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April 2010
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Archive for April, 2010

Student Prize Winner 2009

A dynamic programming algorithm for optimization of composite steel box girder bridges under static and dynamic loading
Breiffni Fitzgerald – Trinity College, Dublin

This project proposes and develops a new dynamic programming algorithm for the optimisation of composite steel box girder bridges of single or multi-span under static and dynamic loads.

Displacement transfer function at mid-span for damped three-span bridge

Displacement transfer function at mid-span for damped three-span bridge

The dynamic programming algorithm proposed is based on a combination of EXCEL based optimisation solver and finite element modelling for dynamic analysis. In addition supplemental damping devices are optimally designed. The algorithm is as follows. At first, the bridge considered is subjected to static loads and optimised. The optimal parameters obtained from this static optimisation are then used to create a finite element model of the bridge. This model is analysed dynamically to obtain the natural frequencies of the bridge and the mode shapes. Tuned Mass Dampers (TMDs) are then attached to the bridge at critical locations as defined by the mode shapes and are tuned to the natural frequency of the structure to reduce the structural response. These TMDs are tuned optimally. The composite box girder bridge is thus optimised for static and dynamic loading.

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Committee Meeting – October 2010

Date: 6 October 2010
Time: 17:30
Venue: OCSC Offices

Committee Meeting – September 2010

Date: 8 September 2010
Time: 17:30
Venue: OCSC Offices

Committee Meeting – December 2010

Date: 1 December 2010
Time: 17:30
Venue: OCSC Offices

Committee Meeting – November 2010

Date: 3 November 2010
Time: 17:30
Venue: OCSC Offices

Committee Meeting – July 2010

Date: 28 July 2010
Time: 17:30
Venue: OCSC Offices

Committee Meeting – May 2010

Date: 12 May 2010
Time: 17:30
Venue: OCSC Offices