The ductile behavior of high performance concrete in compression

• Autorzy: Fantilli A. P. , Mihashi H. , Vallini P. , Chiaia B.
• Języki publikacji: EN

Abstrakty

EN

The ductility of High Performance Concrete (HPC) can develop both in tension and compression. This aspect is evidenced in the present paper by measuring the mechanical response of normal vibrated concrete (NC), self-compacting concrete (SC) and some HPCs cylindrical specimens under uniaxial and triaxial compression. The post-peak behaviour of these specimens is defined by a non-dimensional function that relates the inelastic displacement and the relative stress during softening. As a result, in normal and self-consolidating concrete, fracture toughness in compression increases in the presence of active confinement. Moreover, HPC specimens, which can also show strain hardening in tension, provide a very ductile behaviour even in absence of confinement. In particular, during the post-peak stage, the ductility of HPC is comparable with that of NC or SC at 1 MPa of confining pressure. Moreover, the performance of fiber-reinforced composites can be quantified by the distributed confining pressure generated by the fibers. The presence of HPC in compressed columns is therefore sufficient to create a sort of active distributed confinement, and improve both the mechanical behaviour of concrete and its durability.

Słowa kluczowe

EN

ductility; compression; high performance concrete; self-compacting concrete; normal vibrated concrete; confining pressure; triaxial test; fracture toughness

PL

ciągliwość; ściskanie; beton wysokowartościowy; beton samozagęszczalny; beton normalnie zagęszczony; ściskanie trójosiowe; odporność na kruche pękanie

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2010
• Tom: Vol. 56, nr 1
• Strony: 3--18
• Opis fizyczny: Bibliogr. 14 poz., il.

Twórcy

autor

Fantilli A. P.

autor

Mihashi H.

autor

Vallini P.

autor

Chiaia B.

• Department of Structural and Geotechnical Engineering, Politecnico di Torino, Italy,

Bibliografia

• 1. M.A. MANSUR, M.S. CHIN, T.H. WEE, Flexural Behaviour of High-Strength Concrete beams, ACI Structural Journal, 94, 6, 663-674, 1997.
• 2. K.H. KHAYAT, P. PAULTRE, S. TREMBLAY, Structural Performance and In-Place Properties of Self-Consolidating Concrete Used for Casting Highly Reinforced Columns, ACI Materials Journal, 98, l, 371-378, 2001.
• 3. UNI EN 1998-1:2005. Eurocodice 8 - Design of structures for earthquake resistance - Part l: General rules, seismic actions and rules for buildings, pp.229.
• 4. UNI EN 1992-1-1:2005. Eurocodice 2 - Design of concrete structures - Part 1-1: General rules and rules for building, pp. 225.
• 5. N. GANESAN, J. V. RAMANA MURTHY, Strength and Behaviour of Confined Steel Fiber Reinforced Concrete Columns, ACI Materials Journal, 87, 3, 221-227, 1990.
• 6. A. KAWAMATA, H. MIHASHI, H. FUKUYAMA, Properties of Hybrid Fiber Reinforced Cement-based Composites, Journal of Advanced Concrete Technology, l, 3, 283-290, 2003.
• 7. CEB (Comite Euro-International du Beton), „CEB-FIP Model Code 1990”, bulletin d'information n°203-205, Thomas Telford, London, UK, 1993.
• 8. J. G. M. VAN MIER, Fracture Processes of Concrete: Assessment of Material Parameters for Fracture Models. CRC Press, 1996.
• 9. D. C. JANSEN, S. P. SHAH, Effect of length on compressive strain softening of concrete, ASCE Journal of Engineering Mechanics, 123, l, 25-35, 1997.
• 10. A.P. FANTILLI, H. MIHASHI, P. VALLINI, Post-Peak Behaviour of Cement-Based Materials in Compression, ACI Materials Journal, 104, 5, 501-510, 2007.
• 11. P. JAMET, A. MILLARD, G. NAHAS, Triaxial behaviour of a micro-concrete complete stress-strain curves for confining pressures ranging from O to 100 MPa, International conference on concrete under multiaxial conditions, 133-140, Toulouse 1984.
• 12. S.J. FOSTER, J. Liu, S.A. SHEIKH, Cover Spalling in HSC Columns Loaded in Concentric Compression, ASCE Journal of Structural Engineering, 124, 12, 1431-1437, 1998.
• 13. B. CHIAIA, A.P. FANTILLI, P. VALLINI, Post-peak response of confined SCC, In 3rd North American Conference on the Design and Use of Self-Consolidating Concrete (SCC), Chicago 2008.
• 14. A. P. FANTILLI, H. MIHASHI, P. VALLINI, B. CHIAIA, The ductile behavior of HPFRCC in compression, In Ninth International Symposium on Brittle Matrix Composites BMC-9, Warsaw, October 2009.