Assessment of concrete fracture and fatigue damage across multiple load regime

Assessment of concrete fracture and fatigue damage across multiple load regime

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Concrete structures form an essential part of the local and global infrastructure, and their lifespan is usually measured in decades. Many structures such as highway and railroad bridges, railway sleepers, offshore structures and wind turbine foundations are exposed to repeated load and often fail due to fatigue rupture of concrete. Furthermore, the fatigue design of a structure is considered for the ultimate limit state (ULS), while the serviceability limit state (SLS) is missing, i.e., the assessment of the crack width wc, crack length l, and deflection δ. This missing SLS fatigue consideration in standards may lead to an unoptimized structure, which may eventually result in a visible damage of load-bearing structural components. This contribution focusses on the damage assessment of concrete fatigue failure with the whole range of fatigue regimes, i.e. static fracture, low-cycle to high-cycle with more than 1×104 loading cycles. The results of the experimental tests are presented in form of a S-N curve, a load-CMOD curve, a damage-CMOD curve and are providing useful information for future structural design. Additionally, acquisition of CMOD during the cyclic loading allowed for evaluation of the fatigue crack growth rate by Paris’ law.

Concrete structures form an essential part of the local and global infrastructure, and their lifespan is usually measured in decades. Many structures such as highway and railroad bridges, railway sleepers, offshore structures and wind turbine foundations are exposed to repeated load and often fail due to fatigue rupture of concrete. Furthermore, the fatigue design of a structure is considered for the ultimate limit state (ULS), while the serviceability limit state (SLS) is missing, i.e., the assessment of the crack width wc, crack length l, and deflection δ. This missing SLS fatigue consideration in standards may lead to an unoptimized structure, which may eventually result in a visible damage of load-bearing structural components. This contribution focusses on the damage assessment of concrete fatigue failure with the whole range of fatigue regimes, i.e. static fracture, low-cycle to high-cycle with more than 1×104 loading cycles. The results of the experimental tests are presented in form of a S-N curve, a load-CMOD curve, a damage-CMOD curve and are providing useful information for future structural design. Additionally, acquisition of CMOD during the cyclic loading allowed for evaluation of the fatigue crack growth rate by Paris’ law.

Fatigue Concrete S-N field Cycling loading

Fatigue Concrete S-N field Cycling loading

MIARKA, P.; MALÍKOVÁ, L.; RIOS JIMENEZ, J.; BÍLEK, V.

08.12.2025

Elsevier

Online

Procedia Structural Integrity

Procedia Structural Integrity

Nizozemsko

50

44

6

https://www.sciencedirect.com/science/article/pii/S2452321625005281