Affiliation:
1. Department of Structural Engineering and Building Materials, Faculty of Engineering and Architecture, Ghent University, 9000 Ghent, Belgium
2. Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent University, 9000 Ghent, Belgium
Abstract
This study investigates the mechanical properties of tiled laminates, frequently used in FRP bridges, and a completely new class of composites for which currently no experimental literature is available. In this paper, first a microscopic examination of laminates extracted from bridge deck flanges is performed, revealing complex multi-ply structures and tiled laminates in the transverse direction of the bridge deck. The subsequent fabrication of tiled laminates in the transverse (i.e., weak) and longitudinal (i.e., strong) span direction explores stiffness and strength characteristics depending on the stacking angle. It is observed that the stiffness in both directions is only slightly reduced with increasing stacking angles, reaching a maximum decrease of 10%, while the failure strength is significantly reduced, particularly with longitudinal tiling, dropping by approximately 70% for a 2° stacking angle. Transverse tiling demonstrates a more moderate 45% strength reduction due to the presence of some 90° plies. Given the small reduction in the stiffness and the fact that in many applications the design is mainly governed by serviceability (i.e., stiffness) requirements than strength, this strength reduction may be acceptable, considering other advantages of the concept. Additionally, this research sheds light on failure mechanisms, emphasizing the role of ply assembly in stress distribution and highlighting the importance of gradual ply ends in reducing strain concentrations. These findings provide valuable insights for optimizing tiled laminates in structural applications, ensuring their effective and reliable use.
Funder
Strategic Basic Research Fellowship
Reference25 articles.
1. Developments in FRP bridge design;Kendall;Reinf. Plast.,2010
2. Use of Fibre Reinforced Polymers in Bridge Construction;Curran;Bridge Eng.,2005
3. Friberg, E., and Olsson, J. (2014). Application of Fibre Reinforced Polymer Materials in Road Bridges—General Requirements and Design Considerations. [Master’s Thesis, Chalmers University of Technology].
4. Applications of Fiber Reinforced Polymer Composites (FRP) in Civil Engineering;Nizam;Int. J. Adv. Struct. Geotech. Eng.,2014
5. A review of the present and future utilisation of FRP composites in the civil infrastructure with reference to their important in-service properties;Hollaway;Constr. Build. Mater.,2010