The Structural Engineer > Archive > Volume 49 (1971) > Issues > Issue 3 > Correspondence. Creep and Shrinkage of Concrete and their Influence on Structural Behaviour - a Revi
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Correspondence. Creep and Shrinkage of Concrete and their Influence on Structural Behaviour - a Review of Methods of Analysis by Dr. J.M. Illston and Dr. L. England

A field investigation of time-dependent shortening of columns and core walls in a reinforced concrete multistorey structure was recently completed by the Portland Cement Association of America. Strains were measured over a period of four years commencing during the construction period and continuing through subsequent occupation of the building. Diameter of columns, thickness of core walls, strength of concrete, and amount of reinforcement varied throughout the height of the 70-storey structure. Compressive strains at 27 different storeys were measured.