Computer modeling as evaluation method of column base bearing capacity in tower buildings

摘要

This paper is devoted to computer modeling of composite structure the column base under question is contact interaction of bodies, which, when taken into account, allows to simulate the interaction of their constituent elements undergoing deformation. In modern tower buildings with braced framing, column structural design for compression is usually done taking into account random eccentricities. To attain a relatively uniform load transmission from a column to a foundation, the column base has to be made of high-strength metal. The required height of the column base can be composed of single individual plates, without reducing the design strength of metal. The strain state in contact zones and distribution patterns of contact pressure are extremely diverse. It depends on a number of factors affecting cohesion. That is why we considered the system of approximating models, which allows to find out to what extent their complication is necessary with the view to modern computers' potential. We used design diagram with "soft" loading, which evaluates the upper bound of structure bearing capacity and the diagram with "stiff loading, which evaluates the lower bound.