G F.结构工程中的被动消能系统[M]//董平译.北京:辞学出版社,2005.
[5]李康宁,TETSUO KUBO,CARLOS E.VENTURA.建筑物三维分析模型及其用于结构地震反应分析的可靠性[J].建筑结构,2000, 30(6):14-18.
[2]孟春光.复杂体型方钢管混凝土框架结构抗震性能和减震研究[D].同济大学,2006.
[3]吕西林,孟春光,田野.消能减震高层方钢管混凝土框架结构振动台试验研究和弹塑性时程分析[J].地震工程与工程振动,2006,26(4): 231-238.
[4]SOONG T T,DARGUSH G F.结构工程中的被动消能系统[M]//董平译.北京:辞学出版社,2005.
[5]李康宁,TETSUO KUBO,CARLOS E.VENTURA.建筑物三维分析模型及其用于结构地震反应分析的可靠性[J].建筑结构,2000, 30(6):14-18.
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