BEBO Arch System Modelling

BEBO Arch International AG specialises in the development and application of the BEBO System and the design of overfilled reinforced concrete arch structures in general. The BEBO System is a pre-engineered set of precast reinforced concrete arch elements and spandrel wall and wing wall elements, all assembled and secured to a prepared concrete foundation.

BEBO used LUSAS software to carry out a staged construction analysis of its detailed design for an overfilled arch tunnel for the Dobwalls Bypass – the first BEBO Arch structure to be constructed in the UK, and one of many structures worldwide designed by BEBO with the aid of LUSAS software.

Project info

Client: BEBO Arch International

Arch segment installation

Model of backfilling and overfilling stages

Staged construction modelling

BEBO engineers have a lot of experience in the use of finite element analysis software, not only for the design of projects involving soil-structure interaction, but also for a variety of materially nonlinear analysis, particularly of reinforced concrete structures.

On this project, staged construction modelling in LUSAS using nonlinear analysis replicated the entire construction process including the installation of the piles and pilecap; the addition of a fill layer to the level of the existing railway embankment; the installation of the concrete arch segments and initial backfilling to the top of pedestal level. This was then followed by the addition of a series of roller compacted fill layers of 0.5m thickness up to arch crown level with, finally, two, 1.5m overfill layers completing the embankment construction. Excellent agreement between LUSAS and the monitoring results was found.

To assist us with the design of our range of BEBO Arch Bridge Solutions, and for our general structural analysis requirements, LUSAS meets our needs perfectly Gian Nick, Managing Director, BEBO Arch International AG

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