Navegando por Assunto "Shear connectors"
Agora exibindo 1 - 1 de 1
- Resultados por página
- Opções de Ordenação
Item Acesso aberto (Open Access) Avaliação dos métodos normativos para previsão da resistência à punção de lajes sem armadura de cisalhamento e com conectores de aço(Universidade Federal do Pará, 2016-06-06) PEREIRA FILHO, Manoel José Mangabeira; FERREIRA, Maurício de Pina; http://lattes.cnpq.br/4242041552985485This work presents an evaluation of the code provisions of various standards for the punching shear failure load on slab-column connections without shear reinforcement and reinforced with steel connectors. The code provisions evaluated are the ACI 3118 (2014), Eurocode 2 (2004), AC Eurocode 2 (2010), UK NA (2004), DIN NA (2011), EHE (2008), NBR 6118 (2014), ETA 12 / 5404 (2012), an adaptation of the ETA proposed by MUTTONI and BUJNAK (2012) and the fib Model Code 2010 (2011). These code recommendations are evaluated for accuracy, safety and economy through 340 test results in flat slabs without shear reinforcement and 140 results flat slabs reinforced with various types of steel connectors arranged in two databases, and all slabs had centered load. In both databases the performance of recommendations was evaluated from a statistical analysis, dispersion analysis of the results and penalized according to the "Demeter Points Classification" (DPC). In addition to the database with slabs without shear reinforcement analysis, in order to assess the reason for the dispersion of code provisions observed the influence of various parameters (fc, ρ, d, u0/d) in code provisions of punching shear resistance load. For the database with results of slabs reinforced with connectors, beyond the initial analysis, the database was divided into groups according to the failure modes of slab. In all groups was carried out the evaluation of equations for each mode of breakage by means of a statistical analysis, dispersion penalty and analysis of results using the "Demeter Points Classification" (DPC). In all groups were assessed the influence of various parameters in the provisions.