CURRICULUM VITAE. Dr. Fabrizio Barpi. February 2, 2015
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1 CURRICULUM VITAE Dr. Fabrizio Barpi February 2, Present Position Assistant professor of Structural Mechanics at the Department of Structural, Geotechnical and Building Engineering of Politecnico di Torino. Address: Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino. Tel.: Fax: fabrizio.barpi@polito.it Web: 2 Education 1986 High school diploma from the Technical School Galileo Galilei of Avigliana (Torino) Graduated in Civil Engineering from Politecnico di Torino. Title of thesis: Approaches in geometrically non-linear elasticity State exam to be licensed as a practising engineer Ph.D. in Structural Engineering at Politecnico di Torino. Title of thesis: Numerical models for the study of cracking phenomena in dams. This dissertation deals with the use of the Cohesive Crack (or Fictitious Crack) Model in the analysis of crack propagation problems in Mode I and Mixed mode conditions, with special reference to gravity dam models. Numerical simulations have been carried out for the following tests: three-point bending test, four-point shear test with two notches, four-point shear test with one notch, axial-symmetrical pull-out test, tests on dam models in Mixed (I and II) Mode conditions (including tests in a centrifuge). In all cases it proved possible to obtain results (load-displacement and load-crack mouth opening curves, crack paths, etc.) in good agreement with the experimental data, and scale effect and ductile-brittle transition phenomena were invariably observed. The main problems encountered in the development of the code were the singularity of the crack propagation criterion, due to an isotropic state of stress at the tip of the crack, and the singularity of the determinant of the global stiffness matrix. A new propagation criterion based on maximum energy dissipation has been proposed to obviate the first difficulty. This method was tested out on the gravity dam problem. The second problem was addressed by resorting to the Singular Value Decomposition method. With the aid of a few additional assumptions, this method makes it possible to solve the system of equations in the proximity of a singular point; it was used in all the numerical simulations performed. 3 Teaching Experience Assistant teacher of Structural Mechanics, Faculty of Architecture, Politecnico di Torino Assistant teacher of Structural Mechanics, Aerospace Engineers, Faculty of Engineering, Politecnico di Torino. 2001/2002 Structural Mechanics, Aerospace Engineers, Faculty of Engineering, Politecnico di Torino. 2002/2003 Theory of Elasticity, Aerospace Engineers, Faculty of Engineering, Politecnico di Torino. 2003/2004 Theory of Elasticity, Aerospace Engineers, Faculty of Engineering, Politecnico di Torino. 2004/2007 Advanced Structural Mechanics, Civil Engineers, Faculty of Engineering, Politecnico di Torino. 2007/2009 Structural Mechanics, Civil Engineers, Faculty of Engineering, Politecnico di Torino Structural Mechanics, Architecture, Politecnico di Torino. Advisor of more than 40 graduate projects ( Laurea ). Designer of a website 1 created to improve the learning of Structural Mechanics. The website is designed to allow the interactive use of a number of codes related to Structural Mechanics. These codes, written in Java, are freely available form computers connected to the net, make it possible to solve problems of linear algebra (sum, product, inversion of matrices, 1 Link: delle costruzioni/aerospaziali/
2 Curriculum vitae Dr. F. Barpi 2 solution of systems of linear equations), geometric properties of plane areas, statically indeterminate structures, Mohr s circles, rectangular plates, normal and tangential stresses of plane sections. 4 Research 4.1 Non-conservative Continuum Mechanics/Fracture Mechanics This research activity is mainly focused on the study of concrete structures under constant and cyclic loading. The non linear behaviour of concrete-like materials in tension is characterized by the localisation of strain (strainsoftening). This phenomenon can be analysed accurately through the so-called cohesive crack model which uses the length of the fictitious crack as a control variable. These research topics can be summarized as follows. Size-related phenomenon of bifurcation of equilibrium path. Interaction of viscous phenomena and crack growth (Mode I and Mixed Mode conditions): Phenomenological models (cylinder tests, three point bending tests, dam models), Models based on non-integer derivatives coupled with micromechanical models, Influence of imprecise (fuzzy) parameters on the response of the model. Impact behaviour of concrete (high strain/stress rates) carried out in cooperation with the Department of Civil Engineering and Geosciences of Delft University (The Netherlands) under the European Programme Spatio-temporal instabilities in deformation and fracture. Cyclic loading and crack growth. Dam-foundation joint behaviour. Scale effects on: maximum load and rupture mechanisms, dam model, failure lifetime (creep), fatigue limit (cyclic loading). 4.2 Dynamics of Snow Avalanches Since 2002 has been leading a research group working on a project funded by Istituto Nazionale per la Ricerca sulla Montagna (Italian Institute of Mountain Research): Design guidelines for existing buildings with respect to avalanches hazard. The group is working on the numerical simulation of the dynamics of powder and dense snow avalanches to assess the influence of such events on existing buildings. A short summary follows. Numerical simulation of the dynamics of powder and dense snow avalanches to assess the influence of such events on existing buildings and to produce design guidelines for structures with respect to avalanches hazard. Development and maintenance of an instrumented test site for natural and artificial avalanches (project DYNAVAL and MAP3) Development of a new device for measuring the shear strength of snow specimens in situ, a key parameter in snow mechanics. 5 Projects Funded by the Italian Ministry of Education, University and Scientific Research Participated in the following projects funded by the Italian Ministry of Education, University and Scientific Research: Scale effects, in space and time, on the structural response of concrete dams, grant n (1999/2000), Time effect on ultimate limit state of large concrete dams, grant n. MM (2001/2002), Influence of parameters uncertainties on structural behaviour of concrete dams: long-term cracking, water/fracture interaction, size-effects, grant n (2003/2004), Engineering evaluation of concrete gravity dam safety: an approach based on computational fracture mechanics, grant n (2005/2006). Structural monitoring, diagnostic inverse analyses and safety assessments of existing concrete dams, grant n ESJAP 003 (2008/2010).
