Finite element analysis of axially loaded column plated column base

摘要

At present, according to Code for Design of Steel Structures(GB50017-2003), for axially loaded column with plated column base, the column bases are considered as hinged supports, but possess actually remarkable rotational restraint. The effective length of columns can be decreased when the constraint function of plated column base is considered in calculation. The calculation of effective length factor of columns is usually according to the approximate formula which is deduced by the rotational stiffness. Axially loaded column plated column base models were established with the finite element software, the effective length factor of columns was obtained by the method which can avoid calculating rotational stiffness of plated column bases, the influence factors on the rotational restraint of axially loaded column plated column base, such as the base plate thickness, the diameter of anchors, the column section size were also analyzed in this paper.