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Case Studies - Soil-Structure Interaction Modelling

LUSAS is used by engineers worldwide for all types of soil-structural interaction modelling. 

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.

Bridge Case Studies


Integral bridge analysis and design to EC4

  • Analysis and design of steel/composite integral bridges to optimise sizes of steel sections and slab reinforcement bars.

"The use of LUSAS with nonlinear joints modeling the active and passive pressure allowed us to have an integrated model of the deck and the abutments that will be used also for seismic analysis. The use of the steel and composite deck designer was mandatory to enable us to optimize the design in a reasonable amount of time in accordance with relevant Eurocodes."

L. Ferretti Torricelli, Bridge Design Department, SPEA Ingegneria Europea S.p.a.


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


Seismic analysis of viaduct substructures on the Dubai Metro

  • Modelling of concrete viaduct structures involving seismic analysis to AASHTO LRFD to derive design moments from seismic and modified BS 5400 load combinations for use with pile and pier design.

"The use of precast concrete elements for the deck and for key substructure components, and the use of LUSAS software to assist with our design process, all helped to ensure that the viaduct construction progressed as planned."

David A Smith, Regional Head of Bridge Engineering, Atkins


Taiwan High Speed Railway
  • Pile-soil interaction modelling and automated model building for multi-modal spectral response analysis of viaduct structures

"The versatility of LUSAS Bridge coupled with the technical expertise within our Group helped produce an economical design for the extreme seismic performance criteria of the Taiwan project with its demanding programme and construction constraints."

Kandiah Kuhendran, Project Design Manager, FaberMaunsell


Integral abutment bridge design

  • Global analysis and soil structure interaction of an integral abutment bridge structure
"Abutments are of reinforced concrete with steel piles and deck girders embedded in the bank seats transmitting end fixing moments from the deck into the piles. Thermal deck movements are accommodated by soil structure interaction between the piles and the surrounding strata, resulting in flexure of the piles about their weak axis of bending."

Vasco da Gama bridge and approach viaducts

  • Pile/soil interaction and seismic analysis of a cable stayed road bridge and associated approach viaduct structures
"In the substructure analysis, soil degradation was a key consideration and this required an iterative analysis procedure. 2D plane strain finite elements were used to model the soil, together with constraint equations to ensure that only shear deformation was considered."

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Civil & Structural Case Studies


Söderström Tunnel Connector

  • Detailed solid modelling and nonlinear contact analysis of a cable anchored concrete tunnel connector and the surrounding rock to prove the stability of the connector for all considered loading conditions

Load transfer mechanisms between the concrete tunnel and the rock were investigated to ascertain the magnitude of stresses and forces at the connection, in the anchorage cables, and in the rock itself due to permanent, variable and accidental loading to the immersed concrete tunnel.


Devonport Royal Dockyard

  • Nonlinear dynamic analysis of a variety of major concrete structures as part of the multi-million pound modernisation programme of nuclear submarine refit facilities at Devonport Royal Dockyard.

Nonlinear contact joint elements were used to model the lift-off and frictional sliding at the foundation, stop-block and shear-key interfaces. Additional joint elements were used to provide hydrodynamic mass and damping actions on the walls and base-interface.

 

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Software Information

  Bridge / Bridge plus
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green_arrow.gif (94 bytes) Modelling in general
green_arrow.gif (94 bytes) Advanced elements, materials and solvers
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green_arrow.gif (94 bytes) Staged construction modelling
green_arrow.gif (94 bytes) Geotechnical / Soil-structure modelling
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  Additional Information
green_arrow.gif (94 bytes) Linear and nonlinear buckling analysis
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green_arrow.gif (94 bytes) Integral or jointless bridges
green_arrow.gif (94 bytes) Post-tensioning
green_arrow.gif (94 bytes) Concrete modelling
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