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E-raamat: Nonlinear Dynamics of Structures Under Extreme Transient Loads [Taylor & Francis e-raamat]

(University of Sarajevo, Bosnia and Herzegovina), (Université Technologie Compiègne, France)
  • Formaat: 242 pages, 34 Tables, black and white; 128 Line drawings, black and white; 43 Halftones, black and white; 171 Illustrations, black and white
  • Ilmumisaeg: 30-May-2019
  • Kirjastus: CRC Press
  • ISBN-13: 9781351052504
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Nonlinear Dynamics of Structures Under Extreme Transient LoadsSuurem pilt
  • Formaat: 242 pages, 34 Tables, black and white; 128 Line drawings, black and white; 43 Halftones, black and white; 171 Illustrations, black and white
  • Ilmumisaeg: 30-May-2019
  • Kirjastus: CRC Press
  • ISBN-13: 9781351052504
Teised raamatud teemal:
Taylor & Francis e-raamatudRohkem infot Taylor & Francis e-raamatute kohta
Raamatu kodulehekülg: https://www.taylorfrancis.com/books/9781351052504

The effect of combined extreme transient loadings on a structure is
not well understood – whether the source is man-made, such as an
explosion and fire, or natural, as an earthquake or extreme wind
loading. A critical assessment of current knowledge is timely (with
Fukushima-like disasters or terrorist threats).

The central issue in all these problems is structural integrity, along
with their transient nature, their unexpectedness, and often the
uncertainty behind their cause. No single traditional scientific
discipline provides full answer, but a number of tools need to be
brought together: nonlinear dynamics, probability theory, some
understanding of the physical nature of the problem, as well as
modeling and computational techniques for representing inelastic
behavior mechanisms.

The book covers model building for different engineering structures
and provides detailed presentations of extreme loading conditions, A
number of illustrations are given: quantifying a plane crash or
explosion induced impact loading, quantifying the effects of strong
earthquake motion, quantifying the impact and long-duration effects of
strong stormy winds - along with a relevant framework for using modern
computational tools. The book considers the levels of reserve in
existing structures, and ways of reducing the negative impact of
high-risk situations by employing sounder design procedures.

