New composite slab system for the structural rehabilitation of traditional buil...

• Author(s): Mastali, M. ; Valente, Isabel ; Barros, Joaquim A. O.
• Date: 2013
• Persistent ID: http://hdl.handle.net/1822/26125
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Composite GFRP-HPRFC Sandwich panel; Rehabilitation; Slab
• Document Type: Conference Object
• Language: English

Description

The study presented in this paper is a part of the research project “RehabGFRP - Rehabilitation of Building Floors with Lightweight High Performance GFRP Sandwich Panels”, with reference number of PTDC/ECM/113041/2009. In this paper, a new generation of composite sandwich panel slab is proposed as a solution for the rehabilitation of slabs in old masonry buildings. The new slab composite system is composed of four elements that include: High Performance Fiber Reinforced Concrete (HPFRC) layer, GFRP ribs, foam core and GFRP skin. An innovative GFRP-HPFRC hybrid solution has been developed, with a GFRP laminate on the bottom tension skin, and an HPFRC layer on the top compression skin, preventing the occurrence of buckling phenomena, improving the resistance to the effects of impact and fire, providing a ductile behavior and allowing for an easy application of floor covering materials. GFRP ribs and foam core are able to transfer shear stresses between skins. The design process of the proposed hybrid GFRP-HPFRC sandwich panel slab is presented. The effects of various parameters on the behavior of the slabs are investigated by using both linear and material nonlinear analysis, with the aid of the software FEMIX. According to the obtained results, some criteria are established in order to choose the best slab solutions, which include design codes recommendations, failure criteria, serviceability criteria and economic aspects.