Study on elastic stability of bars considering actual stiffness of conections by forced displament method

Abstract

Usually when calculating bar stability, it is assumed that the connections at the ends of the bars, the intersections between the bars are absolutely rigid or ideal pinned. In fact, the stiffness of the connections varies between the two states mentioned above. The actual stiffness of the connections has a great influence on the strength, stiffness and stability of the bars. Therefore, in this paper, the author proposes how to apply the forced displacement method to determine the Euler critical forces for straight bars subjected to longitudinal bending, considering to the actual stiffness of the connections.

Keywords: Euler critical force; actual stiffness of the connections; bar stability ...