Authors ix
1 Initial boundary value problem
1(24)
1.1 Newton's Second Law--Strong Form of Elastodynamics
1(2)
1.2 D'Alembert Principle--Weak Form of Equations of Motion
3(2)
1.3 Hamilton's Principle--Energy Conservation
5(1)
1.4 Modal Superposition Method
6(5)
1.4.1 Rayleigh Damping
8(1)
1.4.2 Nonproportional Damping and Fast Computation Methods
9(2)
1.5 Time-Integration Schemes
11(8)
1.5.1 Central Problem of Dynamics (Time Evolution)
12(1)
1.5.2 Central Difference (Explicit) Scheme
12(3)
1.5.3 Trapezoidal Rule or Average Acceleration (Implicit) Scheme
15(4)
1.6 Motivation for Developments Presented in Part I and Part II
19(1)
1.6.1 Damping Model Characterization
19(1)
1.6.2 Extreme Loading Representation
20(1)
References
20(5)
PART I
2 Steel structures
25(40)
2.1 Essential Ingredients of Plasticity Model
25(6)
2.1.1 ID Plasticity with Hardening and Softening
25(6)
2.2 Localized Failure Plasticity Model
31(3)
2.3 Structural Plasticity Model
34(14)
2.3.1 Simple Form
34(2)
2.3.1.1 Numerical Examples of Small Experiments
36(1)
2.3.2 Multi-Scale Model Parameters Identification
37(3)
2.3.2.1 Beam Element With Embedded Discontinuity
40(8)
2.4 Computation of Beam Plasticity Material Parameters
48(14)
2.4.1 Numerical Examples of Frames and Frame Elements
51(1)
2.4.1.1 Example 1 -- Computation of Beam Plasticity Material Parameters
51(4)
2.4.1.2 Example 2 -- Push-Over of an Asymmetric Frame
55(2)
2.4.1.3 Example 3 -- The Darvall-Mendis Frame
57(1)
2.4.1.4 Example 4 -- Push-Over Analysis of a Symmetric Frame
58(2)
2.4.1.5 Example 5 -- Cyclic Loading of a Steel Structure
60(2)
2.5 Conclusion
62(1)
References
62(3)
3 Reinforced concrete structures
65(46)
3.1 Concrete Modeling with a Damage Model
66(5)
3.1.1 A Numerical Example of Small Experiments
71(1)
3.2 Bond-Slip Model
71(3)
3.3 Steel Model with Classical Elastoplasticity
74(1)
3.4 Reinforced Concrete Model
75(13)
3.4.1 Kinematics of Bond-Slip Along Reinforcement Bar and its X-FEM Representation
76(2)
3.4.2 Solution Procedure for Relative Displacements of Bond-Slip Element
78(3)
3.4.3 Numerical Examples
81(1)
3.4.3.1 Traction Test and Proposed RC Model Validation
81(3)
3.4.3.2 Four-Point Bending Test and Crack-Spacing Computations
84(4)
3.5 Reinforced Concrete Model for Cyclic Loading
88(20)
3.5.1 Constitutive Concrete Model
89(1)
3.5.1.1 Thermodynamics with Internal Variables (TIV)
89(2)
3.5.1.2 Governing Equations of the Constitutive Model
91(4)
3.5.1.3 Euler-Lagrange Equations of a Concrete ID Structure in Dynamic Loading
95(3)
3.5.2 Numerical Examples
98(1)
3.5.2.1 Identification of a Concrete Law
98(4)
3.5.3 Numerical Examples Seismic Application
102(6)
References
108(3)
4 Masonry structures
111(20)
4.1 Computational Modeling of Masonry Structures
112(1)
4.2 Micro-Modeling of Masonry
113(1)
4.3 Strain Localization Phenomena
114(11)
4.3.1 Modeling of In-Plane and Out-Of-Plane Loading on a Brick Wall
115(1)
4.3.1.1 Modeling of Failure Mechanisms in Bricks
115(2)
4.3.1.2 Modeling of Mortar Joints in a Brick Wall
117(5)
4.3.2 Examples
122(1)
4.3.2.1 Example 1
122(2)
4.3.2.2 Example 2
124(1)
4.4 Further Research
125(1)
References
126(5)
PART II
5 Dynamics extreme loads in earthquake engineering
131(14)
5.1 The Free-Field vs. Added Motion Approach in Structure-Foundation Interaction
132(4)
5.2 Localized Nonlinearities in Structure-Foundation Interface
136(2)
5.3 Reduction of Model: Numerical Techniques
138(2)
5.4 Case Studies of Structure-Foundation Interaction Problems
140(5)
Bibliography
143(2)
6 The dynamics of extreme impact loads in an airplane crash
145(20)
6.1 Central Difference Scheme Computation of Impact Problems
147(4)
6.2 Local Model Extensions
151(1)
6.3 Field Transfer Strategy for Complex Structure Impact Loading
152(2)
6.4 Field Transfer in Space and Projection to Coarse Mesh
154(3)
6.5 Field Transfer in Time and Minimization Problem for Optimal Transfer Procedure
157(2)
6.6 Numerical Examples
159(4)
6.6.1 Example 1--Element Level
