Proceedings of the International Symposium on `Fundamental Research on Creep and Shrinkage of Concrete' at the Swiss Federal Institute of Technology, Lausanne, 14-17 September 1980

Today research on creep and shrinkage of concrete is diversified to such a degree that specialists working in different areas sometimes find it difficult to understand one-another. Materials scientists are mainly interested in processes on a microstructural level but they do not necessarily understand the relevance of time dependent deformation in structural design. On the other hand engineers who apply simplified model laws in non-elastic structural analysis are not always in the position to judge the limitations implied in their approach. It is generally realized that further development can be stimulated by a more effective exchange of results and ideas among the different groups involved. In an attempt to bridge this obvious gap in September 1980 there was a Conference organized at Swiss Federal Institute of Technology in Lausanne. The papers presented at this meeting covered the wide range starting with microstructural aspects and mechanisms and including constitutive modelling and structural creep analysis. These contributions together with summaries of two panel discussions are being published in this volume. All serious of the meeting have been introduced by invited lectures. These papers will be published in a special volume "Creep and Moisture Effects in Concrete". This special volume is rather to be a general survey of the different areas covered while the present conference proceedings provide a unique selection of research papers. Nowadays time-dependent deformation of concrete can be taken into consideration realistically by computerized structural analysis. Front Matter....Pages I-X Front Matter....Pages 1-1 A Model of Hardened Cement Paste for Linking Shrinkage and Creep Phenomena....Pages 3-13 The Use of Activation Spectrum Theory to Describe Creep in Concrete....Pages 15-26 Deformation Kinetics of Concrete....Pages 27-34 Shrinkage and Swelling of Two Hydrated Alite Pastes....Pages 35-48 Creep and Microstructural Changes in Concrete....Pages 49-61 Isothermal Drying Shrinkage and Wetting Swelling of Hardened Cement Paste....Pages 63-72 Front Matter....Pages 73-73 Experimental Study of the Variability of Shrinkage in Concrete....Pages 75-92 Variability of Creep and Shrinkage of Concrete....Pages 93-108 Creep of Concrete — A Stochastic Quantity....Pages 109-124 Front Matter....Pages 125-125 A Contribution to the Problem of Reversible and Irreversible Creep of Compact Structural Concretes....Pages 127-134 Checking the Principle of Superposition by Testing....Pages 135-148 Drying of Concrete Consequences for the Evaluation of Creep Tests....Pages 149-169 Stress Relaxation of Concrete Structures and Relaxation Tests of Very Old Concrete....Pages 171-178 Rheological Properties at High Temperature of a Concrete with a Crushed Limestone Aggregate and Blast Furnace Cement....Pages 179-191 Creep Effects Under Transient Temperature Conditions....Pages 193-202 Shrinkage of Concrete in Extreme Climate....Pages 203-212 Drying Shrinkage of Symmetrically Reinforced Concrete and Some Estimates of the Creep of Concrete in Tension....Pages 213-225 Deformations of Transverse Sections and Deflection of Flexed Beams Under Sustained Loading....Pages 227-238 Early Shrinkage of Hardening Cement Pastes....Pages 239-248 Front Matter....Pages 249-249 Non Linear Constitutive Equations for Concrete....Pages 251-257 Front Matter....Pages 249-249 Analyses of Shrinkage in Concrete....Pages 259-268 Comparison of Prediction Methods for Creep Coefficients of Structural Concrete with Experimental Data....Pages 269-278 On the Prediction of Creep Functions for Concrete....Pages 279-289 Front Matter....Pages 291-291 Creep and Shrinkage Behavior of Tall Buildings and Long Span Bridges....Pages 293-303 Analysis of Restrained Concrete Structures for Creep and Shrinkage....Pages 305-321 Creep Observation of Prestressed Concrete Bridges....Pages 323-338 Front Matter....Pages 339-339 Prediction of Shrinkage Stresses and Deformations in Concrete....Pages 341-352 Computerized Structural Analysis Applied to Large Span Bridges....Pages 353-367 Numerical Analysis of Creep and Shrinkage in Concrete Structures....Pages 369-379 The Influence of Thermal Creep on the Pperational Behaviour of Complex Structures....Pages 381-403 Viscoelastic Stability Analysis of Shells....Pages 405-412 Stresses and Displacements of Composite and Prestressed Structures....Pages 413-423 Simplified Calculation of the Relaxation of Stress Respecting the Delayed Elasticity....Pages 425-437 Shrinkage and Load Induced Curvature of Reinforced Concrete Beams....Pages 439-449 Prise En Compte Du Fluage Par La Methode Des Forces....Pages 451-458 Comportement D’Une Structure Continue Realisee a L’Aide D’Elements Prefabriques....Pages 459-470 Deformation Des Dalles En Beton Methode Bilineaire Pour Le Calcul Des Fleches....Pages 471-484 Analysis of Linear Visco-Elastic Structures Subjected to Delayed Restraints....Pages 485-496 General and Approximate Method for the Analysis of Linear Visco-Elastic Structures Sensitive to Second Order Effects....Pages 497-508 Front Matter....Pages 509-509 Microstructural Aspects, Mechanisms and Constitutive Modelling....Pages 511-514 Front Matter....Pages 509-509 Constitutive Modelling and Structural Creep Analysis....Pages 515-518 Back Matter....Pages 519-528