Vigas-parede: uma abordagem sobre métodos de análise e critérios de definição

Abstract

This work deals with the study of wall beams, as well as their definitions and analysis methods recommended for sizing according to technical standards, such as the Finite Element Method and the Strut-and-Tie Method, and is based on national and international standards, and bibliographic references. The study is justified by the finding that the topic is not very widespread, and the standards and authors differ in their parameters. Therefore, the objective was to verify the parameters presented by the standards for defining wall beams based on a numerical simulation carried out using SAP 2000 software, a finite element program. Additionally, a comparative study of the design of the longitudinal reinforcement of wall beams using the Strut-and-Tie Method and using the Eberick software. In view of the results obtained for the numerical analysis, it was found that the Brazilian standard NBR 6118 (2014) is the one that best classifies beams geometrically as wall beams through the L/h ratio, while the American standard ACI 318 (2019) showed- very conservative regarding this classification. The numerical analysis also allowed us to observe that the support regions are regions of discontinuity that must be treated with special attention. The comparison of the results of sizing wall beams made using the Strut-and-Tie Method, and made using the Eberick program, which sizes with the prescriptions of NBR 6118 (2014) for usual beams, showed that the sizing generated by Eberick presents a steel rate for longitudinal reinforcement relatively lower than the rate obtained by the Strut-and-Tie Method, and its detailing does not follow the prescriptions of the Brazilian standard for wall beams.