Course detail

Selected Chapters of Concrete Structures 1 (K)

FAST-NLB031Acad. year: 2022/2023

Static analysis, plasticity method, lower-bound theorem, upper-bound theorem. Truss analogy, material properties, application for reinforcement design of structures and details. Analysis of beams loaded in shear, variable angle truss model, interaction of internal forces. Compression field theory. Physical principles of creep, shrinkage and ageing of concrete drying up of concrete, solution of state of stress from temperature load, principles of linearity and superposition. Creep models – assumptions, mathematical functions, properties. Integral and differential equations, affinity of creep, stress history. Non-homogeneity of structures. Force method for creep analysis. Structural analysis of step-by-step constructed structures. The influence of prestressing, step-by-step construction, and rheological effects on structures. Simplified and numerical methods for creep analysis and their combination by FEM. Design of concrete structures for fatigue. Waterproof foundation structures - concept, analysis, design, realization, rehabilitation. Designing of concrete structures reinforced with FRP reinforcement.

Language of instruction

Czech

Number of ECTS credits

4

Mode of study

Not applicable.

Guarantor

doc. Ing. Jaroslav Navrátil, CSc.

Department

Institute of Concrete and Masonry Structures (BZK)

Learning outcomes of the course unit

A student gains these knowledge and skills:
• Understanding of the principles of concrete plasticity and its application in concrete structures design.
• Knowledge of the modern methods of design of the members stressed by shear and torsion, optionally in interaction with others types of internal forces.
• Understanding of the principles of rheological effects of concrete and mastering the methods for analysis of these effects on constructions.
• Understanding of the methods for analysis of long-term effects of concrete and composite structures in view of the rheological properties of concrete.

Prerequisites

structural mechanics, numerical methods, concrete structures, prestressed concrete

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Not applicable.

Assesment methods and criteria linked to learning outcomes

Not applicable.

Course curriculum

1. The relationship of the construction design and computational model. Static analysis, plasticity method. Strut and tie model. Proportioning of nodes, struts and ties.
2. Deep wall beam. Reinforcement design of brackets, corbels and discontinuity zones.
3. Variable angle truss model, interaction of internal forces acting on concrete cross-section.
4. Design of concrete structures to fatigue - the concept and methods for the assessment of concrete and reinforcement.
5. Hybrid structures. Influence of rheology of concrete on structural behaviour. Principal of rheological phenomena. Effects of creep and shrinkage, non-homogeneity of structures. Colonnetti’s theorems. Components of concrete strain.
6. Delayed strain. Principle of linearity (stress, temperature) and superposition, stress history, ageing of concrete.
7. Simplified and numerical methods for the analysis of rheological effects on structures – effective modulus methods, effective time method.
8. Time discretization method, its combination with finite element method.
9. Structural analysis of progressively constructed prestressed structures, force method, influence of shrinkage and creep.
10. Experimental structural analysis, model similarity. Temperature effects on concrete – calculation of temperature stress acting on the structure.
11. Introduction to the problems of waterproof foundation structures designing, conceptual design. Static loads, loads from volumetric changes, other loads including the effect of sedimentation of the object (interaction with the subsoil). Design of waterproof concrete structures.
12. Design of waterproof concrete structures. Calculation and dimensioning. Sealing of joints and penetrations. Implementation principles, examples of implementation. Rehabilitation of defects and failures of waterproof concrete structures (especially crack injection).
13. Use of FRP reinforcement in concrete structures. Manufacturing, material characteristics. Short-term and long-term behavior of FRP reinforcements. Designing of concrete structures reinforced with FRP reinforcement.

Work placements

Not applicable.

Aims

Understanding of the principle of concrete plasticity and its application in design of concrete structures.
To provide the students with the modern methods of design of the members loaded in shear and torsion, optionally in interaction with other components of internal forces.
Understanding of the principles of rheological effects of concrete and mastering the methods for analysis of these effects on structures.
Understanding of the methods for analysis of long-term effects of concrete and composite structures in view of the rheological properties of concrete.