3 Curriculum vitae Dr. F. Barpi 3 6 Other projects Participated in the operational programme Italy - France (Alps - ALCOTRA) project DynAval - Dynamique des avalanches: dèpart et interactions ecoulement/obstacles, founded by Valle d Aosta (Obiettivo Cooperazione territoriale europea Italia-Francia (Alpi), ). 7 Grants In 2002 was granted 12750e by Istituto Nazionale per la Ricerca sulla Montagna (Italian Institute of Mountain Research) on the project Design guidelines of existing buildings with respect to avalanches hazard. 8 High Quality Laboratory Since 2004 has been a member of the Experimental Laboratory of Innovative and Recycled Materials for Civil Engineering Infrastructuress. 9 Awards In July 2006 and 2007, among other young researcher of Politecnico di Torino, was awarded a grant of 3000 e to attend international conferences. 10 Peer Review Service Has served as a reviewer for the following international journals: Journal of Engineering Mechanics (ASCE), Computers and Structures, Journal of Strain Analysis for Engineering Design, International Journal of Solids and Structures, Fatigue and Fracture of Engineering Materials and Structures, Rock Mechanics and Rock Engineering. 11 Affiliation Is/was member of: IACM (International Association of Computational Mechanics), EUROMECH (European Mechanics Society), FraMCoS (Fracture Mechanics of Concrete Structures), ESIS (European Structural Integrity Society), AIMETA (Associazione Italiana di Meccanica Teorica e Applicata), GIMC (Gruppo Italiano di Meccanica Computazionale), IGF (Gruppo Italiano Frattura). 12 Conferences Organization He was a member of the technical committee of the international conference First International Workshop on Performance, Protection & Strengthening of Structures under Extreme Loading held in Whistler, Canada, August August 2007 (PROTECT 2007) and Second International Workshop on Performance, Protection & Strengthening of Structures under Extreme Loading held at Shonan Village Center, Hayama (Giappone), August (PROTECT 2009).
