Understanding the Tensile Properties of Concrete : In Statics and Dynamics / edited by Jaap Weerheijm.

Format:

Book

Contributor:

Weerheijm, Jaap, editor.

Series:

Woodhead Publishing series in civil and structural engineering.

Woodhead Publishing Series in Civil and Structural Engineering Series

Language:

English

Subjects (All):

Concrete construction.

Concrete construction--Deterioration--Prevention.

Concrete construction--Testing.

Physical Description:

1 online resource (452 pages)

Edition:

Second edition.

Place of Publication:

Cambridge, MA : Woodhead Publishing, [2024]

Summary:

The book 'Understanding the Tensile Properties of Concrete' delves into the intricate details of concrete's behavior under both static and dynamic tensile loads. Edited by Jaap Weerheijm, it is part of the Woodhead Publishing Series in Civil and Structural Engineering. The volume explores the composition, mechanical properties, and response mechanisms of concrete, emphasizing its weaker performance in tension compared to compression. Topics covered include factors affecting tensile properties, dynamic response regimes, and modeling methods such as the Discrete Element Method (DEM). The book is intended for researchers and professionals in civil engineering and materials science, aiming to enhance the understanding and application of concrete in structural contexts. It also discusses the latest computational techniques and experimental methods for assessing concrete's tensile properties. Generated by AI.

Contents:

Intro

Understanding the Tensile Properties of Concrete: In Statics and Dynamics

Copyright

Contents

Contributors

Preface

Chapter 1: Introduction to concrete: A resilient material system

1.1. Introduction

1.2. Microscale

cement matrix

1.3. The mesoscale, bond cement matrix, and aggregates

1.4. The dominant scale

References

Part One: Concrete in static tensile loading

Chapter 2: Factors affecting the tensile properties of concrete

2.1. Introduction

2.2. Effect of composition

2.2.1. Low- to high-strength concrete

2.2.2. Type of aggregate

2.2.3. Aggregate size

2.3. Effect of curing and moisture

2.4. Effect of temperature

2.4.1. High temperature

2.4.2. Low temperature

2.5. Influence of specimen size

2.6. Effect of age

2.7. Effect of load duration

2.8. Effect of cyclic loading

2.9. Influence of type of loading on load-displacement diagram on macroscale

2.9.1. Load-controlled tests

2.9.2. Displacement controlled

2.10. Crack development on the mesoscale

2.10.1. Distributed cracking

2.10.2. Discrete cracking

2.11. Relation between tensile strength and compressive strength

2.12. The practical implications of laboratory tests

2.13. Fibre-reinforced concrete

2.13.1. Scope

2.13.2. Classification of fibre-reinforced concrete

2.13.3. Useful applications of fibre-reinforced concrete

Chapter 3: DEM modelling of concrete fracture based on its structure micro-CT images

3.1. Introduction

3.2. Concrete experiments

3.3. Discrete element method for concrete

3.4. DEM input data

3.4.1. Specimen construction

3.4.2. Model calibration

3.5. 3D DEM results

3.5.1. Force-displacement curve and macrocrack location

3.5.2. Grain rotations, strain localization and broken contacts

3.5.3. Particle contact forces.

3.5.4. Energies

3.6. 3D parametric study

3.6.1. Effect of mortar microporosity

3.6.2. Effect of strength and number of ITZs

3.6.3. Effect of aggregate shape

3.6.3.1. Strength and brittleness

3.6.3.2. Cracking

3.6.3.3. Broken contacts

3.7. 2D parametric study

3.7.1. Effect of ITZ microporosity and width

3.8. Conclusions

Acknowledgements

Chapter 4: Modelling the response of concrete to moisture

4.1. Introduction - The close connection between moisture and durability

4.2. Modelling moisture transport in intact concrete

4.2.1. A century of research on transport modelling

4.2.2. State-of-the-art modelling of unsaturated moisture transport

4.2.3. Moisture retention

4.2.4. Moisture transport

4.2.4.1. Diffusivity approach

4.2.4.2. Determining the liquid and vapour permeability

Determination of the liquid permeability

Determination of the vapour permeability

4.2.4.3. Network approach

4.3. Modelling moisture transport in degraded concrete

4.3.1. Dual porosity models

4.3.2. Dual permeability models

4.3.3. Discrete fracture models

4.4. Interaction between moisture transport and material behaviour

4.4.1. The impact of moisture on mechanical material behaviour

4.4.2. The impact of material degradation on moisture transport

4.5. 4D experimental tools for model development and validation

4.5.1. Need for 4D tools

4.5.2. Introduction to x-ray imaging

4.5.3. Obtaining morphological data and moisture profiles

4.6. Summary and future trends

Part Two: Concrete in dynamic tensile loading

Chapter 5: Dynamic response regimes of concrete structures

5.1. Introduction

5.2. Earthquake loading and impact deflection: Inertia effects

5.3. Blast response: Rate-dependent strength.

5.4. Projectile impact loading: Compressibility and high triaxial stresses

5.5. Contact detonations and explosive formed projectiles (EFPs): Shock and release properties

5.6. Concluding remarks

Chapter 6: Dynamic testing devices

6.1. Introduction: Different set of experimental methods to characterize the tensile response of concrete

6.2. Tensile strength and fracture energy of concrete at intermediate loading rates (σ100GPa/s or 2/s)

6.2.1. Introduction: Experimental techniques used at intermediate loading rates

6.2.2. Direct tensile tests performed through a high-speed hydraulic press

6.2.3. Gravity-driven SHB facility at Delft

6.2.4. SHB facility at ISPRA

6.3. Characterizing the tensile strength and fracture energy of concrete at high loading rates (100GPa/sσ1000GPa/s or 20/ ...

