摘要
文中报导了21根在轴向力和侧向力共同作用下的钢管砼悬臂单元柱的试验结果。试验的参数为高径比H/D和轴压比N_o/N_o。试验结果表明,影响钢管砼悬臂单元柱极限承载能力的主要因素,与钢管砼无侧移框架柱一样,仍然为偏心率和长细比,并服从“双系数乘积”规律。文中引用“等效计算长度”的概念,将悬臂单元柱的承载能力计算等效为钢管砼标准单元柱的计算。对各种情况下的等效计算长度系数的取值作了探讨。同时还将有侧移框架柱视为由反弯点所分割成的两个子悬臂单元柱的组合,进而探讨了钢管砼有侧移框架柱的承载能力计算问题。
The test results of 21 restrained cantilever columns of concrete- filled steel tubes under combined axial and lateral loads are presented.The main experimental parameters are the slenderness ratio H/D and the axial load level Nu/N0.Test results show that, as in the case of pin-ended columns, the eccentricity and slenderness are the main factors affecting the load-carrying capacity of cantilever columns. Using the conception of 'equivalent column length' , the strength of a cantilever column can be converted to that of an equivalent pin-ended standard column with equal moments at both ends in case of same eccentricity in the pin-ended connections. This analysis approach has been extended to predict the load-carrying capacity of concrete-filled steel tubular columns in frame with sidesway, in which the frame column is treated as a combination of two cantilever sub-columns separated at its point of inflection. Formulas for predicting the 'equivalent length' are proposed in the paper.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
1992年第4期2-11,共10页
Journal of Building Structures
