Banca de DEFESA: RENAN GUSTAVO PACHECO SOARES

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : RENAN GUSTAVO PACHECO SOARES
DATE: 24/02/2023
TIME: 09:00
LOCAL: Pós-Graduação Engenharia Civil
TITLE:

Structural Performance of Reinforced Concrete Buildings Filled by Sealing Masonry Panels

KEY WORDS:

tall buildings; reinforced concrete; masonry panel; structural performance.

PAGES: 155
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

As a sealing element, ceramic block masonry panels have been commonly adopted in multi-story buildings. In Brazil, although its use is being considered at the design stage only as a function of filling spaces, it has contributed to the redistribution of stresses and reduction of deformations, due to the increase in the rigidity of the system. Currently, some international standards specify parameters related to design considerations, but with caveats and restrictions, in addition to differences between them that lead to discrepant results. It appears that the scientific community has not yet reached a consensus with regard to the effective widths of the diagonals, discontinuities of the panels and characterization in the design stage of the behavior closer to the actual performance in service. Thus, the present study focused on defining the behavior of structural systems of reinforced concrete buildings, considering the influence of ceramic block masonry panels. This is done through numerical analysis, with the help of Eberick and ANSYS software. For this, a 27-story building was modeled, located in the city of Recife-PE. In the first stage, the method of equivalent diagonals was used to model 16 different structural systems considering the masonry panel of ceramic blocks as filling. The evaluated variables were the critical points related to tensions and deformations. In the second stage, the finite element method was used to evaluate the system locally. The results found in the first analysis showed divergence between the equivalent diagonals, with 25% of the mathematical models not fitting the problem. The insertion of masonry panels in the system contributed to a redistribution of efforts, reduction of lateral displacements, global stability, P-delta effect, global geometric imperfections, dynamic analysis, horizontal accelerations and natural frequency. In the numerical analysis by finite elements, the reduction of lateral deformations was also verified. Some efforts influenced the contact interfaces and panel edges, resulting in sliding and detachment effects. In panels with discontinuities, it was verified that the equivalent diagonal does not present the same behavior as a fully filled panel. The equivalent diagonal was characterized, with an average value of . This value has a good approximation with previous formulations, diverging on average by only 3.46%. It was found that the effect of peeling coatings on buildings is not just a question of the materials involved, but also of the structural behavior of the system.

COMMITTEE MEMBERS:
Externo à Instituição - JOAO MANOEL DE FREITAS MOTA - IFPE
Externo ao Programa - 1179576 - JOSE JEFERSON DO REGO SILVA - nullExterno à Instituição - JOSÉ AFONSO PEREIRA VITÓRIO - UPE
Interno - 2250444 - RENATO DE SIQUEIRA MOTTA
Presidente - 2994651 - TIAGO ANCELMO DE CARVALHO PIRES DE OLIVEIRA