Avaliação númérica de ensaios push-out com conectores de cisalhamento tipo pino e perfobond.

• Autor(a) principal: Cruz, Bruno Costa da
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/11530
• topic: Steel-concrete composite structures; Shear connector; Stud; Perfobond; Push-out; Nonlinear analysis; Finite element analysis; Estruturas mistas aço-concreto; Conector de cisalhamento; Análise não-linear; Método dos elementos finitos; CNPQ::ENGENHARIAS::ENGENHARIA CIVIL

A continuous increase of the use of (steel & concrete) composite structures in constructions can be recently observed. This is mainly due to its faster execution time when compared to other construction alternatives. Additionally, these solutions optimize the structural characteristics of the involved materials: the steel tension capacity and the concrete compressive strength. The transfer of forces between these different materials greatly influences the composite structure performance, where typical solutions uses shear connectors at the concrete to steel interface. The Eurocode 4 defines an experimental test, denominated push-out, to determine the shear connectors strength and associated ductility capacity. Its performance is influenced by the concrete compressive strength, slab dimensions and adopted reinforcing bar area, steel profile dimensions, shear connectors geometry and disposition and by the mechanical characteristics of the connector, profile and reinforcing bars steels. All these aspects indicate that a great number of variables can influence the test. This study presents the development of a finite element model, based on the ANSYS program, to simulate push-out tests. The numerical results presented in this investigation were calibrated against experiments reported in the literature for stud and Perfobond shear connectors. The Perfobond connectors present a substantial shear capacity being influenced by several factors like: connector s hole number and diameter and by the adoption, or not, of extra reinforcing bars passing through the connector holes.