DAVID COOK University of Bath
Results of a field study of settlement and deformations in three Georgian terraces in Bath and a post-1960 four storey flat block in Grangemouth, Scotland are given. In all cases they are founded on a compressible subsoil. Careful measurements of the vertical alignment as well as settlement enabled the components of Tilt. Bending and Shear to be separated throughout their lengths. It is seen the structures deform significantly more in shear than in bending. Treating the masonry wall as a deep beam, the ratio of shear bending deflections of comparable isotropic beam cases shows some similarity if the stiffness ratio (EIG) for the facades is taken as 30 which is considerably larger than previously assumed. The question of masonry repair methods is discussed, particularly those which would suppress future crack propagation but there seem to be few credible options between complete underpinning and simple cosmetic restoration.