带楼梯框架结构静力推覆分析及弹塑性性能研究
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摘要
通过对带楼梯钢筋混凝土框架结构的静力推覆分析,并与不计入楼梯的框架模型进行分析对比,研究了楼梯对框架结构弹塑性性能的影响以及带楼梯框架结构的屈服机制。研究表明:不计入楼梯计算的常规设计方法不能达到预期的抗震设防目标,为此提出一种楼梯与主体脱离的设计措施。
Through pushover analysis for frame structure with staircase involved or not,the affection of staircase on elastic-plastic performance of frame structure,and the yielding mechanism of frame structure with staircase were studied.Analysis results indicate that the conventional analysis and design without staircase can not meet the expected seismic target.So the suggestion that the stair case is isolated from main structure was put forward for engineering design.
Through pushover analysis for frame structure with staircase involved or not,the affection of staircase on elastic-plastic performance of frame structure,and the yielding mechanism of frame structure with staircase were studied.Analysis results indicate that the conventional analysis and design without staircase can not meet the expected seismic target.So the suggestion that the stair case is isolated from main structure was put forward for engineering design.
引文
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[9]周劲炜,周庆伟,何鹏辉,等.甘孜藏族自治州民族博物馆结构设计[J].建筑结构,2010,40(9):133-136.
[2]SPACONE E,FILIPPOU F C,TAUCER F F.Fiber beam-column model for nonlinear analysis of RC frames.I:Fomulation[J].Earthquake Engineering and StructureDynamic,1996,25(7):711-725.
[3]HJELMSTAD K D,TACIROGLU E.Variational basis ofnonlinear flexibility methods for structural analysis offrames[J].Journal of Engineering Mechanics,2005,131(11):1157-1169.
[4]刘南科,周基岳,肖允徽,等.钢筋混凝土框架的非线性全过程分析[J].土木工程学报,1990,23(4):2-14.
[5]冯远,刘宜丰,肖克艰,等.来自汶川大地震亲历者的第一手资料——结构工程师的视界与思考[M].北京:中国建筑工业出版社,2009.
[6]MIAO Z W,LU X Z,JIANG J J,et al.Nonlinear FEmodel for RC shear walls based on multi-layer shellelement and microplane constitutive model[C]//The 10thInternational Conference on Enhancement and Promotion ofComputational Methods in Engineering and Science.Sanya:2006:21-23.
[7]叶列平,陆新征,马千里,等.混凝土结构抗震非线性分析模型、方法及算例[J].工程力学,2006,23(S2):131-140.
[8]刘建新.高层框-剪结构中框架地震内力的确定[J].建筑结构学报,1999,20(3):14-22.
[9]周劲炜,周庆伟,何鹏辉,等.甘孜藏族自治州民族博物馆结构设计[J].建筑结构,2010,40(9):133-136.
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