LUSAS Bridge
is used by engineers worldwide for all types of footbridge design.
These case studies
show illustrative uses of the software, with the most recently
added at the top. Country flags relate to the project's
location.
FLOW bridge
Development
of a prototype modular carbon fibre footbridge with the
potential to revolutionise new rail crossings. Using LUSAS allowed
the design team to optimise the staged construction
sequence, accurately predict structural behaviour, and
evaluate key components using localised models.
"The ability to solve different analyses in the same model really eased the design workflow and made analysing an innovative and complex structure fun and enjoyable.”"
Design and
analysis of the first Fibre Reinforced Polymer (FRP) composite
bridge installed at a mainline station in the UK that, on
completion, became the first Grade II listed FRP bridge.
"LUSAS
is my first-choice tool for any of the structural
analysis we do. For the non-standard work we undertake
we need a general-purpose finite element analysis
package that is not narrowly tailored to a particular
market segment. LUSAS fulfils that role, letting us
analyse and design with materials or for applications
not yet well defined in civil engineering codes."
Design of a novel
cable stayed pedestrian bridge that is suspended from the piers
of a road bridge,
involving staged erection analysis, assessment of extreme
loading events, and pedestrian footfall analysis.
"Using
LUSAS allowed us to accurately capture the behaviour of a very
complex structure that included a curved and skewed alignment with
cables that had both vertical and lateral inclinations."
Hossam Abdou, Vice
President, Alfred Benesch and Company.
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.
Design of a visually
stunning, asymmetric cable-stayed pedestrian swing bridge.
MediaCityUK Footbridge is an
asymmetric, cable-stayed, pedestrian swing bridge whose form and
function was dictated by site constraints. The bridge comprises
two spans: a main span, approximately 65m in length, which
traverses the shipping channel of the Canal, and a 18m flared
concrete-filled back span that forms the counterweight to balance
the asymmetric spans during opening,
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.
Staged construction
analysis involving post-tensioning, creep and shrinkage of a footbridge with a unique
asymmetric design and asymmetry in two major planes.
"Modelling
each stage of construction in LUSAS facilitated accurate geometry
control and allowed us to confidently monitor the pylon bending
demands."
John
Boschert,
Structural Engineer, Genesis Structures
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."
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.
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
Design assistance,
thermal assessment, and development of construction method for a
cable stayed swing footbridge with a cranked back span.
Cathedral Green Footbridge is an
award-winning pedestrian and cycle cable-stayed swing bridge. It
has a 30m main span and an 18m cranked back-span that
counterbalances the main deck. The bridge rotates on a pintle
bearing, with a central wheel to support its weight and swings to
one side automatically when the river is in flood.
3D
modelling and eigenvalue analysis of a large number of
steel truss footbridges to derive
mode shapes and mass participation factors to assist
with their design.
"The use of a modular
design approach in conjunction with detailed LUSAS analyses of the
main footbridge types enabled us to design the large number of
footbridges required for the project in a very timely and
efficient manner."
David A Smith,
Regional Head of Bridge Engineering, Atkins
Staged construction
modelling of a low-cost footbridge with time
step analysis of pedestrian crowd loading
Baker
Bridge is an excellent example of a practical but eye-catching
cable stayed footbridge designed for rapid erection and for a
relatively low overall cost. LUSAS
Bridge analysis software was used to assist with the design of the
bridge by modelling all stages of the construction sequence.
Staged erection analysis
of two complex post-tensioned bridge structures
involving 3D linear and nonlinear analysis and cable
tensioning optimisation.
"We used LUSAS Bridge
exclusively for the erection engineering of the Wichita
Bridges and obtained excellent correlation between the
on-site cable stayed measurements and the values that LUSAS
predicted for lift-off"
Analysis and assessment of
the behaviour of a dynamically sensitive footbridge to
pedestrian loading with and without the installation of
a tuned mass damper.
"By
using LUSAS we obtained a good correlation of the measured
frequencies and successfully designed and tested a tuned
mass damper to restrict deck movement for all the pedestrian
loadings that were considered."
Milan
Kalný,
Technical Director, Pontex
Consulting Engineers Ltd.
Static analysis of a steel
and glass retractable footbridge
"Finite
element analysis with LUSAS was essential on this project and proved
that the differential movement between the glass and the steel helix
was within the strain limits of the silicon adhesive."
Phil Snowsil, Senior
Design Engineer, Davy Markham
Analysis of construction
process and installation of glass and steel swing
footbridges with calculation of pre-camber required to ensure
correct closure
"Analysis with LUSAS was needed in order to calculate the amount of pre-camber required to ensure closure due to a 120mm deflection along the length of the cantilever span."
Phil Snowsil, Senior
Design Engineer, Davy Markham
Static, nonlinear buckling
and natural frequency analysis of a tubular steel
lattice footbridge
"Because of the
complex nature of the structure and its S-shaped form, it would
not have been possible for us to be sure of the exact stresses and
forces in the helical members without the use of LUSAS."
Global and local analyses
of a cable stayed swing footbridge
"Using LUSAS
was the only viable way of analysing the structure for the multitude
of loadcases that had to be considered - in effect, we couldn't have
done it any other way."
Eigenvalue analysis of a
spiral-ramped tubular steel footbridge
LUSAS finite element analysis was used to investigate the response of the
structure and in particular to ascertain the modes of vibration for
the 40m-long unsupported length of the spiral section.
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."
LUSAS is a trademark and
trading name of Finite Element Analysis Ltd. Copyright 1982 - 2022. Last
modified: October 14, 2022
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policy.
Any modelling, design and analysis capabilities described are
dependent upon the LUSAS software product, version and option in use.
FLOW bridge
