Engineering analysis and design software
Bridge design and engineering

Case Study

Baker Bridge 

  • Low-cost practical cable stayed footbridge

  • Staged construction modelling

  • Time step analysis of pedestrian crowd loading

Baker Bridge in Exeter, UK, is an excellent example of a practical but eye-catching cable stayed footbridge designed for rapid erection and for a relatively low overall cost. It was designed by Hyder Consulting Ltd for Exeter Chiefs Rugby Club / Devon County Council. Hyder used LUSAS Bridge analysis software to assist with its design of the bridge and built a detailed model to mimic all stages of the construction sequence.

 

Overview

Baker Bridge comprises a single 42m high, steel A-frame tower that carries a three metre wide footway/cycleway an unusually high 12m above carriageway level. The tower supports a front-span of 72m and a back-span of 38m via 4 pairs and 3 pairs of cable stays respectively. The north-side abutment of the shorter back-span is also designed to act as a counterbalance. The legs of the tower are protected against vehicle collision by large concrete bases and feature simple bolted flange joints to speed erection.

To construct the bridge a temporary support tower was erected at the midpoint of the longer span and the steel deck units for both spans were assembled sitting simply supported at the supports. Once all were in place the deck units were welded together to create a continuous deck prior to stressing the cables to a predetermined value and an in-situ concrete deck was cast.

Thick beam elements modelled all members with plate elements representing the concrete deck. Because the footbridge provides the main pedestrian access to a rugby stadium the design of the slender deck required a detailed time-step analysis to investigate any potential dynamic effects that could be induced by the passage of large crowds. The LUSAS pedestrian loading wizard was used to achieve this.

The bridge was completed in 2007 at a total project cost of 650,000.

   

 

Other LUSAS Bridge case studies:

 

Software Information

  Bridge / Bridge plus
green_arrow.gif (94 bytes) Software overview
green_arrow.gif (94 bytes) Modelling in general
green_arrow.gif (94 bytes) Advanced elements, materials and solvers
green_arrow.gif (94 bytes) Load types and combinations
green_arrow.gif (94 bytes) Staged construction modelling
green_arrow.gif (94 bytes) Geotechnical / Soil-structure modelling
green_arrow.gif (94 bytes) Analysis and design
green_arrow.gif (94 bytes) Design code facilities
green_arrow.gif (94 bytes) Viewing results
green_arrow.gif (94 bytes) Software customisation

  Bridge LT
green_arrow.gif (94 bytes) Software overview

  Videos
green_arrow.gif (94 bytes)

  Choosing Software
green_arrow.gif (94 bytes) Software products
green_arrow.gif (94 bytes) LUSAS Bridge LT
green_arrow.gif (94 bytes) LUSAS Bridge
green_arrow.gif (94 bytes) LUSAS Bridge Plus
green_arrow.gif (94 bytes) Software selection

  Software Options
green_arrow.gif (94 bytes) Click to see index
 
  Case Studies
green_arrow.gif (94 bytes)

  Additional Information
green_arrow.gif (94 bytes) Linear and nonlinear buckling analysis
green_arrow.gif (94 bytes) Curved girder analysis
green_arrow.gif (94 bytes) Integral or jointless bridges
green_arrow.gif (94 bytes) Post-tensioning
green_arrow.gif (94 bytes) Concrete modelling
green_arrow.gif (94 bytes) Interactive Modal Dynamics
green_arrow.gif (94 bytes) LUSAS Programmable Interface (LPI)

  General information
green_arrow.gif (94 bytes) Hardware specification
green_arrow.gif (94 bytes) Licencing and Networking options
green_arrow.gif (94 bytes) Software prices
green_arrow.gif (94 bytes) Documentation
green_arrow.gif (94 bytes) Links page
 

Request information

 


LUSAS is a trademark and trading name of Finite Element Analysis Ltd. 
Copyright 1982 - 2017 LUSAS. Last modified: March 02, 2017. Privacy policy

Any modelling and analysis capabilities described on this page are dependent upon the LUSAS software product and version in use.