【作者】 陈叶；

【导师】 刘忠；

【作者基本信息】 湘潭大学 ， 结构工程， 2016， 硕士

【摘要】 钢筋混凝土L形柱是指截面几何形状为L形,且肢长与肢厚比小于4的柱子。以其改善建筑及其使用功能、减轻结构自重和增加建筑面积的独特优点,自20世纪70年代以来得到了广泛的运用。异形柱结构发展前景广阔,具有重要的研究意义。本文在钢筋混凝土L形轴心受压柱的试验研究基础上,采用有限元分析技术,建立了钢筋混凝土L形受压柱的三维有限元分析模型,计算结果与试验结果吻合较好,证明了本文所建立的分析模型的合理性。首先,针对钢筋混凝土L形轴心受压柱的力学性能,进行了三维有限元非线性数值模拟分析。并讨论了混凝土强度、长细比、配筋率、体积配箍率等参数的变化对其力学性能的影响。其次,针对钢筋混凝土L形偏心受压柱的力学性能,进行了三维有限元非线性数值模拟分析,初步给定了大、小偏心受压情况的判定条件;研究了荷载加载角度、偏心距、长细比、配筋率、体积配箍率等因素对大、小偏心受压情况下界限偏心距的影响。并分别讨论了大、小偏心受压情况下,上述各参数对钢筋混凝土L形偏心受压柱力学性能的影响。更多还原

【Abstract】 L-shaped reinforced concrete column means a column whose section geometric shape is L and ratio of limb-length to thickness is lower than 4.It has been utilized extensively since 70 s of 20 c with its advantages of improving constructions’ function,lightening structural gravity,increasing area of structure.It has broad prospects and research significance.This essay builds analytic module of L-shaped reinforced concrete column,compares with experimental conclusion and matches well,and have verified the rationality of the module built,which is based on previous experimental research of reinforced concrete compression column.At first,this essay builds analytic module of L-shaped reinforced concrete column,aiming at the mechanical property of reinforced concrete compression column,and discusses the influence of parameter to mechanical property through changing the concret e strength,the slenderness ratio,the reinforcement ratio and stirrup ratio.Then,this essay builds analytic module of L-shaped reinforced concrete column,aiming at the mechanical property of reinforced concrete compression column,and determines the decision condition of small eccentricity or big eccentricity;This essay also discusses the influences from the load loading angle,eccentric distance,the slenderness ratio,the reinforcement ratio and the volume-stirrup ratio to the lower bound eccentricity under the condition of small eccentricity,big eccentricity and L-shaped reinforced concrete column,aiming at the mechanical property.更多还原