caa a22 4500 46910872X CHVBK 20180323133103.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF00430043 doi (NATIONALLICENCE)springer-10.1007/BF00430043 Di Pasquale Salvatore Dipartimento di Costruzioni, Università di Firenze, Piazza Brunelleschi 6, 50122, Firenze, Italy aut New trends in the analysis of masonry structures [Elektronische Daten] [Salvatore Di Pasquale] The modern theory of masonry structures has been set up on the hypothesis of no-tension behaviour, with the aim of offering a reference model, independent of materials and building techniques employed. This hypothesis gives rise to inequalities which have to be satisfied by the stress tensor components and, as a dual aspect, to the kinematic behaviour characteristics of media which can be classified as lying between solids and fluids: the structure of the masonry material consists of particles reacting elastically only when in contact. An examination of the plane-stress problem leads us to define, within the prescribed domain under admissible loads, three different subdomains with null, ‘regular', or ‘non-regular' principal stress tensors, respectively. As the boundaries of such subdomains are not known a priori, the problem can be classified as a free boundary value problem. The analysis concerns mainly the subdomains where the stress tensor is ‘non-regular'; and a ‘non-regularity' condition det σ=0 is added to the equilibrium equations. This condition makes the stress problem ‘isostatic' and leads to a violation of Saint-Venant's compliance conditions on strains. Hence there is a need to introduce a strain tensor, not related to the stress tensor, which can be decomposed into an extensional component and a shearing component; we prove that such strains, of the class γσc, are similar to those of the theory of plastic flow. From the point of view of computational analysis the anelastic strains are considered as given distortions; they are computed by means of the Haar-Kármán principle, modified for computational purposes by an idea of Prager and Hodge. Kluwer Academic Publishers, 1992 No-tension materials nationallicence Masonry nationallicence Historical Monuments nationallicence Constrained constitutive equations nationallicence Mechanics of masonry nationallicence Meccanica Kluwer Academic Publishers 27/3(1992-09-01), 173-184 0025-6455 27:3<173 1992 27 11012 https://doi.org/10.1007/BF00430043 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00430043 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Di Pasquale Salvatore Dipartimento di Costruzioni, Università di Firenze, Piazza Brunelleschi 6, 50122, Firenze, Italy aut NATIONALLICENCE 773 0- Meccanica Kluwer Academic Publishers 27/3(1992-09-01), 173-184 0025-6455 27:3<173 1992 27 11012 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer