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Limit analysis of loaded out-of-plane rubble masonry : a case study in Portugal
Milani, G.; Esquivel Fernández, Yhosimi Washington; Lourenço, Paulo B.; Riveiro, Belén; Oliveira, Daniel V.An integrated methodology for the characterization of the response of rubble masonry is presented. The behaviour at collapse of a wall belonging to the Guimarães castle (Portugal) is investigated through a rigid-plastic homogenization procedure, accounting both for the actual disposition of the blocks constituting the walls and texture irregularity, given by the variability of block dimensions. A detailed ...
Structural analysis of a quasi-random masonry wall : geometry details, homogeni...
Lourenço, Paulo B.; Esquivel Fernández, Yhosimi Washington; Milani, G.In many countries, historical buildings were built with masonry walls constituted by random assemblages of blocks and stones of variable dimensions. The analysis of historic masonry structures requires often complex and expensive computational tools that in many cases are difficult to handle, given this condition of large variability of masonry. The present paper addresses a methodology for the characterization...
Characterization of the response of quasi-periodic masonry : geometrical invest...
Milani, G.; Esquivel Fernández, Yhosimi Washington; Lourenço, Paulo B.; Riveiro, Belén; Oliveira, Daniel V.In many countries, historical buildings were built with masonry walls constituted by random assemblages of stones of variable dimensions and shapes. The analysis of historic masonry structures requires often complex and expensive computational tools that in many cases are difficult to handle, given this large variability of masonry. The present paper validates a methodology for the characterization of the ultim...
Simple homogenized model for the non-linear analysis of FRP strengthened masonr...
Milani, G.; Lourenço, Paulo B.A suitable and simple two-step model able to predict the non-linear response of FRP strengthened 13 three-dimensional masonry structures is presented. In the first step, non-strengthened masonry is 14 substituted by a macroscopically equivalent homogeneous material through a kinematic model 15 based on finite elements and working on a heterogeneous assemblage of blocks. Non-linearity is 16 concentrated exclusiv...
Simple homogenized model for the non-linear analysis of FRP strengthened masonr...
Milani, G.; Lourenço, Paulo B.The homogenized masonry nonlinear stress-strain curves obtained through the simple micromechanical model developed in the first part of the paper are here used for the analysis of strengthened masonry walls under various loading conditions. In particular, a deep beam and a shear wall strengthened with fiber-reinforced polymer (FRP) strips are analyzed for masonry loaded in-plane. Additionally, single and double...
3D non-linear behavior of masonry arch bridges
Milani, G.; Lourenço, Paulo B.In this paper, the static non-linear behavior of masonry bridges is numerically analyzed by means of a 3D FE numerical code. In particular, the three dimensional behavior of the structures when subjected to eccentric loads, the actual 3D geometry of the bridges (particularly important when skew arches are analyzed) and the strengthening effect induced by the backfill are considered. The code is non-commercial ...
A simple homogenized model for the non-linear analysis of FRP strengthened maso...
Milani, G.; Lourenço, Paulo B.A two-step model able to predict the non-linear response of FRP strengthened threedimensional masonry structures is presented. In the first step, non-strengthened masonry is substituted by a macroscopically equivalent homogeneous material through a kinematic model based on finite elements and working on a heterogeneous assemblage of blocks. Non-linearity is concentrated exclusively on joints reduced to interfac...
FE homogenized limit analysis code for masonry buildings
Milani, G.; Lourenço, Paulo B.In this paper, a FE homogenized limit analysis code for the collapse analysis of 3D masonry buildings subjected to horizontal actions is presented. In the code, masonry is modelled through a fictitious macroscopic homogeneous material. Masonry macroscopic mechanical properties are obtained by means of a recently presented equilibrated limit analysis approach performed on a suitable unit cell, which generates th...
Computational advances in masonry structures : from mesoscale modeling to engin...
Lourenço, Paulo B.; Oliveira, Daniel V.; Milani, G.Masonry is a composite material that can be defined as a material incorporating a visible internal structure and having a low strength in tension. The latter characteristic has shaped most civil engineering structures up to the advent of reinforced concrete and iron/steel. The paper will detail two separate modelling issues: micro-modelling and homogenisation techniques, which represent both a popular and activ...
Monte Carlo homogenized limit analysis model for randomly assembled blocks in-p...
Milani, G.; Lourenço, Paulo B.A simple rigid-plastic homogenization model for the limit analysis of masonry walls in-plane loaded and constituted by the random assemblage of blocks with variable dimensions is proposed. In the model, blocks constituting a masonry wall are supposed infinitely resistant with a Gaussian distribution of height and length, whereas joints are reduced to interfaces with frictional behavior and limited tensile and c...
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