Mott MacDonald's expertise in the analysis and design of bridges
covers all aspects of time dependent loading such as seismic,
aerodynamic, railway live load and pedestrian.
Dynamic Analysis shapeProjects for clients in
Taiwan, Hong Kong, Korea, Italy, USA and India have involved the
need to carry out seismic design and analysis of major crossings.
This work includes analysis for earthquakes using hand
calculations, modal superposition and transient step-by-step
dynamic analysis. Examples of major projects include Taiwain's
Taichung Beltway, Korea's Kayang Bridge and Hong Kong's Tsing Ma
Bridge.
We're currently undertaking a research project with the University
of Newcastle to explore new methods of carrying out dynamic
analysis of railway bridges.
Vibration of footbridges due to the action of pedestrians has
become a key issue in the design of lightweight pedestrian
crossings. A key pedestrian bridge we've contributed to includes
the Hungerford Millennium footbridge at Westminster in central
London. The assessment of synchronous unintentional pedestrian
excitation has been undertaken using time history methods and modal
techniques.
To assess the effects of wind buffeting loads, analysis of long
span bridges such as Hong Kong's Stonecutters Bridge and Tsing Lung
Bridge and Korea's Incheon Bridge were carried out. The static,
quasistatic and dynamic wind loads are considered to produce a more
accurate and economic design, which would be achieved from
conventional codified rules.
