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Collapse prediction and creep effects
Lourenço, Paulo B.; Henriques, J. PinaThe recent collapse of famous historical constructions attributed mainly to the time-dependent behaviour of masonry has driven the attention of the technical community over this issue. Numerical analyses in which units and mortar are individually represented have proven to be of great interest to understand the phenomena at the level of the masonry constituents. Nevertheless, before analysing the influence of l...
A contribution for the understanding of load-transfer mechanisms in multi-leaf ...
Binda, L.; Henriques, J. Pina; Anzani, A.; Fontana, A.; Lourenço, Paulo B.Predicting the behaviour of multiple-leaf masonry walls is a challenging issue, given the influence of a wide range of factors as the mechanical properties of the leaves, the leaves dimensions and the way the leaves are connected to each other. In the present paper, novel experimental results in large three-leaf wallets subjected to shear and compression are introduced together with a careful numerical interpre...
Masonry compression : a numerical investigation at the meso-level
Henriques, J. Pina; Lourenço, Paulo B.The analysis of masonry assemblages under compression using detailed modelling strategies in which units and mortar are modelled separately is a challenging task. Sophisticated standard non-linear continuum models, based on plasticity and cracking, are widely available to represent the masonry components but such models overestimate the experimental strength of masonry prisms under compression. Alternative mode...
Validation of analytical and continuum numerical methods for estimating the com...
Lourenço, Paulo B.; Henriques, J. PinaThe advances in computational mechanics witnessed in the last decades have made available a large variety of numerical tools. Sophisticated non-linear models are now standard in several finite element based programs. This paper addresses the ability of continuum numerical methods, based on plasticity and cracking, as well as on analytical methods to provide reliable estimations of masonry compressive strength. ...
Masonry micro-modelling adopting a discontinuous framework
Henriques, J. Pina; Lourenço, Paulo B.Several continuous and discontinuous micro-modelling approaches for masonry assemblages are currently under investigation by the authors. The aim is to find a model that provides a suitable description of the material behaviour under compression. Firstly, the behaviour under short-term loading is being considered and, in a later stage, also long-term loading will be addressed. The present paper illustrates the ...
Modelling of masonry creep and damage
Henriques, J. Pina; Lourenço, Paulo B.; Krakowiak, Konrad J.The problems related to the analysis of ancient constructions are gigantic due to the difficulties in characterizing the geometry, the materials, the sequence of construction, the existing damage and the building processes. A difficult aspect in the repair and strengthening of existing structures is the long-term behaviour of masonry. Safety assessment has been greatly influenced by the collapse of monumental b...
Masonry under compression : failure analysis and long-term effects
Henriques, J. PinaTese de doutoramento em Engenharia Civil. ; The work presented in this thesis has been developed at the Department of Civil Engineering of University of Minho, Portugal, and at the Department of Structural Engineering of Politecnico di Milano, Italy. Recent sudden collapses of famous historical buildings, as the Pavia Civic Tower in 1989 or the Noto Cathedral in 1996, has drawn the attention of researchers to ...
Testing and modelling of multiple-leaf masonry walls under shear and compression
Henriques, J. Pina; Lourenço, Paulo B.; Binda, L.; Anzani, A.Predicting the behaviour of multiple-leaf masonry walls is a challenging issue, given the influence of a wide range of factors as the mechanical properties of the leaves, their dimensions and the way they are connected to each other. In the present paper, experimental results in large specimens are carefully reviewed together with numerical interpretation of the shear and compressive behaviour of multiple-leaf ...
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