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Creep of concrete is a complex phenomenon that has proven difficult to model. Nevertheless, for many reinforced and prestressed concrete applications, a reasonably accurate prediction of the magnitude and rate of creep strain is an important requirement of the design process. Although laboratory tests may be undertaken to determine the deformation properties of materials, these are time consuming, often expensive and generally not a practical option. In addition, this is not often an option at the design stage of a project when decisions about the actual concrete to be used have not yet been taken. Hence, empirical based design code type models are often used for the estimation of creep deformation, by considering one or more intrinsic and/or extrinsic variables such as concrete stiffness and age at first loading as input. This paper assesses the accuracy of two such models, the fib Model Code 2010 [1] and the RILEM Model B4 [2], when compared with the actual strains measured on a range of South African concretes which were subjected to a compressive strength related uniVALIDATION OF THE FIB 2010 AND RILEM B4 MODELS FOR PREDICTING CREEP IN CONCRETE

architecture, civil engineering, environment

AN INVESTIGATION TO THE COMPARATIVE IMPACT ASSESSMENT OF URBAN FACADES ON PSYCHOLOGICAL ATTRIBUTES OF RESIDENTS IN NEW AND OLD HOUSING AREAS; THE CASE OF JOLFA STREET IN ISFAHAN