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Final report on Contract No 7210-PR/111, 1 July 1997 to 30 June 2001.

This report addresses some major problems concerning steel reinforcement. Ductility is too low in several reinforcing products available in the European production. An optimised steel rebar and an optimised steel wire have been formulated for a given yield stress of 450 MPa and optimising the ductility parameters. Energy dissipation during low-cycle fatigue tests must be increased to meet expectations of reinforced concrete structure designers, especially in seismic areas. Special attention must be paid to the welding procedures inside the 'plastic hinge'. Experiments on welded cruciform joints demonstrate the technical capability to achieve a joint that does not decrease the original mechanical properties of the parent materials, in terms of both strength and ductility. A set of reinforced concrete columns has been tested under horizontal cyclic loading. Results show the extremely high-energy dissipation in the plastic hinge for all columns, which confirms the choice for the optimised steels.

Additional information

Authors: FRANCHI A, Politecnico di Milano, Milan (IT);SANTORO R, Federacciai, Milan (IT);DEMOFONTI G, CSM, Rome (IT);MICHELIS P, IMMG, Pentili (GR);PIPA M, LNEC, Lisbon (PT);GOMES M, ISQ, Porto Salvo (PT);BIANCO L, Ferriere Nord, Udine (IT)
Bibliographic Reference: EUR 20506 EN (2002), pp.339. Euro: 51.00
Availability: EUR-OP reference: KI-NA-20506-EN-C Available from EUR-OP sales agents URL:
ISBN: ISBN: 92-894-4489-4
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