Modal Testing and FE Model Updating of a Lively Staircase Structure

Numerical methods to predict human induced vibrations on low frequency stairs. Part 1: Literature review, modelling

“…Characterising the dynamic properties of staircases is a vital part of effectively reducing vibration serviceability issues, this being the main focus of diverse studies [10][11][12]. Setareh [10] addressed how monumental stairs should be modelled in a structural analysis software to reliably predict their natural frequencies.…”

“…The study concluded that the stringer stiffness, weight of the structure, and the inclusion of nonstructural elements such as stair cladding are important factors that need to be accurately included in finite element (FE) staircase models. Belver et al [11] present a case study related to FE modelling, modal testing and FE model updating of a lively staircase. Despite recent advances using modelling techniques, it was observed that there is no guarantee that the initial FE model can estimate the modal properties of the staircase adequately, even when it is very detailed.…”