scholarly journals Limit analysis of reinforced masonry vaults

2007 ◽  
Vol 29 (3) ◽  
pp. 431-439 ◽  
Author(s):  
P. Roca ◽  
F. López-Almansa ◽  
J. Miquel ◽  
A. Hanganu
Keyword(s):  
Limit Analysis ◽  
Reinforced Masonry ◽  
Masonry Vaults

Recent Developments in F.E. Analysis of FRP Reinforced Masonry Vaults: Case Studies in Italy

2014 ◽  
Vol 624 ◽  
pp. 389-396 ◽  
Author(s):  
Gabriele Milani ◽  
Antonio Tralli
Keyword(s):  
Case Studies ◽  
Limit Analysis ◽  
Piecewise Constant Function ◽  
Emilia Earthquake ◽  
Structural Deterioration ◽  
First Case ◽  
Reinforced Masonry ◽  
Non Linear ◽  
Masonry Vaults ◽  
2012 Emilia Earthquake

Aim of the present paper is the analysis of a series of existing masonry cross vaults exhibiting meaningful structural deterioration and diffused crack patterns, by means of an advanced non-linear and limit analysis software. The approach utilized is a non-standard and non-commercial one and bases both for the non-linear and limit analysis procedure on a FE discretization of the domain by means of rigid infinitely resistant wedges, where all the non-linearity is concentrated on interfaces between adjoining elements [1-3]. When dealing with the non-linear code, a sequential quadratic programming scheme is used at each iteration in order to deal with the deterioration of mechanical properties of interfaces, provided that the actual non-linear behavior is approximated by means of a linear piecewise constant function. Some real case studies of historic buildings in Italy are discussed. The first case study is represented by the structural analysis of a series of existing masonry cross vaults constituting the roof system of the ground floor of the former Caserma Lorenzini (ex Convent of S. Lorenzo) in Lucca, Italy, at the moment subjected to a wide restoration intervention within the so called Piuss project. The second is represented by the cross vaults of a 12th century masonry sighting tower damaged by the 20th may 2012 Emilia earthquake. This medieval tower, called Torre Fornasini, is located in the municipality of Poggio Renatico, about 10 km from Ferrara.

scholarly journals An Adaptive Procedure for the Limit Analysis of FRP Reinforced Masonry Vaults and Applications

2016 ◽  
Vol 9 (3) ◽  
pp. 735-745 ◽  
Author(s):  
Andrea Chiozzi ◽  
Gabriele Milani ◽  
Nicola Grillanda ◽  
Antonio Tralli
Keyword(s):  
Limit Analysis ◽  
Adaptive Procedure ◽  
Reinforced Masonry ◽  
Masonry Vaults

NURBS-Based Upper Bound Limit Analysis of FRP Reinforced Masonry Vaults through an Efficient Mesh Adaptation Scheme

2019 ◽  
Vol 817 ◽  
pp. 205-212
Author(s):  
Nicola Grillanda ◽  
Andrea Chiozzi ◽  
Gabriele Milani ◽  
Antonio Tralli
Keyword(s):  
Upper Bound ◽  
Limit Analysis ◽  
Mesh Adaptation ◽  
Accurate Estimation ◽  
Collapse Mechanism ◽  
Masonry Construction ◽  
Reinforced Masonry ◽  
Nurbs Surfaces ◽  
Masonry Vaults ◽  
Adaptation Scheme

Masonry vaults represent one of the typical structural typologies in historical masonry buildings. The study of the ultimate behavior of masonry vaults, together with the need to design adequate retrofitting techniques, is of high relevance in the optics of the preservation of the cultural heritage. In this paper, a new approach for the limit analysis of masonry construction is applied to FRP reinforced masonry vaults. This approach relies on the representation of geometry through NURBS surfaces, upper bound formulation of limit analysis, idealization of the structure as an assembly of rigid bodies with dissipation allowed only along interfaces, and optimization by means of a mesh adaptation scheme. The presence of FRP strips can be taken into account in easy way, because they can be included simply by adding NURBS surfaces and assigning them an adequate delamination stress value. The efficient mesh adaptation is performed by means of a Prey Predator Algorithm, which has been proven to be very suited for these problems. The strength of the proposed method lies in an accurate estimation of load-bearing capacity and collapse mechanism obtained with a model which requires a very low computational effort.

scholarly journals Experimental Analysis of Dynamic Effects of FRP Reinforced Masonry Vaults

Materials ◽  
2015 ◽  
Vol 8 (12) ◽  
pp. 8059-8071 ◽  
Author(s):  
Marco Corradi ◽  
Antonio Borri ◽  
Giulio Castori ◽  
Kathryn Coventry
Keyword(s):  
Experimental Analysis ◽  
Dynamic Effects ◽  
Reinforced Masonry ◽  
Masonry Vaults

LIMIT ANALYSIS UNDER LATERAL LOADS OF MASONRY VAULTS UPDATED BY Ω-WRAP

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Laura Anania ◽  
Giuseppe D'agata
Keyword(s):  
Limit Analysis ◽  
New Technology ◽  
Fiber Reinforced Polymer ◽  
Lateral Loads ◽  
Concrete Core ◽  
Mortar Joint ◽  
Reinforced Polymer ◽  
Points Of View ◽  
Masonry Vaults ◽  
Lower Bound Limit Analysis

In this paper, the structural behavior under lateral load of a masonry-barrel vault, strengthened by new technology by applied Carbon-Fiber Reinforced Polymer (C-FRP), is discussed from both theoretical and experimental points of view. The C-FRP is applied such as to assume an Ω shape around a concrete core at the vault extrados. A theoretical prediction of ultimate strength was derived in agreement with observations during the experiments (e.g., masonry crushing, FRP rupture, debonding, sliding along the mortar joint). A lower-bound limit-analysis approach was developed that can handle the shear strength of each ideal section given by the Mohr-Coulomb friction law (for the mortar joint). It can also handle other non linear Italian Code relations (for CFRP Ω-Wrap reinforcement) at a given level of normal compressive stress resulting from the previous step.

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