Specification of controlled education, way of implementation and compensation for absences

Extent and forms are specified by guarantor’s regulation updated for every academic year.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

NAVRÁTIL, Jaroslav. Předpjaté betonové konstrukce. Brno: CERM, 2008. ISBN 978-80-7204-561-7 (CS)
NAVRÁTIL, Jaroslav. Vybrané statě z betonových konstrukcí I. Modul M01 (studijní opora v elektronické podobě). Brno: VUT, 2007. (CS)
ŠMERDA, Zdeněk a Vladimír KŘÍSTEK. Dotvarování a smršťování betonových prvků a konstrukcí. Praha: SNTL, 1978. (CS)

Recommended reading

BAŽANT, Zdeněk P. and Robert L´HERMITE. Mathematical Modelling of Creep and Shrinkage of Concrete. New York: John Wiley and Sons, 1988. ISBN 0471920576 (EN)
GHALI, Amin, Renaud FAVRE and Mamdouh ELBADRY. Concrete Structures. Stresses and Deformations: Analysis and Design for Sustainabil. London: Spon Press, 2012. ISBN 978-0-415-58561-3 (EN)
HSU, Tomas. T. C. and Y. L. MO. Unified Theory of Concrete Structures. Chichester, UK: John Wiley & Sons, 2010. ISBN 978-0-470-68874-8 (EN)
KOHOUTKOVÁ, Alena, Jaroslav PROCHÁZKA a Jiří ŠMEJKAL. Modelování a vyztužování betonových prvků. Lokální modely železobetonových konstrukcí. Praha: ČVUT, 2013. ISBN 978-80-01-05329-4 (CS)

Classification of course in study plans

  • Programme NPC-SIK Master's 1 year of study, summer semester, compulsory-optional

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

doc. Ing. Jaroslav Navrátil, CSc.
doc. Ing. Radim Nečas, Ph.D.

Syllabus

1. The relationship of the construction design and computational model. Static analysis, plasticity method. Strut and tie model. Proportioning of nodes, struts and ties. 2. Deep wall beam. Reinforcement design of brackets, corbels and discontinuity zones. 3. Variable angle truss model, interaction of internal forces acting on concrete cross-section. 4. Design of concrete structures to fatigue - the concept and methods for the assessment of concrete and reinforcement. 5. Hybrid structures. Influence of rheology of concrete on structural behaviour. Principal of rheological phenomena. Effects of creep and shrinkage, non-homogeneity of structures. Colonnetti’s theorems. Components of concrete strain. 6. Delayed strain. Principle of linearity (stress, temperature) and superposition, stress history, ageing of concrete. 7. Simplified and numerical methods for the analysis of rheological effects on structures – effective modulus methods, effective time method. 8. Time discretization method, its combination with finite element method. 9. Structural analysis of progressively constructed prestressed structures, force method, influence of shrinkage and creep. 10. Experimental structural analysis, model similarity. Temperature effects on concrete – calculation of temperature stress acting on the structure. 11. Introduction to the problems of waterproof foundation structures designing, conceptual design. Static loads, loads from volumetric changes, other loads including the effect of sedimentation of the object (interaction with the subsoil). Design of waterproof concrete structures. 12. Design of waterproof concrete structures. Calculation and dimensioning. Sealing of joints and penetrations. Implementation principles, examples of implementation. Rehabilitation of defects and failures of waterproof concrete structures (especially crack injection). 13. Use of FRP reinforcement in concrete structures. Manufacturing, material characteristics. Short-term and long-term behavior of FRP reinforcements. Designing of concrete structures reinforced with FRP reinforcement.

Exercise

26 hod., compulsory

Teacher / Lecturer

doc. Ing. Jaroslav Navrátil, CSc.
doc. Ing. Radim Nečas, Ph.D.

Syllabus

1. Deep wall beam – solving by truss analogy method. 2. Short bracket (corbel) – solving by truss analogy method. 3.–4. Calculating of the effects of creep on concrete structures – principle of superposition. 5.–6. Assessment of the limit of normal stresses from the operating effects of prestressing on the bridge structure – the use of force method for creep calculation. 7. Correction. 8.–9. Calculation of stress in the concrete sections of composite columns by time discretization analysis (basic method TDA). 10. Correction. 11. Possibility of modelling of the creep effect on concrete structures – practical exercises. 12. Final correction. 13. Design submission. Credit.