Análise de seções de concreto armado submetidas à flexo-compressão reta e oblíqua

Abstract

The reinforced concrete pillar is a structural element in which it represents the last instance of load reception before directing them. The foundations, therefore its correct dimensioning implies to have a structure with good conformity. This work aims to understand the effort variants and the verification of the resistant reinforcement of the medium-slender reinforced concrete pillar, from this straight composite flexion to oblique composite flexion analyzed by an algorithm produced by the collaborating parts of the present work. First is the description of the materials involved in the structure, presenting strength characteristics and arrangement within the section, the effects that interfere in it, such as local effects, localized and second order effects, demonstrating how they are interfering in the structure. Calculation of the design of the amount of bending stress resistant steel, which is a characteristic of its arrangement in the structure as well as its dimensions, is presented the approximate methods according to NBR 6118: 2014: Approximate K-stiffness standard abutment method and method of the standard abutment with approximate curvature. The first and second order eccentricities are presented, as well as the eccentricities depending on the studied position of the pillar. Finally the flexural compression sizing methodology is exemplified, having the theoretical basis in ARAÚJO (2010). With all the theoretical data demonstrated throughout the body of work the rugged section verification program is designed. Thus, it is arrived at a methodology of verification of the resistant moments in relation to the applicants in profiles of reinforced concrete pillars with rectangular section and bars allocated in each corner, with a later parametric analysis of the problem.