Description
Book SynopsisThis reference book presents the theory and methodology to conduct a finite element assessment of concrete structures subjected to chemically induced volumetric expansion in general and alkali aggregate reaction in particular. It is limited to models developed by the author, and focuses on how to best address a simple question: if a structure suffers from AAR, how is its structural integrity jeopardized, and when would the reaction end.
Subjects treated are:
â Brief overview of AAR: nature of the chemical reactions, AAR in both dams and nuclear power plants, and how does it impact the mechanical properties of concrete.
â Constitutive model for both the AAR expansion, and concrete nonlinearities (both smeared and discrete crack models).
â Validation of the model along with a parametric study to assess what are the critical parameters in a study.
â Selection of material properties for an AAR finite element simulation, followed by applications in dams and massive rein
Table of Contents
Preface
1 Introduction
1.1 Concrete Composition
1.2 Alkali Aggregate Reactions
1.3 A Brief Review of Finite Element
1.4 A Brief Review of Heat Transfer
1.5 Finite Element Modeling of AAR
1.6 Book Content
1.7 Summary
2 AAR Constitutive Model
2.1 Minimum Requirements for a "Modern" AAR Numerical Model .
2.2 The Model
2.3 Kinetics
2.4 Retardation
2.5 Humidity
2.6 AAR Strain
2.7 Summary
3 Constitutive Model; Concrete
3.1 Introduction
3.2 Nonlinear response of concrete
3.3 The nonlinear continuum model
3.4 Nonlinear Discrete Joint Element
3.5 Summary
4 Validation
4.1 Benchmark Results
4.2 Summary
5 Parametric Study
5.1 Preliminary
5.2 Results
5.3 Summary
6 Material Properties
6.1 Introduction
6.2 Elastic properties
6.3 AAR properties
6.4 Thermal properties
6.5 Reclamation study
6.6 AAR properties through system identification
6.7 On the Importance of Proper Calibration
6.8 Summary
7 Applications
7.1 Arch Gravity Dam; Isola
7.2 Hollow Buttress Dam; Poglia
7.3 Arch Dam, Amir-Kabir
7.4 Arch Dam, Kariba
7.5 Massive Reinforced Concrete Structure
7.6 Summary
8 Micro Model
8.1 A Diffusion-Based Micro Model
8.2 A Mathematical Model for the Kinetics of the Alkali-Silica Reaction
8.3 Summary
9 Prediction of Residual Expansion
9.1 Literature Survey
9.2 Expansion Curve from Delayed Laboratory Testing
9.3 Summary
A Numerical Benchmark for the Finite Element Simulation of Expansive Concrete
A.1 Introduction
A.2 Test Problems
A.3 Presentation of Results
A.4 Results Submission and Workshop
A.5 Acknowledgements
A.6 Contacts
B Merlin
B.1 Introduction
B.2 Arch Dam Preprocessor: Beaver
B.3 Preprocessor: KumoNoSu
B.4 Analysis: Merlin
B.5 Post-Processor: Spider
C Brief Review of the Reaction Rate
C.1 Definitions
C.2 Examples of Simple Reactions
C.3 Complex Reactions
Author Index
Index
