An improved fracture approach to investigate the degradation of vibration characteristics for reinforced concrete beams under progressive damage. (October 2022)

• Record Type: Journal Article
• Authors: Pranno, Andrea; Greco, Fabrizio; Lonetti, Paolo; Luciano, Raimondo; De Maio, Umberto
• Is Part Of: International journal of fatigue. Volume 163(2022)
• Publication Date: 2022-10
• Subjects: Structural Health Monitoring -- Reinforced Concrete Beams -- Simulation-Based Damage Detection -- Modal Properties -- Diffuse Cohesive Fracture; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2022.107032
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: Investigation of the vibration characteristics degradation in reinforced concrete beams. An improved fracture approach able to simulate monotonic and cyclic loads is proposed. Static and dynamic damage indicators were evaluated to detect damage occurrence. Comparisons with experiments show the accuracy and completeness of the proposed model. Abstract: This work presents a cohesive fracture modeling approach to investigate the damage effects on the mechanical response of reinforced concrete beams in terms of degradation of vibration characteristics. The proposed model can simulate the diffuse cracking behavior of reinforced concrete beams together with the steel–concrete interaction providing also the static and dynamic response at increasing damage levels including the effects of concrete cyclic behavior. The numerical outcomes were validated through comparisons with experimental results reported in the literature, demonstrating the consistency and the applicability of the proposed numerical model in the framework of "model-based" damage identification procedures.