Transverse Deformations and Structural Phenomenon as Indicators of Steel Fibred High-Strength Concrete Nonlinear Behavior

Table 1

Energy dissipation comparison for concrete classes C 50, C 70, and C 90.

Energy dissipation from the graph σc – εc	Concrete class according to Eurocode 2
	C 50	C 70	C 90
Graph exponent, n	2	1.45	1.4
Descending branch	Yes	No	No
Ratio between the area of the parabola to that of the described rectangle, n/(n + 1)	0.667	0.592	0.584
Elastic energy dissipation, Eel	0.125 fc (‰)	0.15 fc (‰)	0.15 fc (‰)
Plastic energy dissipation, Epl	fc (‰)	0.624 fc (‰)	0.642 fc (‰)
Total energy dissipation, Etot	1.125 fc (‰)	1.216 fc (‰)	1.236 fc (‰)
Ductility coefficient, Etot/Eel	9.00	8.10	8.24