
Başlık:
Damage and Cracking of Concrete Structures : From Theory to Practice.
Yazar:
Mazars, Jacky.
ISBN:
9781394185979
9781394185955
Fiziksel Tanımlama:
1 online resource (299 pages)
İçerik:
Cover -- Title Page -- Copyright Page -- Contents -- Foreword by Franz-Josef Ulm -- Foreword by Pierre Labbé -- List of Notations -- Introduction -- Chapter 1. Mechanisms of Deformation and Failure of Concrete -- 1.1. Concrete: a material that is both widespread and misunderstood -- 1.2. Composition and behavior of concrete at an early age -- 1.2.1. Concrete curing -- 1.2.2. Consequences of curing and phenomena related to the aging of concrete -- 1.3. Main aspects of the mechanical behavior of concrete -- 1.3.1. Concrete under uniaxial loading -- 1.3.2. Concrete under multiaxial loading -- Chapter 2. Damage Concept and Its Applicability to Concrete -- 2.1. Damage concept -- 2.1.1. Miner cumulative damage law -- 2.1.2. Katchanov's progressive damage law -- 2.1.3. Elasticity-damage coupling -- 2.2. Theoretical bases of damage mechanics -- 2.2.1. Elasticity-damage coupling -- 2.2.2. Isotropic damage theory -- 2.2.3. Damage threshold and notion of loading surface -- Chapter 3. Damage Modeling -- 3.1. Mazars models for monotonous loadings -- 3.1.1. Constitutive equations -- 3.1.2. Using the model (uniaxial case) -- 3.1.3. Strengths and weaknesses of the Mazars model -- 3.2. Model for cyclic loadings: the ì model -- 3.2.1. Concept of effective damage variable -- 3.2.2. Constitutive equations -- 3.2.3. Response of the ì model under various types of loading -- 3.2.4. Adaptation of the ì model to the case of confined loadings -- Chapter 4. Numerical Calculation of Damage -- 4.1. Reminders on concepts governing the use of finite elements -- 4.2. Principle flowcharts -- 4.2.1. Flowchart for the Mazars model -- 4.2.2. Flowchart for the ì model -- 4.3. Data preparation -- 4.3.1. Identification of modeling parameters -- 4.4. Concrete fracturing energy -- 4.4.1. Intrinsic and extrinsic energy -- 4.4.2. Crack band concept, Hillerborg regularization.
4.5. Non-local damage concept -- Chapter 5. Applications to Common Reinforced Concrete Structural Elements Cases -- 5.1. 2D FE calculation -- 5.1.1. Details of the experimental program -- 5.1.2. Numerical processing -- 5.1.3. Results -- 5.2. Calculations by Timoshenko enriched beam elements -- 5.2.1. Strengths and weaknesses of the multifiber beam description -- 5.2.2. Bias of results from the choice of material parameters -- 5.2.3. Multifiber beams and strain localization -- 5.2.4. Enriched multifiber description and use of suitable parameters -- 5.2.5. Simulations based on the enriched multifiber description -- 5.3. Multifiber calculations and access to cracking indicators -- 5.3.1. Damage fields -- 5.3.2. Opening of cracks -- Chapter 6. Modeling of Situations Related to Specific Loadings -- 6.1. Simulation of velocity effects -- 6.1.1. Analysis resulting from the experiment -- 6.1.2. High-velocity loading: application to Spalling tests -- 6.1.3. Loading at medium velocity: impact on a reinforced concrete beam -- 6.2. Simulation of the effects of concrete maturation -- 6.2.1. Problems posed by the behavior of concrete at an early age -- 6.2.2. Case of a beam in a situation of restrained shrinkage -- 6.2.3. Thermomechanical model of concrete at an early age -- 6.2.4. RG8 test: application and results -- Chapter 7. Structures Combining Beams and Planar Elements -- 7.1. Simulation of the behavior of a reinforced concrete wall -- 7.1.1. Model for structural walls: equivalent reinforced concrete -- 7.1.2. Application to the SAFE experiment shear wall case -- 7.2. Application to a structure combining walls, beams and columns -- 7.2.1. Enriched ERC modeling -- 7.2.2. Modeling the response of the SMART model -- 7.3. Calculation combining 2D finite elements and multifiber beams -- 7.3.1. Case study: loss of bearing capacity of a column in a structure.
7.3.2. Calculation-experiment comparison results -- 7.4. Conclusion -- Chapter 8. Assessment of Cracking by Limit Analysis -- 8.1. Characterization of cracking: case of homogeneous fields of tensile elements -- 8.1.1. Limit analysis and yield design theory -- 8.1.2. Case of reinforced concrete beams in bending -- 8.2. Tie rod cracking -- 8.2.1. Localized cracking and diffuse damage -- 8.2.2. Behavioral law for concrete in the diffuse scheme -- 8.2.3. Application to an experiment on tie rods carried out at EPFL -- 8.3. Homogeneous field created by concrete maturation within a cylindrical wall -- 8.3.1. VeRCoRs program and model -- 8.3.2. Mesh of the gusset and temperature conditions -- 8.3.3. Creep, shrinkage and mechanical properties -- 8.3.4. Mechanical calculation -- 8.3.5. Principal results and comparisons with in situ measurements -- 8.4. Conclusion -- Chapter 9. Exercises and Supplements -- 9.1. Determining mechanical characteristics from experimental curves -- 9.2. Mazars model: axisymmetric triaxial loading under compression -- 9.3. Local and non-local damage -- 9.3.1. Example of a concrete bar under direct tension -- 9.3.2. Local model response: impact of the number of elements -- 9.3.3. Non-local damage problem -- 9.3.4. Objective calculation with a local model: Hillerborg method -- 9.3.5. Conclusion -- 9.4. On the ì model -- 9.4.1. Reaching the damage threshold, load-unload criterion -- 9.4.2. On the stress triaxiality factor -- 9.4.3. Response to triaxial axisymmetric compression loading -- 9.5. On the restraint degree R in situations of restrained shrinkage -- 9.6. Solving a simple structure using the PVP* -- 9.6.1. Problem position -- 9.6.2. Using PVP* (assembling the contributions of the elements): preliminary comments for solving -- Appendix: Prerequisites in Solid Mechanics and Finite Element Methods -- References -- Index -- EULA.
Özet:
Understanding and managing damage and cracking in concrete is essential to ensuring the integrity and durability of civil engineering structures. Both theoretical and practical, this book presents a comprehensive approach to these problems by proposing models and numerical modeling strategies that are treated in a manner that is both simplified and efficient. It proposes a wide variety of applications that are derived from research programs and engineering cases. This book also addresses many situations, such as monotonic or cyclic behavior, seismic responses, a description of fast dynamic situations and effects due to the maturation of concrete at an early age in massive structures. Numerous detailed exercises are provided to help students to understand modeling and calculation techniques. Damage and Cracking of Concrete Structures is indeed intended for students, but also for engineers and researchers in the field of mechanics of materials and structures and, more generally, in civil engineering.
Notlar:
John Wiley and Sons
Yazar Ek Girişi:
Elektronik Erişim:
https://onlinelibrary.wiley.com/doi/book/10.1002/9781394185979Kopya:
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