Society progresses and the need to find solutions that are sustainable, economical and safe increases with this need. New and effective materials have been and still are introduced to engineers. These new and effective materials, such as High Strength steel present safer constructions since they can be utilized to a greater extent of their capacity. However, as materials get more efficient some problem areas arise, one being dynamical issues of structures.
Pedestrian bridges are susceptible to dynamical loads, loads induced by pedestrians and cyclists. Given that these bridges utilize High Strength steel one can suspect that dynamical issues can affect the serviceability of the bridges. A case study of London Millennium Bridge showed that better solutions can impact the dynamical behaviour of structures greatly. On its opening day large lateral deflections of the bridge where recorded as pedestrians walked across the structure. To counteract the large acceleration levels for the bridge deck several different types of dampers are force-fitted into the structure.
The pedestrian bridge designed and analysed in this work showed that vertical movements of the bridge are susceptible to occur at low frequencies.