Buckling and post-buckling of rotationally restrained columns with imperfections  

作　　者：CAI JianGuo XU YiXiang FENG Jian ZHANG Jin 

机构地区：[1]Key Lab of C&PC Structures of Education of Ministry Southeast University, Nanjing 210096, China [2]National Engineering Research Center for Prestress, Southeast University, Nanjing 210096, China [3]Department of Civil Engineering, Strathclyde University, Glasgow, UK

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第8期1519-1522,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50478075);Jiangsu "Six Top Talent" Program of China(Grant No. 07-F-008);Scientific Research Foundation of Graduate School of Southeast University (Grant No. YBJJ0817)

摘　　要：The stability of imperfect columns has been studied by many researchers. Often the ends of a column are not necessarily fixed or pin-ended for practical structures. Therefore, rotationally restrained columns having an initial imperfection in an asymmetric mode have been studied in this paper. An elastic formula using the large deflection theory was given, and the shooting method was used to obtain the equilibrium paths and critical loads. Then the relationship between the end rotation and rotational restraints has been studied and discussed followed by a detailed discussion on the influence of imperfection on the column behaviour.The stability of imperfect columns has been studied by many researchers. Often the ends of a column are not necessarily fixed or pin-ended for practical structures. Therefore, rotationally restrained columns having an initial imperfection in an asymmetric mode have been studied in this paper. An elastic formula using the large deflection theory was given, and the shooting method was used to obtain the equilibrium paths and critical loads. Then the relationship between the end rotation and rotational restraints has been studied and discussed followed by a detailed discussion on the influence of imperfection on the column behaviour.

关 键 词：COLUMNS BUCKLING IMPERFECTIONS structural stability supports 

分 类 号：O343.9[理学—固体力学] TU33[理学—力学]