Computational Methods for Reinforced Concrete Structures 2nd Edition by Ulrich Häußler Combe ISBN 3433033102 9783433033104

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Product details:

ISBN 10: 3433033102

ISBN 13: 978-3433033104

Author:  Ulrich Häußler-Combe 

Computational Methods for Reinforced Concrete Structures 2nd Edition : Concrete is by far the most used building material due to its advantages: it is shapeable, cost-effective and available everywhere. Combined with reinforcement it provides an immense bandwidth of properties and may be customized for a huge range of purposes. Thus, concrete is the building material of the 20th century. To be the building material of the 21th century its sustainability has to move into focus. Reinforced concrete structures have to be designed expending less material whereby their load carrying potential has to be fully utilized.
Computational methods such as Finite Element Method (FEM) provide essential tools to reach the goal. In combination with experimental validation, they enable a deeper understanding of load carrying mechanisms. A more realistic estimation of ultimate and serviceability limit states can be reached compared to traditional approaches. This allows for a significantly improved utilization of construction materials and a broader horizon for innovative structural designs opens up.
However, sophisticated computational methods are usually provided as black boxes. Data is fed in, the output is accepted as it is, but an understanding of the steps in between is often rudimentary. This has the risk of misinterpretations, not to say invalid results compared to initial problem definitions. The risk is in particular high for nonlinear problems. As a composite material, reinforced concrete exhibits nonlinear behaviour in its limit states, caused by interaction of concrete and reinforcement via bond and the nonlinear properties of the components. Its cracking is a regular behaviour. The book aims to make the mechanisms of reinforced concrete transparent from the perspective of numerical methods. In this way, black boxes should also become transparent.
Appropriate methods are described for beams, plates, slabs and shells regarding quasi-statics and dynamics. Concrete creeping, temperature effects, prestressing, large displacements are treated as examples. State of the art concrete material models are presented. Both the opportunities and the pitfalls of numerical methods are shown. Theory is illustrated by a variety of examples. Most of them are performed with the ConFem software package implemented in Python and available under open-source conditions.

 

Computational Methods for Reinforced Concrete Structures 2nd Edition Table of contents:

1 FINITE ELEMENTS OVERVIEW
Modeling Basics
Discretization Outline
Elements
Material Behavior
Weak Equilibrium and Spatial Discretization
Numerical Integration and Solution Methods for Algebraic Systems
Convergence

2 UNIAXIAL STRUCTURAL CONCRETE BEHAVIOR
Scales and Short-Term Stress-Strain Behavior of Homogenized Concrete
Long-Term Behavior –
Creep and Imposed Strains
Reinforcing Steel Stress-Strain Behavior
Bond between Concrete and Reinforcing Steel
The Smeared Crack Model
The Reinforced Tension Bar
Tension Stiffening of Reinforced Tension Bar

3 STRUCTURAL BEAMS AND FRAMES
Cross-Sectional Behavior
1 Kinematics –
2 Linear Elastic Behavior –
3 Cracked Reinforced Concrete Behavior –
4 Compressive Zone and Internal Forces –
5 Linear Concrete Compressive Behavior with Reinforcement –
6 Nonlinear Behavior of Concrete and Reinforcement
Equilibrium of Beams
Finite Element Types for Plane Beams
1 Basics –
2 Finite Elements for the Bernoulli Beam –
3 Finite Elements for the Timoshenko Beam –
4 System Building and Solution Methods –
5 Elementwise Integration –
6 Transformation and Assemblage –
7 Kinematic Boundary Conditions and Solution
Further Aspects of Reinforced Concrete
1 Creep –
2 Temperature and Shrinkage –
3 Tension Stiffening –
4 Shear Stiffness for Reinforced Cracked Concrete Sections
Prestressing
Large Deformations and Second-Order Analysis
Dynamics of Beams

4 STRUT-AND-TIE MODELS
Elastic Plate Solutions
Modeling
Solution Methods for Trusses
Rigid-Plastic Truss Models
More Application Aspects

5 MULTIAXIAL CONCRETE MATERIAL BEHAVIOR
Basics
1 Continua and Scales –
2 Characteristics of Concrete Behavior
Continuum Mechanics
1 Displacements and Strains –
2 Stresses and Material Laws –
3 Coordinate Transformations and Principal States
Isotropy, Linearity, and Orthotropy
1 Isotropy and Linear Elasticity –
2 Orthotropy –
3 Plane Stress and Strain
Nonlinear Material Behavior
1 Tangential Stiffness –
2 Principal Stress Space and Isotropic Strength –
3 Strength of Concrete –
4 Phenomenological Approach for the Biaxial Anisotropic Stress-Strain Behavior
Isotropic Plasticity
1 A Framework for Multiaxial Elastoplasticity –
2 Pressure-Dependent Yield Functions
Isotropic Damage
Multiaxial Crack Modeling
1 Basic Concepts of Crack Modeling –
2 Multiaxial Smeared Crack Model
The Microplane Model
Localization and Regularization
1 Mesh Dependency –
2 Regularization –
3 Gradient Damage
General Requirements for Material Laws

6 PLATES
Lower Bound Limit Analysis
1 The General Approach –
2 Reinforced Concrete Contributions –
3 A Design Approach
Crack Modeling
Linear Stress-Strain Relations with Cracking
2D Modeling of Reinforcement and Bond
Embedded Reinforcement

7 SLABS
A Placement
Cross-Sectional Behavior
1 Kinematic and Kinetic Basics –
2 Linear Elastic Behavior –
3 Reinforced Cracked Sections
Equilibrium of Slabs
1 Strong Equilibrium –
2 Weak Equilibrium –
3 Decoupling
Structural Slab Elements
1 Area Coordinates –
2 A Triangular Kirchhoff Slab Element
System Building and Solution Methods
Lower Bound Limit Analysis
1 General Approach and Principal Moments –
2 Design Approach for Bending –
3 Design
Approach for Shear
Kirchhof Slabs with Nonlinear Material Behavior

8 SHELLS
Approximation of Geometry and Displacements
Approximation of Deformations
Shell Stresses and Material Laws
System Building
Slabs and Beams as a Special Case
Locking
Reinforced Concrete Shells
1 The Layer Model –
2 Slabs as Special Case –
3 The Plastic Approach

9 RANDOMNESS AND RELIABILITY
Basics of Uncertainty and Randomness
Failure Probability
Design and Safety Factors

 

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