4 results on '"Alessandra Aprile"'
Search Results
2. Multiscale Numerical Analysis of TRM-Reinforced Masonry under Diagonal Compression Tests
- Author
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Pietro Gulinelli, Alessandra Aprile, Raffaella Rizzoni, Yves-Henri Grunevald, and Frédéric Lebon
- Subjects
strengthening masonry ,diagonal compression test ,numerical analysis ,interface transmission conditions ,cohesive law ,Building construction ,TH1-9745 - Abstract
The present paper reports an experimental study coupled with a numerical modelling approach to simulate masonry walls strengthened with textile-reinforced mortar (TRM). This innovative reinforcing technique is based on high-strength fibre grids embedded into inorganic matrices, and it has recently been promoted for the seismic retrofitting of historical masonry buildings. In the experimental campaign presented here, two different commercial TRM systems are applied to single-leaf clay masonry panels. The specimens are then subjected to diagonal compression tests in order to evaluate the effects of TRM on the structural performance. The proposed finite element (FE) model, based on an original multiscale approach, is employed to simulate the diagonal compression tests. The numerical results show a very good agreement with the experimental data, including in terms of failure mode. In particular, the approach reproduces the macroscopic behaviour of the masonry panels as regards the force-displacement response, and it allows for the possibility of simulating bed joint sliding and TRM layer debonding.
- Published
- 2020
- Full Text
- View/download PDF
3. Advanced Techniques for Pilotis RC Frames Seismic Retrofit: Performance Comparison for a Strategic Building Case Study
- Author
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Eleonora Grossi, Matteo Zerbin, and Alessandra Aprile
- Subjects
advanced seismic retrofit techniques ,Pilotis RC frame ,seismic performance and cost-benefit analysis ,Building construction ,TH1-9745 - Abstract
Pilotis buildings have widely spread out in developed countries since World War II onwards. From the structural point of view, Pilotis RC frames exhibit substantial lack in ductility capacity and shear resistance localized at the first floor, since they have been mainly realized before the seismic codes’ era. The present study shows the performance comparison of four advanced retrofit techniques when applied to typical Pilotis RC frame designed for gravity loads only according to Italian building code of ‘60s. A preliminary investigation has been performed to select non-linear numerical models suitable to describe the considered RC frame behavior, involving flexural inelastic hinges of RC beams and columns and in-plane axial inelastic hinges of masonry infill panels. Two seismic retrofit projects have been designed at a local level, by strengthening the masonry infilled panels with Fiber Reinforced Cementitious Matrix (FRCM) technique and alternatively by replacing infilled panels with prefabricated panels disconnected from the structure, so that no infill/frame interaction occurs. Two more retrofit projects have been designed at a global level, in order to improve the overall structural performance making use of energy dissipation and, alternatively, base isolation techniques. Nonlinear time history analysis and structural assessment have been carried out for the as-built case as well as for the four retrofit solutions according to Eurocode 8 and Italian Building Code, in order to highlight the structural deficiencies and relative improvements, respectively. Performances offered by the proposed retrofit techniques have been finally compared in terms of structural behavior, expected damage, and economic impact.
- Published
- 2020
- Full Text
- View/download PDF
4. Multiscale Numerical Analysis of TRM-Reinforced Masonry under Diagonal Compression Tests
- Author
-
Frédéric Lebon, Alessandra Aprile, Yves-Henri Grunevald, Raffaella Rizzoni, Pietro Gulinelli, Università degli Studi di Ferrara (UniFE), Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), LiFE (Laboratori Ingegneria Ferrara), Università degli Studi di Ferrara = University of Ferrara (UniFE), and Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
PE8_9 ,numerical analysis ,Diagonal ,0211 other engineering and technologies ,02 engineering and technology ,strengthening masonry ,lcsh:TH1-9745 ,NO ,[PHYS.MECA.SOLID]Physics [physics]/Mechanics [physics]/Solid mechanics [physics.class-ph] ,021105 building & construction ,Architecture ,PE8_4 ,021108 energy ,PE8_3 ,Joint (geology) ,Civil and Structural Engineering ,interface transmission conditions ,diagonal compression test ,business.industry ,Cohesive law ,Diagonal compression test ,Interface transmission conditions ,Numerical analysis ,Strengthening masonry ,Building and Construction ,Structural engineering ,Masonry ,cohesive law ,Compression (physics) ,Finite element method ,Seismic retrofit ,business ,Failure mode and effects analysis ,Geology ,lcsh:Building construction - Abstract
International audience; The present paper reports an experimental study coupled with a numerical modelling approach to simulate masonry walls strengthened with textile-reinforced mortar (TRM). This innovative reinforcing technique is based on high-strength fibre grids embedded into inorganic matrices, and it has recently been promoted for the seismic retrofitting of historical masonry buildings. In the experimental campaign presented here, two different commercial TRM systems are applied to single-leaf clay masonry panels. The specimens are then subjected to diagonal compression tests in order to evaluate the effects of TRM on the structural performance. The proposed finite element (FE) model, based on an original multiscale approach, is employed to simulate the diagonal compression tests. The numerical results show a very good agreement with the experimental data, including in terms of failure mode. In particular, the approach reproduces the macroscopic behaviour of the masonry panels as regards the force-displacement response, and it allows for the possibility of simulating bed joint sliding and TRM layer debondin
- Published
- 2020
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