The Study of Rigidity of a Steel Column Base Assembly Consisting of a Support Plate
Numerical studies of the stress-strain operation of a steel column are conducted. The purpose of research is to specify the work of the column base of a simplified type under the eccentric compression, to determine numerical characteristics of the elastic reaction of the column base to force action. The goal was achieved by solving a number of problems with the variation of thickness of the base plate of the computational model which was created and calculated by means of SolidWorks/CosmosWorks. Deformations graphics of specific part of the column base have been constructed. The controlled specific parts of the column base were the edges of the base plate; the edges of the column shaft adjacent to the base plate; the upper end surface of the column shaft. It is established that the deformation of elements constituting the column base has a similar dependence on the thickness of the base plate for various controlled parts. It is defined that the deformation diagram of the support plate of the column base of a simplified type has three characteristic parts: the zone of elastic (hard) work, flexible working area (geometrically nonlinear operation), the area of geometrically and physically non-linear operation. It is noted that the nature of deformation of the column base studied can be divided into three types: «hard stamp», «flexible plate» and «ultra-thin plate». For the thickness of the base plate starting from 70 mm, the practically linear deformation of the base is typical, for the thickness from 20 mm to 70 mm - non-linear elastic deformation. When the thickness of the base plate is up to 20 mm, the non-linear deformation with manifestation of plasticity is observed.