INFLUÊNCIA DA VARIAÇÃO DA SEÇÃO DE CONCRETO NO DIMENSIONAMENTO DE PILARES DE SEÇÃO I MISTOS DE AÇO E CONCRETO VIA COMPUTACIONAL

Resumo

This paper presents the development of a program in C++ language that intends to design
composite concrete encased steel (CES) columns, which are composed of I-shaped steel that it will be
totally surrounded by concrete. The formulation of the program is based on expressions of Attachment
P of ABNT NBR 8800:2008, so it can be possible to obtain an axial compressive force and moments as
well as to verify the interaction between concrete and steel, steel contribution factor and slenderness. It
was analyzed the influence of the variation of the concrete section in the resistance in terms of moments
of the CES column considering that other parameters remained constant. It is concluded that with the
increase of the concrete section there is an increase of the resistance in terms of bending moments. It is
also possible to perceive that if there is an increase in the height of the concrete section there is a growth
in the percentage variation of the bending moment in relation to the x and y axes. While only increasing
the width of the concrete section there is an increase of the bending moment with relation to the y-axis
and a small increase with relation to the x-axis, it occurs because the moment of inertia of the profile

with relation to the x-axis is much larger than the moment of inertia of the profile with relation to the y-
axis.