Probabilistic Assessment of Support Scaffold Systems (No. R911)

Abstract

This research report presents comprehensive studies of the effects of uncertainties in material properties, initial geometric imperfections and joint stiffness on the ultimate system strength of multi-storey steel support scaffold systems through a rational statistical framework and a second-order inelastic finite element (advanced) analysis. A total of 36 stick-type steel scaffold systems with Cuplok joints in various configurations (different combinations of jack extensions, number of bays, and lift heights) are considered in the studies. The report also presents a reliability analysis of support scaffold systems to determine system resistance factors that can be used for the design by advanced analysis according to the LRFD statistical framework. The proposed system resistance factors based on the system target reliability index of 3.5 vary from 0.56 to 0.70, depending on the lift height and jack extensions.