Fiber-Reinforced Polymer Composite Structures in Civil Engineering
Summary
Fiber-reinforced polymer (FRP) composites have emerged as transformative materials in civil engineering, combining high tensile strength, low weight and corrosion resistance. In their simplest form, FRP elements consist of continuous or discontinuous fibres embedded within a polymeric resin matrix, delivering tailored stiffness and strength. The pultrusion process enables the manufacture of constant-section profiles with aligned fibres, commonly used in bridge decks, pedestrian footbridges and structural reinforcement. Beyond new-build applications, FRP composites serve as externally bonded reinforcement for concrete and steel members, extending service life and improving seismic resilience. Key challenges include interlaminar stress concentrations, long-term durability under environmental exposure and the design of reliable connections. Recent advances in computational modelling, nondestructive evaluation and standardisation of design codes are driving wider adoption, with pilot structures completed across Europe, North America and Asia. The global significance of FRP structures lies in their potential to reduce carbon footprint, minimise maintenance and enable novel architectural forms.
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Fiber-Reinforced Polymer Composite Structures in Civil Engineering publication trend
The graph below shows the total number of articles in fiber-reinforced polymer composite structures in civil engineering across all publications each year (not limited to Nature Index journals).
Technical terms
Fiber-reinforced polymer (FRP): Composite material comprising high-strength fibres embedded in a polymer resin matrix.
Pultrusion: Continuous manufacturing process for creating constant-section composite profiles with aligned fibres.
Delamination: Separation of composite layers caused by interlaminar stresses or damage initiation.
Digital image correlation (DIC): Non-contact optical method for measuring full-field surface strains and deformations.
Web-flange junction: Interface region where the vertical web meets the horizontal flange in an I- or box-section profile.
References
- DIC study of strain concentrations and damage within web-flange junctions of pultruded GFRP bridge decking. Composites Part A Applied Science and Manufacturing (2024).
- A Review of Fibre Reinforced Polymer Structures. Fibers (2022).
- Effect of Fiber Wrapping on Bending Behavior of Reinforced Concrete Filled Pultruded GFRP Composite Hybrid Beams. Polymers (2022).
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