Intra walker variability of footfall vibration and the effects of walkers’ mass and carrying loads
MetadataShow full item record
Excessive floor vibration in buildings can make occupants uneasy and many prediction methods of varying de% gree of sophistication have been developed over the years to assist engineers in the prediction of footfall vibra% tion. Prediction methods categorised as “impulse response” are often applied to relatively stiff floors. For im% pulse response methods, the predicted footfall vibration is proportional to a nominal walker impulse which is de% termined by the walker characteristics (such as stepping frequency), as well as the underlying floor parameters (such as modal mass and fundamental frequency). Among the reviewed impulse response methods, the de% pendence of the mass of the walker on the impulse is not implemented unanimously. This paper examines the influence of walker mass on the response of a relatively stiff floor. Up to 10 walkers of varying mass are considered, with each walker traversing the bay of interest at different stepping frequencies and carrying varying loads within a backpack. For each configuration, the walker traverses the bay at least 10 times to account for intra%walker variations between traversals, which are also explored.