Articles about Composite

EuCIA publishes update on future Eurocode for composites

As 2022 continues to be an extremely busy time for Lifespan Structures we are pleased to announce that Steven Dunn has recently joined to further strengthen our specialist team. A civil engineer with over 25 years of experience in providing technical and commercial support to Clients, specifiers and contractors he has strong knowledge in specialist areas including structural concrete repair, structural strengthening utilising carbon fibre plate (CFRP), composites, adhesives & ultra-high modulus plates.

We have published a technical paper to help clients and specifiers understand the significant differences in terms of installation, performance and long term maintenance of the different types of FRP bridge solutions that are available. There are two generic types of FRP composite bridges and they have quite different performance characteristics and maintenance requirements, so it is important for clients to understand the differences at the procurement stage. Moulded bridge decks are generally manufactured in a mould with dry fibres laid in specific orientations with a core material to produce a sandwich construction.

The construction industry is committed to reducing the environmental impact of its activities. The Construction 2025 joint strategy from the UK Government and industry, working in partnership, sets a vision, which includes 50% lower emissions, 33% lower costs and 50% faster delivery. Using FRP composites in place of steel and concrete for bridge construction will deliver this vision now. The carbon and energy embodiment is significantly reduced at the construction stage and still further during the 100-year minimum service life.

The existing skewed reinforced concrete footbridge had come to the end of it life, so an FRP Replacement was selected to provide reduced maintenance in the tree enclosed environment over the Gutter.  Following completion of new abutments and associated retaining walls, the lightweight, preformed, replacement allowed fast and simple installation on site using a lorry mounted crane, to both transport and lift the bridge into place.  The colour scheme was selected to match the clients requirements.

Lifespan Structures FRP cycleway Bridges on Horsey Way, Eastbourne, were highly commended at the 2018 ICE South East England Engineering Excellence awards in the best infrastructure category..no mean feat when going up against much larger schemes, congratulations to all involved in the project! The new Horsey Cycleway crosses a wetlands area where two footbridges with service vehicle access were required to cross waterways on the route.  Due to the poor ground conditions the bridges needed to be lightweight to aid installation and reduce the abutment loadings.  The client, had already used an FRP composite footbridge on a previous scheme and commissioned Lifespan Structures to design and manufacture the two FRP composite Footbridges.  The bridges were both 3.0m wide  and had clear spans of 14.8m and 10.6m with respective deck weights of 5600kg and 3350kg.

Off site construction, means bridge production can continue all year round, and minimises installation times. This bridge replaces a corroded steel structure which had reached the end of its service life.

A small bridge, just 5m span, used to gain public access across a drainage ditch into a local nature reserve. The client was concerned that a traditional timber structure would have reduced durability due to damp environment, so selected the FRP option to reduce maintenance and subsequent whole life cost.  Its very well used by a lot of happy, wet and very muddy dogs!

[caption id="attachment_777" align="alignnone" width="300"] New FRP footbridge gives path users a safe route away from traffic.[/caption]
Our latest FRP bridge takes the route of a new footpath across a stream and safely away from a road.  The low maintenance FRP solution, in an environment where a timber bridge would have a significantly lower life before major maintenance is required, means significantly reduced whole life costing. The fast procurement and off site construction allowed installation in time for spring and summer season.

We are currently offering our CPD presentation called 'Bridging the Gap', if this is of interest please get in touch.  The presentation is particularly suited to local authority bridge engineers and consulting engineers who provide bridge services. The presentation will covers the following topics to introduce the concept of using FRP materials rather than steel, timber and concrete.  - Introduction to FRP composites
 - History of FRP composites in construction
 - Recent case studies
 - Benefits
 - Cost comparisons with traditional materials
 - Environmental benefits
This presentation will inform attendees of the significant benefits so that the FRP composite material option can be included in appropriate future proposals for the benefit of clients.