The use of composite materials, such as glass or carbon fibre reinforced polymers, could dramatically reduce costs and traffic
disruption.
It would also not affect the structural reliability of the completed bridges.
Composites are stiff, strong, light, corrosion-resistant materials and have been successfully used in the aerospace and
automotive industries for decades.
Now researchers at Bristol University are looking at the use of advanced composite decks for traffic bridges.
Bridges using advanced composites for the deck and/or the main beams have been built in the USA, UK and Spain.
However, despite its obvious advantages, this novel bridge technology is not yet normal practice within modern bridge
engineering.
A key issue is that very little research has been carried out examining the weathering of the composite materials and how they
react to the loads bridges have to carry, especially where fatigue performance is concerned.
Dr Wendel Sebastian, who is leading the research, said: "Due to their low weights, high stiffness and high strength, advanced
composites are leading to a new generation of lighter and more fuel-efficient aircraft such as Airbus' A350, and also Boeing's
787 Dreamliner which is heading towards 20% better fuel efficiency than traditional aircraft.
"We would like to achieve an equivalent transformation in civil engineering, with advanced composites underpinning step
changes in the economics, sustainability and structural performance of road bridges."
(转自Yahoo!/The Press Association (U.K.) )