Finite Element Analysis (FEA) is an analytical engineering tool that can be used on bridge designs to calculate stress points and other effects of loading and physical forces (such as wind) on the behaviour of the structure. Buro Happold uses state of the art LUSAS software to analyse complex bridge structural forms. Our engineers are experts in 3D Finite Element modelling of both steel and concrete bridges.

FEA offers an unrivalled range of analysis facilities for bridge design and assessment, including seismic, dynamic and fatigue testing. By inputting variables such as deck thickness, materials, traffic movement and lateral loading, the model provides a set of results showing the stresses produced by different load combinations. These predictions are then used to optimise the bridge design and construction process.

We have developed computational techniques using Finite Elements to calculate the dynamic behaviour of pedestrian bridges. As engineers create more lightweight and slender bridges, it is important that vibration frequencies – which can sometimes result in a pronounced ‘wobble’ – are determined early on in the design phase. FEA and modal testing is conducted to identify any structural ‘accelerations’ caused by walking pedestrians and help pinpoint a structural solution to lateral sway.
 
Buro Happold uses a range of cutting edge technologies to solve dynamic problems and test the durability and performance of bridges and highway structures. To ensure we remain at the forefront of bridge engineering – and deliver a high quality service to our clients – we are committed to Research and Development in materials and construction techniques. Recent research has centred on improving bridge load management and the use of Fibre Reinforced Plastic (FRP) in bridge structures.