Numerical safety and performance analysis of a multipurpose building’s structure: case study
Análise numérica de segurança e desempenho da estrutura de edifício multiuso: estudo de caso
Palavras-chave:
Pathology of buildings, Elastic Instability, Structural AnalysisResumo
This report presents a case study of a multi-use building situated in Brasília-DF. The building's structural model is made up of elements of a spatial portico and four-knot plate, measuring 25.75 by 25.75 m with a height of 11.65 m. The structure is supported by rotating pillars at the base. The ground floor has a ceiling height of 3.25 m, while the other floors have a ceiling height of 2.80 m. The closure is made of bored brick masonry. In this article, numerical analyses were conducted using the SAP2000 structural software to verify the structure's displacement, deformation, and stress. The study followed the ultimate and in-use limit state criteria for the Brazilian standard of reinforced concrete (NBR 6118). The report also presents the building's structural pathologies, detected through visual inspection. The main structural elements and their respective pathologies are described, and numerical tests are shown. Due to the presence of various cracks and other pathologies in the building, an elastic instability analysis was conducted using the Rankine-Marchant analysis model to verify the collapse load factor. After approximately 17 years of use, the building is revisited to assess the durability and performance of the recovered structural components and procedures.
Downloads
Referências
ABNT, BRAZILIAN ASSOCIATION OF TECHNICAL STANDARDS - ABNT. NBR 6118/2003 - Standard for the design of concrete structures. Rio de Janeiro, 2003.
________. NBR 6118/1978 - Standard for the design of concrete structures. Rio de Janeiro, 1978.
________. NBR-6120/1984 – Loads for Calculation of Building Structures. Rio de Janeiro, 1984.
INOJOSA, L. S. P. O Sistema Estrutural na Obra de Oscar Niemeyer. Dissertação de Mestrado submetida à Faculdade de Arquitetura e Urbanismo da Universidade de Brasília, 2010.
INOJOSA, L. D. S. P. O Protagonismo da estrutura na concepção da arquitetura moderna brasileira. Tese de Doutorado. Faculdade de Arquitetura e Urbanismo. Universidade de Brasília. Brasília, p. 254. 2019.
INOJOSA, Leonardo da S. P.; PANTOJA, João da C.a; BUZAR, Márcio A. R.; OLIVEIRA, Iberê P.; Análise De Manifestações Patológicas E De Estruturas De Concreto Armado Para Preservação Do Patrimônio – Museu Da Cidade – Brasília-Df. In: Evoluções das ciências extas no mundo contemporâneo; Brazilian Journals Editora, 2022a. DOI: 10.35587/brj.ed.000155
INOJOSA, L. S. P.; BUZAR, M. A. R. O concreto e a arquitetura de Niemeyer em Brasília. CONCRETO & CONTRUÇÃO, v. L, p. 35-41, 2022b.
JUNIOR, F. A. C. Além de L sobre 10: Diretrizes para o lançamento estrutural arquitetônico. 2014. Dissertação (Mestrado em Arquitetura e Urbanismo) - Universidade de Brasília. Orientador: Márcio Augusto Roma Buzar.
SANTOS, Jorge Matheus Ribeiro. Design of Steel Structures in Plastic Regime – A Guide by NBR-8800, BS-5950 and Eurocode-3. Monograph of Final Project II. Faculty of Technology. Department of Civil and Environmental Engineering. 206p. Brasilia, 2019.
THOMAZ, Ercio (2006). Cracks in buildings: causes, prevention, and recovery. PINI Publishing. Polytechnic School and Institute of Technological Research of the University of São Paulo.