R·C·巨型框架结构抗震能力设计措施的探讨
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摘要
以位于巨型梁上的次框架底层柱底截面组合弯矩设计值增强系数的不同取值为变量,进行多个典型巨型平面框架设计。采用平面结构弹塑性动力分析程序Drain-2d+,对每个典型巨型框架在地震作用下进行弹塑性时程分析,得出这些巨型框架在地震作用下的受力变形特点、塑性铰出现情况和整个结构的薄弱环节等,从中找出位于巨梁上的次框架底层柱底截面弯矩设计值增强系数取值的正确思路,并给出设计的合理取值,为钢筋混凝土巨型结构设计提出若干建议。
This paper provides several typical mega plane frame designs on condition that the variables are the combination of varying amplification factors of moment at bottom sections of ground floor columns of the minor frame on the major beams.The elastoplastic dynamic analysis program Drain-2d+ of the plane structure is used to get elastoplastic time-history analysis for each typical mega frame under the action of seism.After the analysis,the information of the mechanical transmutation characteristics,the emergency of the plastic hinge and the weak point of the whole structure under the action of seism is obtained,from which the correct thinking of how to obtain the design value of amplification factors of moments at bottom sections of ground floor columns of the minor frame on the major beams is found.The reasonable design values are recommended in this paper in order to provide some suggestions for the design of the reinforced concrete mega-frame structure.
This paper provides several typical mega plane frame designs on condition that the variables are the combination of varying amplification factors of moment at bottom sections of ground floor columns of the minor frame on the major beams.The elastoplastic dynamic analysis program Drain-2d+ of the plane structure is used to get elastoplastic time-history analysis for each typical mega frame under the action of seism.After the analysis,the information of the mechanical transmutation characteristics,the emergency of the plastic hinge and the weak point of the whole structure under the action of seism is obtained,from which the correct thinking of how to obtain the design value of amplification factors of moments at bottom sections of ground floor columns of the minor frame on the major beams is found.The reasonable design values are recommended in this paper in order to provide some suggestions for the design of the reinforced concrete mega-frame structure.
引文
1蓝宗建,杨东升,张敏.钢筋混凝土巨型框架结构弹性地震反应分析.东南大学学报,2002,32(5):724-727
2李正良.钢筋混凝土巨型结构组合体系的静动力分析:[博士学位论文].重庆:重庆大学,1999
3滕智明,朱金铨.混凝土结构及砌体结构.北京:中国建筑工业出版社,1994
4丁永君.DRAIN-2D计算程序在高层建筑结构弹塑性变形分析中的应用.建筑结构学报,1994(12):18-22
5杨溥,李英明,赖明.结构时程分析法输入地震波的选择控制指标.土木工程学报,2000,33(1):33-37
6杨红,王珍,韦锋,等.柱底抗弯能力增强措施对钢筋混凝土框架抗震性能的影响.世界地震工程,2002,18(4):66-72
2李正良.钢筋混凝土巨型结构组合体系的静动力分析:[博士学位论文].重庆:重庆大学,1999
3滕智明,朱金铨.混凝土结构及砌体结构.北京:中国建筑工业出版社,1994
4丁永君.DRAIN-2D计算程序在高层建筑结构弹塑性变形分析中的应用.建筑结构学报,1994(12):18-22
5杨溥,李英明,赖明.结构时程分析法输入地震波的选择控制指标.土木工程学报,2000,33(1):33-37
6杨红,王珍,韦锋,等.柱底抗弯能力增强措施对钢筋混凝土框架抗震性能的影响.世界地震工程,2002,18(4):66-72
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