Fatigue Damage for Reinforced Concrete Offshore Structures

by Surendra P. Shah, Northwestern Univ, Evanston, IL, USA,



Document Type: Proceeding Paper

Part of: Civil Engineering in the Arctic Offshore

Abstract:

When concrete structures are subjected to fatigue loading - resulting from ice or wave loads - progressive damage occurs with increasing number of cycles. Nonlinear damage evolution equation is suggested to predict fatigue life of plain concrete subjected to sequential, constant amplitude loading. This approach seems to eliminate the nonconservative aspect of the linear damage law (the Miner hypothesis) and is based on the observed shape of the damage growth relationship. For serviceability based design of reinforced concrete structures, a simple nonlinear relationship is developed to relate the increases in deflection and crack width with the cycle-ratio. The results compare favorably with experimental data.

Subject Headings: Reinforced concrete | Offshore structures | Structure reinforcement | Damage (material) | Concrete structures | Offshore construction | Ice loads

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