考虑平板柱脚转动的带悬伸段柱计算长度系数  

Effective length factor of overhanging column in considering column base rotation

作　　者：孟凡涛[1,2] 赵建锋[1] 阮兴群 柳晓博 

机构地区：[1]青岛理工大学,山东青岛266033 [2]聊城市规划建筑设计院,山东聊城252000

出　　处：《土木工程学报》2010年第S2期235-240,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(50808105);山东省自然科学基金(BS2009SF003);城市与工程安全减灾省部共建教育部重点实验室开放基金(EESR2008-07)

摘　　要：参照相关文献及规范,利用给出的露出式柱脚转动刚度公式,建立同时考虑柱脚转动和柱子剪切变形的带悬伸段柱稳定方程。通过柱脚转动刚度的变化和上下段刚度比的改变,求解建立的稳定方程,从中得出柱脚转动刚度和上下段刚度比对带悬伸段柱计算长度的影响;并得出当下段柱的线刚度是柱脚转动刚度的100倍时的计算长度系数相当于柱脚铰接时的计算长度系数。该结果对深入研究柱脚转动刚度对上部结构的影响以及剪切变形对柱子计算长度系数的影响有一定的参考价值。Reference to relevant paper and code,by using the rotational stiffness of column base with exposed base plate,stability equation for overhanging columns is established in considering base rotation and shear deformation.Solving the established stability equation by changing rotational stiffness,upper and lower stiffness ratio,the impact of rotational stiffness and upper and lower stiffness ratio is given.A rule is found that the length factor when the column base is hinged equivalent to the length factor when the column's line stiffness of the under part is 100 times of the rotational stiffness of the column base.The results is important for studying impact of the rotational stiffness of column base for the upper structures and shear deformation for column effective length factor.

关 键 词：柱脚转动刚度 剪切变形 带悬伸段柱 计算长度系数 铰接 刚接 

分 类 号：TU391[建筑科学—结构工程]