159(2)
6.6.2 Example 2 -- Structure Level
161(2)
References
163(2)
7 Fire-induced extreme loads
165(50)
7.1 Transient Heat Transfer Computations
166(1)
7.2 Damage Mechanisms Representation Under Increased Temperature
167(3)
7.3 Coupled Thermomechanical Problem Computations
170(1)
7.4 Operator Split Solution Procedure with Variable Time Steps
171(1)
7.5 Numerical Examples
172(7)
7.5.1 Example 1 -- Circular Ring Heating
172(2)
7.5.2 Example 2 -- Cellular Structures
174(1)
7.5.3 Example 3 -- Hollow Brick Wall
175(4)
7.6 Detailed Theoretical Formulation of Localized Thermomechanical Coupling Problem
179(8)
7.6.1 Continuum Thermo-Plastic Model and its Balance Equation
180(3)
7.6.2 Thermodynamics Model for Localized Failure and Modified Balance Equation
183(1)
7.6.2.1 Thermodynamics Model
183(3)
7.6.2.2 Mechanical Balance Equation
186(1)
7.6.2.3 Local Balance of Energy at the Localized Failure Point
186(1)
7.7 Embedded Discontinuity Finite Element Method (ED-FEM) Implementation
187(8)
7.7.1 Domain Definition
187(1)
7.7.2 "Adiabatic" Operator Split Solution Procedure
187(1)
7.7.3 ED-FEM Implementation for the Mechanical Part
188(4)
7.7.4 ED-FEM Implementation for the Thermal Part
192(3)
7.8 Numerical Examples
195(17)
7.8.1 Example 1 -- Simple Tension Imposed Temperature Example with a Fixed Mesh
195(1)
7.8.1.1 Material Properties Independent on Temperature
195(2)
7.8.1.2 Material Properties are L inearly Dependent on Temperature
197(3)
7.8.1.3 Material Properties Non-Linearly Dependent on Temperature (Eurocode 1993-1-2)
200(6)
7.8.2 Model Generalization to a 2D/3D Case: Formulation, Implementation and Numerical Results
206(1)
7.8.2.1 Theoretical Formulation
206(6)
References
212(3)
8 Fluid-induced extreme loads
215(19)
8.1 Structure and Fluid Formulations
215(6)
8.1.1 Structure Equation of Motion
215(3)
8.1.2 Free-Surface Flow
218(3)
8.2 Fluid-Structure Interaction Problem Computations
221(3)
8.2.1 Theoretical Formulation Of Fluid-Structure Interaction Problem
221(3)
8.3 Numerical Examples
224(10)
8.3.1 Example 1a -- Flexible Appendix in a Flow
224(4)
8.3.2 Example 1b -- Flexible Appendix in a Flow--3d
228(1)
8.3.3 Example 2 -- Three-Dimensional Sloshing Wave Impacting a Flexible Structure
229(5)
References 234(5)
Index 239
Adnan Ibrahimbegovic is a Professor at the Université Technologie Compiègne in France. He conducts interdisciplinary research within the Sorbonne Universités group, and holds a Research Chair with the Institut Universitaire de France, and was formerly head of teaching and research in the civil engineering Civil Engineering Department at the École Normale Supérieure Cachan. He is a Fellow of the International Association for Computational Mechanics.

Naida Ademovi is an Associate Professor in Civil (Structural) Engineering, Faculty of Civil Engineering at the University of Sarajevo in Bosnia and Herzegovina, which she joined in 2001. She is also an Associate Professor at the Center of Interdisciplinary Studies, University of Sarajevo, on the new Masters program "Natural Disasters Risk Management in Western Balkan Countries".

Naida received her 5-year Diploma (Bachelor of Science) in Structural Engineering from the University of Sarajevo. She received a Master of Science in "Computational Engineering" from Rühr University in Bochum, Germany, in 2004, and a second Masters degree ("Advanced Masters in Structural Analysis of Monuments and Historical Constructions-SAHC") from the University of Minho, Portugal and University of Padova, Italy, in 2011. The SAHC program she was involved in won an European Union Prize for Cultural Heritage Award/Europa Nostra Award in 2017.

Naida received her PhD in 2012 in the field of earthquake engineering and masonry structures at the University of Sarajevo. She has co-authored two books and published over 70 peer-reviewed papers in reputed international journals.
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