重庆大剧院细长框架柱承载力非线性分析
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摘要
采用基于柔度法的纤维模型梁柱单元有限元分析程序,考虑材料非线性和几何非线性,以目标柱周边构件组成的局部框架整体作为分析对象进行非线性分析,研究偶然偏心、基础嵌固条件等因素对重庆大剧院钢筋混凝土细长框架柱承载力的影响。结果表明,偶然偏心是影响极限承载力的重要因素,另外,基础嵌固也在一定程度上影响极限承载力,适当加强配筋可以提高柱子的极限承载力,弥补柱底在基础内非完全固定嵌固对极限承载力的削弱。
To investigate the influence of accidental eccentricity,embedded-in foundation condition and other factors on the ultimate strength of the RC slender frame column for Chongqing Grand Theatre,a nonlinear analysis of the local frame composed of peripheral components of target columns was conducted.The finite element analysis program based on the flexibility-method and fiber-model beam-column element was used to consider material and geometric nonlinearities.The results show that accidental eccentricity is an important factor on the ultimate strength.In addition,embedded-in foundation condition can influence ultimate strength to a certain extent and an appropriate strengthened reinforcement can enhance the ultimate strength of the column,to offset the ultimate strength,which is weakened by the non-completely embedment of the column end in the foundation.
To investigate the influence of accidental eccentricity,embedded-in foundation condition and other factors on the ultimate strength of the RC slender frame column for Chongqing Grand Theatre,a nonlinear analysis of the local frame composed of peripheral components of target columns was conducted.The finite element analysis program based on the flexibility-method and fiber-model beam-column element was used to consider material and geometric nonlinearities.The results show that accidental eccentricity is an important factor on the ultimate strength.In addition,embedded-in foundation condition can influence ultimate strength to a certain extent and an appropriate strengthened reinforcement can enhance the ultimate strength of the column,to offset the ultimate strength,which is weakened by the non-completely embedment of the column end in the foundation.
引文
[1]GB50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.
[2]gmp国际建筑设计有限公司,华东建筑设计研究院有限公司.结构初步设计[R].2005.
[3]黄宗明,陈滔.基于有限单元柔度法和刚度法的非线性梁柱单元比较研究[J].工程力学,2003,20(5):24-31.HUANG Zong-ming,CHEN Tao.Comparison betweenflexibility-based and stiffness-based nonlinear beam-column elements[J].Chinese Journal of EngineeringMechanics,2003,20(5):24-31.
[4]陈滔.基于有限单元柔度法的钢筋混凝土框架结构三维非弹性地震反应分析[D].重庆:重庆大学,2003.
[5]张健.重庆大剧院细长框架柱承载力及其影响因素分析[D].重庆:重庆大学,2007.
[2]gmp国际建筑设计有限公司,华东建筑设计研究院有限公司.结构初步设计[R].2005.
[3]黄宗明,陈滔.基于有限单元柔度法和刚度法的非线性梁柱单元比较研究[J].工程力学,2003,20(5):24-31.HUANG Zong-ming,CHEN Tao.Comparison betweenflexibility-based and stiffness-based nonlinear beam-column elements[J].Chinese Journal of EngineeringMechanics,2003,20(5):24-31.
[4]陈滔.基于有限单元柔度法的钢筋混凝土框架结构三维非弹性地震反应分析[D].重庆:重庆大学,2003.
[5]张健.重庆大剧院细长框架柱承载力及其影响因素分析[D].重庆:重庆大学,2007.
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