Safety assessment of punching shear failure according to the level of approximation approach

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

Beatrice Belletti (Autor) Outra; Mário Pimentel (Autor) FEUP; Matteo Scolari (Autor) Outra; Joost Walraven (Autor) Outra

Revista

Título: Structural Concrete

Vol. 16

Páginas: 366-380

ISSN: 1464-4177

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 19 Citações

ISI Web of Science

Scopus - 26 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia civil > Engenharia estrutural

Outras Informações

ID Authenticus: P-00G-NEZ

DOI: 10.1002/suco.201500015

Abstract (EN): The fib Model Code for Concrete Structures 2010 introduced the concept of levels of approximation (LoA) as a strategy for simplifying the procedures involved in preliminary design stages or the design of non-critical structural elements while still providing the tools for engineers to use state-of-the-art techniques in the assessment of existing structures or in the advanced stages of design for critical structural elements. In this paper, this concept is applied to the determination of the punching shear resistance of reinforced concrete slabs. A procedure is validated for the highest LoA involving non-linear finite element analysis (NLFEA) with multi-layered shell elements and the critical shear crack theory (CSCT). The safety format proposed for use in the safety verification assisted by NLFEA is based on the definition of a global resistance safety factor. A semi-probabilistic approach is followed, based on the assumption of a lognormal distribution for the resistance and on an estimate of its coefficient of variation. This approach is validated by means of a comparison with the results from a probabilistic analysis. The LoA approach is initially applied to the study of statically determinate slabs supported on one column to verify the effectiveness of the procedure presented here compared with other validated methods available in the literature. The paper concludes with a case study illustrating the application of the proposed procedure to a bridge deck slab and highlighting the benefits of using a higher LoA.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 15