摘要：一、问题的提出当转速较高,不宜采用推力球轴承(因其极限转速较低),且轴向载荷不大时,单列向心球轴承可以代替推心球轴承承受纯轴向载荷。而且,只要轴向载荷较小,转速较低时,这种替代亦可成立。这种替代不仅具有一定的经济效益,而且还可以使结构简化,因而在设计实践中时有应用。

摘要：This paper presents the design assessment of concrete encased I-sections composite column based approaches given in Eurocode, ACI Code, BS Code and AISC-LRFD. This study includes comparison of various design parameters and evaluation of design strength based on the procedures predicted in the various codes of practices. A practical example has been assumed and calculation has been shown to evaluate their potentiality in understanding in predicting the potentiality of various procedures. The obtained results based on the methods varies widely, because of the different design considerations adopted by the different codes. As such, they have hardly considered the effect of confinement of the concrete due to the presence of longitudinal reinforcements as well as lateral ties. The study has attempted to throw light on critical review and their potentiality in assessing the strength of such concrete encased composite column under purely axial loads.