6.3.1. Introduction: Benefits and disadvantages of spalling tests

6.3.2. Test device and methodology used at the Ernst Mach Institute

6.3.3. Experimental technique developed in Lorraine (LEM3 Lab.) and Grenoble Alpes Universities (3SR Lab.)

6.3.4. Image-based inertial impact (IBII) testing technique applied to spalling tests

6.3.5. Dynamic fracture energy in concretes by spalling, the test methodologies at Delft and Ernst Mach Institute

6.3.6. Dynamic fracture energy in concrete by Image-Based Inertial Impact, a testing methodology from Université Grenoble ...

6.4. Tensile strength of concrete at very high loading rates (σ105GPa/s or 2000/s)

6.4.1. Advantages and drawbacks of planar plate impact technique

6.4.2. Spalling test based on pulsed-power technology

6.4.3. Spalling test based on wavy-machined plate impact test

6.5. Edge-on impact tests performed on concretes

6.6. Concluding remarks

Chapter 7: Response mechanisms of concrete under impulsive tensile loading.

7.1. Introduction: Concrete response mechanisms under impulsive tensile loading

7.2. The effect of cracking rates on the tensile strength of concrete

7.2.1. Mechanical response

7.2.2. Transition from moderate to enhanced rate effect on strength

7.2.3. Mechanical response in the high loading rate regime (σ50GPa/s)

7.3. Multiple fragmentation due to the limited cracking velocity

7.3.1. Introduction

7.3.2. The Denoual-Forquin-Hild (DFH) model

7.3.3. Analytical solution and model predictions

7.3.4. Identification of material parameters used in DFH model

7.3.4.1. The parameter m

7.3.4.2. Identification of the density of critical defects based on X-ray tomography CT scan

7.3.4.3. The parameter Vcrack, the crack velocity in concretes

7.3.5. Comparison of the DFH model predictions with experimental data

7.4. The effect of moisture content on the dynamic strength

7.5. Strength data and empirical models

7.6. The postpeak fracture process in moderate and high loading rate regimes

7.6.1. Definition of fracture energy parameters

7.6.2. Dynamic conditions

7.6.3. Experimental data on the dynamic fracture process and fracture energy

7.7. Concluding remarks

Chapter 8: Performance of high-strength fibre-reinforced concrete in dynamics

8.1. Introduction

8.2. HSFRC development and composition

8.2.1. Historical overview developments

8.2.2. Composition

8.3. HSFRC in statics

8.3.1. Strength parameters in compression and tension

8.3.2. The fracture energy

8.4. Response mechanisms in dynamics

8.4.1. Dynamic tensile strength

8.4.2. Dynamic fracture energy

8.4.2.1. Theoretical considerations

8.4.2.2. Test campaigns

8.5. Influence of fibre and fibre orientation on the dynamic tensile and impact behaviour of HSFRC

8.5.1. Introduction: Goal and methodology.

8.5.2. Influence of fibre content and orientation according to spalling experiments with single Hopkinson bar

8.5.3. Modelling of HSFRC tensile behaviour based on mesoscale damage model

8.5.4. Influence of fibre content according to EOI experiments

8.5.5. Influence of fibre orientation according to cratering by EOI experiments

8.6. Concluding remarks

Chapter 9: Modelling of dynamic response of concrete with mesoscopic heterogeneity

9.1. Introduction

9.2. Overview of mesoscopic structure of concrete and computational considerations

9.3. Typical mesoscale modelling schemes and applications in dynamic analysis of concrete

9.3.1. Lattice models

9.3.2. Discrete element and discrete particle methods

9.3.3. Mesoscale models in a finite element framework

9.3.4. Applications of mesoscale models in high strain rate analysis of concrete

9.4. Development of a mesoscale finite element framework for dynamic analysis of concrete

9.4.1. A mesoscale FE model with equivalent ITZ

9.4.1.1. Generation of coarse aggregates

9.4.1.2. Generation of FE mesh

9.4.1.3. Material models and other numerical considerations

9.4.1.4. Validation of the model and influences of nonhomogeneity in mortar and aggregates on the bulk concrete behaviour

9.4.2. A mesoscale FE model with a cohesive plus contact-friction (C-CF) interface scheme for ITZ

9.4.2.1. Model overview

9.4.2.2. Further modelling examples using the mesoscale model with C-CF interface for the ITZ

9.4.3. A mesoscale FE model with full representation of fracture discontinuity using the C-CF interface scheme

9.5. Mesoscale analysis of dynamic tension of concrete with a rate-dependent cohesive model

9.5.1. Rate-dependent cohesive model

9.5.2. Concrete under direct tension

9.5.2.1. General dynamic tension behaviour.

9.5.2.2. Direct contribution of material heterogeneity.

Notes:

Includes bibliographical references and index.

Description based on publisher supplied metadata and other sources.

Description based on print version record.

Part of the metadata in this record was created by AI, based on the text of the resource.

ISBN:

0-443-15594-1