Tay road bridge: analysis of chloride ingress variability & prediction of long term deterioration

摘要

the development of reliable methods of predicting the ingress of chlorides into concrete structures is essential for quantitative durability design. Data from the Tay Road Bridge columns has been back-analysed to assess the first 25 years performance of a typical 1960s concrete structure in marine conditions, to predict future deterioration trends and to provide a point of reference form which the magnitude of improvement needed for new construction can be gauged. The Tay Road bridge was built between 1963 and 1966 and its 42 spans are carried on a series of piers supporting twin Reinforced concrete columns rising in height from 5.5 m to 30 m over its 2, 245m length across the Tay Estuary.