If the chloride concentration at the surface of a concrete structure is known, the chloride concentration around reinforcements at year t can be estimated and the initiation time of reinforcement corrosion obtained from the concentration and some associated critical value. The accumulating corrosion products then causes the volume of reinforcement to expand, leading to cracking of the concrete surface. Provided that the structure reaches its critical state when surface cracks appear, the time tL is obtained from when the cracks appear. Taking the parameters associated with deterioration to be random variables, the occurrence probability of deterioration is evaluated. Then the optimum concrete cover thickness is obtained based on the concept of least expected cost.
A study of the application of reliability theory to the design of concrete cover Available to Purchase
Research and Development Department, Tokyo Electric Power Service Co., Ltd, 3-3-3 Higashi-ueno Taitou-ku, Tokyo 110, Japan.
Engineering Research Center, Tokyo Electric Power Company, 4–1 Egasaki Tsurumi-ku, Yokohama City 230, Japan.
Department of Civil Engineering, Waseda University, 3-4-1 Okubu, Shinjiku-oku, Tokyo 169, Japan.
Department of Civil Engineering, Tokyo Denki University, Hatoyami Hiki-gun, Saitama 350-03, Japan.
Matsushima M, Tsutsumi T, Seki H, Matsui K (1998), "A study of the application of reliability theory to the design of concrete cover". Magazine of Concrete Research, Vol. 50 No. 1 pp. 5–16, doi: https://doi.org/10.1680/macr.1998.50.1.5
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