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Abstract

The effects of friction between materials are an essential part of temporary work's falsework designs. There are four main types of friction which are: static, sliding, rolling and fluid friction with the first three occurring between solid surfaces. Albertini et al. (2021, p. 1) state that “Static Friction is the maximal shear load that can be applied to an interface between two solids before they start to slide over each other”.
In temporary works, static friction between contact surfaces aids the distribution of local restraint and lateral forces in many applications such as temporary foundations installed on inclined surfaces, bridge beams landing on temporary supports or nylon shims and temporary stability of precast concrete elements (British Standards Institute, 2019).
In the current British Standard BS 5975 (“Code of practice for temporary works procedures and the permissible stress design of falsework”), there are four checks required for a falsework design. These are structural strength, lateral stability, overturning and positional stability. Structural strength incorporates the analysis of axial loads, bending moments, shear forces, bearing stresses and deflection characteristics to aid the selection of individual elements such as scaffold tubes. Lateral stability highlights the need to check forces in the horizontal direction with the potential need of including bracing within the design. Overall stability checks that a falsework structure can withstand overturning as a whole and positional stability focuses on lateral restraint by either friction or mechanical connection, the latter being the focus of this investigation.

Course: Civil Engineering - MEng - U0178178YC

Date Deposited: 2023-10-11

URI/permalink: https://library.port.ac.uk/dissert/dis14195.html