Research at structural concrete laboratory
Repeated loading, fatigue and influence of the load duration
Concrete long-term behavior is not limited to deformations caused
by creep and shrinkage. Inelastic deformations are also caused by
high levels of stresses. These deformations, due to microcracking
phenomena in concrete, are related to fatigue under sustained
loading and can also lead to failure of concrete under compression
in the long term.
This phenomenon has been investigated by the Structural Concrete Laboratory by developing a constitutive model of concrete that includes the development of microcracking in concrete. This model has been validated by an experimental campaign and has led to further developments (constitutive laws for concrete) that are integrated in the research activities of the Laboratory.
- Fernández Ruiz M., Zanuy C., Natario, F., Gallego, J. M., Albajar, L., Muttoni A.Influence of fatigue loading in shear failures of reinforced concrete members without transverse reinforcement, Journal of Advanced Concrete Technology, V. 13, 2015, pp. 263-274.
- Natário F., Fernández Ruiz M., Muttoni A., Experimental investigation on fatigue of concrete cantilever bridge deck slabs subjected to concentrated loads, Engineering structures 89, 2015, pp. 191-203.
- Fernández Ruiz M., Muttoni A., Gambarova P., Relationship between nonlinear creep and cracking of concrete under uniaxial compression, Journal of Advanced Concrete Technology, Vol. 5, No 3, Japan, 2007, pp. 383-393.