ABSTRACT
Settlement distortions to buildings are typically measured in both hogging and sagging modes of deformation using the deflection ratio (Δ/L or DR, defined in Figure 1). Note that the hogging and sagging regions are partitioned by the point of inflexion (i) of the settlement trough. Potts and Addenbrooke (1997) quantified the modification to settlement distortions in terms of the ratio of the measured deflection ratio to the equivalent greenfield value, as presented in Equation 3. This ratio is given the term ‘modification factor’ (MDRhog and MDRsag).
