钢筋混凝土铰支柱与框架柱二阶效应研究

【作者】 曾铁梁；

【导师】 邹银生； 汪梦甫；

【作者基本信息】 湖南大学 ， 结构工程， 2002， 硕士

【摘要】 钢筋混凝土框架结构在工程建设中广泛应用，其偏压构件的强度问题和稳定问题一直受到人们的重视。柱二阶效应问题研究的是柱轴力和变形的相互关系及其产生的附加内力和附加变形。对于二阶效应分析应该从整体上考虑。 本文对铰支柱和框架柱的二阶效应问题进行了较全面的研究。讨论了钢筋混凝土柱二阶效应问题的研究现状和存在问题。从等偏心距铰支柱和不等偏心距铰支柱两方面分析铰支柱，框架柱则分成无侧移框架柱和有侧移框架柱两种形式进行分析。 本文采用五区段变刚度单元模型，考虑了各种因素的影响，用PowerFortran语言编制了钢筋混凝土框架柱非线性分析程序，与已有试验结果进行了对比，吻合良好；对偏心距增大系数公式分成无侧移框架柱和有侧移框架柱两种情况分别进行了修改；修正了当量弯矩折减系数C_m；讨论了影响框架柱二阶效应和承载能力的主要因素；修改了钢筋混凝土框架杆件刚度折减系数。更多还原

【Abstract】 Reinforced concrete frame is widly used in the engineering construction today. The intention and stabilization problem of eccentricity member get hold of the attention all the time. The second-order effects of column emphasize the connection between axis load and distortion add-ons internal force and add-ons distortion,second-order effects analysis should consider from whole.The paper studies the second-order effects and stability problem of the reinforced concrete hinged column and frame column. Discuss the study status and the problem existent of reinforced concrete column. Research the hinged column from same end moments and different end moments. Research the frame column from no sway frame column and sway frame column.The paper use model of variety of stiffness divided into five parts,and consider into all sorts of factors. Workout a program which writed by Power Fortran to study the nonlinear analysis of reinforced concrete frame. Calculate a example;analyze the questions of approximate magnifier in two conditions;modify the modulus Cm;discuss the factors which effectsecond-order effects and the carrying capacity;modify the modulus weaken stiffness of reinforced concrete frame.更多还原