Companies have found new and better materials for building structures. FRP cable trays manufacturers are here to explain such materials and their significant features that make these materials ideal for developing new structures. FRP composite materials in bridge applications are to be discussed in this post.
Since past few time, FRP composite bridge deck systems are widely implemented in bridge structures by builders. There are several finished and underway frp deck projects across the world. There are technical difficulties that limit the development of affordable manufacturing methods to create low cost, bulk FRP bridge decks. And the guidelines, lack of comprehensive analysis and design codes for FRP bridge decks are some key reasons that FRP decks have been applied only in demo projects.
To develop analysis and intend guidelines and overcome any potential reluctance to initiate the use of FRP decks, each potential aspect of service life of deck needs to be examined in both experimental and analytical way. There are two key characteristics that are critical in FRP bridge deck applications- stiffness and strength. The stiffness of an FRP deck is explained as the ability of the deck to resist deformation when load is applied.
Strength of the deck is the ability to resist permanent deflection from that applied load. There are other issues related to the use of FRP decks, like dynamic response, efficiency, durability, structural optimization, etc.
FRP composites in bridge engineering
Polymer matrix composite is a subcategory of the composites field. In this field, matrix is a polymer and the reinforcement is a fiber. FRP material is advantageous and especially its corrosion-resistance properties are the reason behind quick adoption to the public sectors. Presently, FRP composites applications have made tremendous changes in several industries, including marine, aerospace, automobile, chemical processing, and electrical products.
Pultruded FRP structural composites
The pultrusion process for manufacturing high performance, constant cross section FRP structural composite components is cost effective technology. The process of pultrusion includes pulling raw materials through a hot steel-forming die with the help of continuous pulling device. The materials used for reinforcement are in continuous forms like fiberglass mat and doffs of fiberglass roving.
The materials are saturated with the resin mixture inside the resin bath and pulled through the curing die. After extracting the component from the die, craftsmen get a cured profile that corresponds to the shape of the die.
As the pultrusion dies are costly, manufacturers do some variations in the cross-sections of shapes of sufficiently high production necessitates the investment of tooling. FRP decks materials are differ in the fiber architecture and resin type.
FRP cable trays manufacturers use polyester resin because of their low cost. However, they prefer vinyl ester resins to construct profiles for corrosive and wet environments.
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