Bridge analysis, design + assessment

Case Studies - Arch Bridges

LUSAS Bridge is used by engineers worldwide on all types of arch bridge. 

These case studies show illustrative uses of the software, with the most recently added article at the top. Country flags relate to the project's location.

West 7th Street Bridge

  • Design and analysis of what is believed to be the world's first precast network arch bridge, involving post-tensioning analysis, eigen buckling, nonlinear analysis and staged construction modelling.

"Once initial section sizing calculations had been performed, we then used LUSAS to analyse numerous post-tensioning layouts for a variety of construction stages... then, once a tendon layout that satisfied all stress limits had been found, strength checks were made and the tendon profile approved."

Dean Van Landuyt, Principal Engineer, Texas Department of Transportation

Olympic Park Bridges

  • Elastic critical bucking and nonlinear analysis of an exceptionally slender steel tied arch footbridge with steel plate hangers and a single-span integral highway bridge of composite steel box girder construction.

Using LUSAS, Atkins found that existing industry and codified guidance was not always sufficient to ensure that a structure with unusual buckling behaviour was correctly modelled and the behaviour correctly accounted for. 

Assessment of Brick Vaulted Arches at Glasgow Central Station

  • Linear elastic modelling of a multi-span vaulted arch structure for load assessment and nonlinear analysis of a single vaulted arch using a multi-crack concrete material model to confirm RA8 loading.

"Although there was new-build design work on this project, which might have grabbed the headlines from a photographer's point of view, the real crux of this project from a design/assessment perspective was being able to justify the new railway tracks over 90m of old vaulted arches."

Dr. Danny Boothman, Project Engineer, URS.

Navvies Bridge

  • Outline design and Category III design check to Eurocodes of a replacement cycle / footbridge involving linear and nonlinear buckling analyses and dynamic analyses for pedestrian and crowd loading.

"We used modal and transient dynamic analyses to ensure that the response of the structure would remain within the acceptable limits given by EN 1990, using pedestrian excitations from the UK National Annex to EN1991-2."

Antonio Di Caprio, Project Engineer, Capita Symonds.

BEBO Arch System Modelling

  • Soil-structure interaction modelling and staged construction analysis of all backfilling and overfilling stages of the first BEBO arch structure to be built in the UK.

"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. 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

New Mizen Head Footbridge

  • Structural assessment of historical ageing concrete through-arch structure and a staged construction analysis of a new replacement structure constructed during the sequential demolition of existing structure
"It was a very interesting project, not only because of its complexity, but because of the project timescale we used variations of our LUSAS model for assessment, design and construction over a period of 10 years."

Kieran Ruane, Technical Director, RPS Consulting Engineers Ltd.

Redhayes Bridge

  • Detailed linear, noninear and pedestrian moving-load and steady-state analysis to assist in the development of the first major highway infrastructure project designed and constructed to Eurocodes in the UK.
This 82m span twin-arch bowstring bridge was developed with the aid of LUSAS bridge analysis software and on completion was believed to be the first major highway infrastructure project designed and constructed to Eurocodes in the UK.

Ponte della Musica

  • Natural frequency, forced vibration analysis and nonlinear buckling analysis of a steel arch pedestrian bridge.

"In addition to using LUSAS for dynamic analysis of the structure; for both natural frequency and forced vibration, we also used it to perform nonlinear bucking analysis of the two large arches as well as for the design of sections using output derived under static load combinations, for both trams and buses, and also for large crowd loading."

Davood Liaghat, Bridge Team Leader at Buro Happold

Michigan's I-94 Gateway Arch Bridges

  • Optimization of arch profiles, vehicle load optimisation, and examination of hanger forces and stressing requirements

"The arch optimization phase was greatly enhanced by the result processing facilities in LUSAS and the ease with which the geometrical outline of the structure could be manipulated."

Dr Hiba Abdalla, Senior Designer, Alfred Benesch

Watergate Bridge

  • Linear and nonlinear buckling analysis and localised connection modelling for a steel arch road bridge

"LUSAS was used throughout the design, from preliminary sizing of members right through to the detailed design of the more complex fabricated elements. It helped us to provide the client with an efficient, aesthetically pleasing structure."

David Doyle, Structural Engineer, Roughan & O’Donovan

Forsmo Bridge, Sweden

Forsmo Bridge

  • Assessment of a steel truss arch railway bridge using iterative model development from strain gauge results to assess Ultimate, Serviceability and Fatigue Limit States.
"Ramboll successfully used strain gauge measurements on the Forsmo Bridge in Sweden to fine-tune a LUSAS Bridge model prior to carrying-out an in-depth assessment of the structure for a proposed increase in freight train axle loading."

Kingston Bridge widening project

Widening of Kingston Bridge

  • 2D plain stress analysis of reinforced concrete arch bridge widening scheme.

Newark High Speed Rail Bridge

  • Detailed dynamics analysis using Interactive Modal Dynamics techniques
"LUSAS Bridge analysis software was used to carry out detailed dynamic analysis for their client Railtrack London North Eastern. The Interactive Modal Dynamics (IMD) techniques used greatly reduced the time required to assess the dynamic response of the structure for numerous combinations of different moving train loads and speeds."

Namdo Bridge

  • Linear static analysis to optimise arch/girder stiffener arrangement

"LUSAS is good at modelling this kind of problem. Its shell and solid elements are easy to use, and the ability to plot results on selected parts of the model allows us to check the stress levels in a very straightforward manner. This is one of the many benefits in using LUSAS on this and other projects".

Joonsang Son, Engineer, Sambo Engineering

Gateshead Millennium Bridge

  • Staged construction and nonlinear dynamic analysis of a cable stayed opening footbridge

"Using LUSAS was essential on the design of this bridge because a full 3D staged construction analysis to model the construction sequence, and a step-by-step integration with large angles, to model the opening and closing sequence was required."

Shapour Mehrkar-Asl, Project Engineer, Ramboll

York Millennium Footbridge

York Millennium Bridge

  • Linear, nonlinear and dynamic analysis of a cable stayed footbridge with staged construction checks


"By using LUSAS, the entire philosophy of the design, and of pushing back the boundaries of engineering, could be met. The computer modelling enabled us to provide a very slender, elegant, and cost-effective structure that previously could not have been designed with confidence."

Des Mairs, Partner, Whitby Bird

Masonry arch assessment

  • Linear and nonlinear analysis of a medieval masonry arch structure to prove load capacity


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green_arrow.gif (94 bytes) Footbridge design
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green_arrow.gif (94 bytes) Linear and nonlinear buckling analysis
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Any modelling, design and analysis capabilities described are dependent upon the LUSAS software product, version and option in use.