南通大学学报:自然科学版
南通大學學報:自然科學版
남통대학학보:자연과학판
Journal of Nantong University (Natural Science Edition)
2011年
3期
53-59
,共7页
罕遇地震%基础隔震%静力非线性分析%结构损伤%动力非线性分析
罕遇地震%基礎隔震%靜力非線性分析%結構損傷%動力非線性分析
한우지진%기출격진%정력비선성분석%결구손상%동력비선성분석
severe earthquake%base isolation%nonlinear static procedure%structure damage%nonlinear dynamic procedure
以一榀具有集中塑性铰单元模型的基础隔震钢框架为模型,分别采用静力弹塑性分析方法(Push-over)和直接积分的动力弹塑性时程的方法,基于过程追踪,计算了隔震框架各损伤模式首次出现时的层间位移、隔震层位移及框架顶点位移,对比研究了基础隔震结构在地震作用下的损伤.结果表明:Push-over静力弹塑性分析方法可以作为基础隔震结构在地震作用下的结构损伤分析的简化方法;对应于性能点位移的结构动力弹塑性所分析的层间位移等均值结果与静力弹塑性分析结果具有一定的符合程度.
以一榀具有集中塑性鉸單元模型的基礎隔震鋼框架為模型,分彆採用靜力彈塑性分析方法(Push-over)和直接積分的動力彈塑性時程的方法,基于過程追蹤,計算瞭隔震框架各損傷模式首次齣現時的層間位移、隔震層位移及框架頂點位移,對比研究瞭基礎隔震結構在地震作用下的損傷.結果錶明:Push-over靜力彈塑性分析方法可以作為基礎隔震結構在地震作用下的結構損傷分析的簡化方法;對應于性能點位移的結構動力彈塑性所分析的層間位移等均值結果與靜力彈塑性分析結果具有一定的符閤程度.
이일품구유집중소성교단원모형적기출격진강광가위모형,분별채용정력탄소성분석방법(Push-over)화직접적분적동력탄소성시정적방법,기우과정추종,계산료격진광가각손상모식수차출현시적층간위이、격진층위이급광가정점위이,대비연구료기출격진결구재지진작용하적손상.결과표명:Push-over정력탄소성분석방법가이작위기출격진결구재지진작용하적결구손상분석적간화방법;대응우성능점위이적결구동력탄소성소분석적층간위이등균치결과여정력탄소성분석결과구유일정적부합정도.
Two methods, nonlinear static procedure (Push-over analysis) and nonlinear dynamic procedure, are used to analyze the ultimate plastic damage and the performance-point plastic damage of a 6-floor based-isolated-steel frame under severe earthquake action, based on process tracking. The story drift, the displacement of isolated floor, and the top-point displacement of structure are analyzed. The results reveal that push-over analysis can be considered as an effective and simple appraisal method about isolated structure under earthquake action. The mean analysis, which is gotten from nonlinear dynamic procedure, such as the story drift, matches those from Push-over analysis to some extent.