4 Curriculum vitae Dr. F. Barpi 4 13 Publications (International Journals with Referee) 1. F. Barpi and S. Valente. Size-effects induced bifurcation phenomena during multiple cohesive crack propagation. International Journal of Solids and Structures, 35(16): , Elsevier Science Ltd. (Great Britain). 2. F. Barpi, G. Ferrara, L. Imperato, and S. Valente. Lifetime of concrete dam models under constant loads. Materials and Structures, 32: , RILEM Publications (France). 3. F. Barpi and S. Valente. Numerical simulation of prenotched gravity dam models. Journal of Engineering Mechanics (ASCE), 126(6): , ASCE Publications (USA). 4. F. Barpi and S. Valente. Fuzzy parameters analysis of time dependent fracture of concrete dam models. International Journal for Numerical and Analytical Methods in Geomechanics, 26: , John Wiley and Sons Ltd. (Great Britain). 5. A. Carpinteri, P. Cornetti, F. Barpi, and S. Valente. Cohesive crack model description of ductile to brittle sizescale transition: Dimensional analysis vs. renormalization group theory. Engineering Fracture Mechanics, 70(14): , Elsevier Science Ltd. (Great Britain). 6. F. Barpi and S. Valente. Creep and fracture in concrete: A fractional order rate approach. Engineering Fracture Mechanics, 70(5): , Elsevier Science Ltd. (Great Britain). 7. F. Barpi. Impact behaviour of concrete: a computational approach. Engineering Fracture Mechanics, 71/15: , Elsevier Science Ltd. (Great Britain). 8. F. Barpi and S. Valente. A fractional order rate approach for modeling concrete structures subjected to creep and fracture. International Journal of Solids and Structures, 41/9-10: , Elsevier Science Ltd. (Great Britain). 9. F. Barpi. Fuzzy modelling of powder snow avalanches. Cold Regions Science and Technology, 40 (3): , Elsevier Science Ltd. (Great Britain). 10. F. Barpi and S. Valente. Lifetime evaluation of concrete structures under sustained post-peak loading. Engineering Fracture Mechanics, 72: , Elsevier Science Ltd. (Great Britain). 11. F. Barpi, M. Borri-Brunetto, and L. Delli Veneri. Cellular-automata model for dense-snow avalanches. Journal of Cold Regions Engineering (ASCE), 21(4): , ASCE Publications (USA). 12. F. Barpi and S. Valente. Modeling water penetration at dam-foundation joint. Engineering Fracture Mechanics, 75/3-4: , Elsevier Science Ltd. (Great Britain). 13. F. Barpi and S. Valente. Subcritical crack propagation under cyclic load of concrete structures. Magazine of Concrete Research, 62(7): , Thomas Telford (Great Britain). 14. F. Barpi and S. Valente. The cohesive frictional crack model applied to the analysis of the dam-foundation joint. Engineering Fracture Mechanics, 77: , Elsevier Science Ltd. (Great Britain). 15. F. Barpi and S. Valente. Failure lifetime of concrete structures under creep and fracture. Magazine of Concrete Research, 63(5): , Thomas Telford (Great Britain). 16. M. Barbero and F. Barpi. Quarry-induced slope instability at a broadcasting transmission plant near Valcava, Lombardia, Italy. International Journal of Geoengineering Case Histories, 2(2): , F. Barpi, M. Barbero, and D. Peila. Numerical modelling of ground-tunnel support interaction using beddedbeam-spring model with fuzzy parameters. Gospodarka Surowcami Mineralnymi (Mineral Resources Management), 4(27):71 87, F. Barpi and D. Peila. Influence of the tunnel shape on shotcrete linings stresses after excavation. Computer- Aided Civil and Infrastructure Engineering, (27): , F. Barpi, S. Valente, M. Cravero, G. Iabichino, and C. Fidelibus. Fracture mechanics characterization of an anisotropic geomaterial. Engineering Fracture Mechanics, (84): , S. Valente, C. Fidelibus, S. Loew, M. Cravero, G. Iabichino, and F. Barpi. Analysis of fracture mechanics tests on opalinus clay. Rock Mechanics and Rock Engineering, 45(5): , F. Barpi and M.A.B. Deakin. The Bélidor bascule bridge design. International Journal for the History of Engineering & Technology, 82(2): , 2012.
5 Curriculum vitae Dr. F. Barpi M. Maggioni, M. Freppaz, E. Ceaglio, D. Godone, D. Viglietti, E. Zanini, M. Barbero, F. Barpi, M. Borri Brunetto, E. Bovet, B. Chiaia, V. De Biagi, B. Frigo, and O. Pallara. A new experimental snow avalanche test site at Seehore peak in Aosta Valley (NW Italian Alps) Part I: preliminary analysis and logistics. Cold Regions Science and Technology, (85): , M. Barbero, F. Barpi, M. Borri Brunetto, E. Bovet, B. Chiaia, V. De Biagi, B. Frigo, O. Pallara, M. Maggioni, M. Freppaz, E. Ceaglio, D. Godone, D. Viglietti, and E. Zanini. A new experimental snow avalanche test site at Seehore peak in Aosta Valley (NW Italian Alps) Part II: engineering aspects. Cold Regions Science and Technology, (86):14 21, M. Barbero, F. Barpi, M. Borri Brunetto, and O. Pallara. An apparatus for in-situ direct shear tests on snow. Experimental Techniques, pages 1 10, M. Barbero, F. Barpi, M. Borri Brunetto, V. De Biagi, G. Olivero, and O. Pallara. Snow pressure on a semiflexible retaining structure. Journal of Cold Regions Engineering (ASCE), E.A. Podolskiy, M. Barbero, F. Barpi, G. Chambon, M. Borri-Brunetto, O. Pallara, B. Frigo, B. Chiaia, and M. Naaim. Healing of snow surface-to-surface contacts by isothermal sintering. The Cryosphere, (8): , 2014.
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