Course detail

Selected Chapters of Concrete Structures 1 (KON)

FAST-CL053Acad. year: 2018/2019

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.

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 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. Knowledge of design of concrete structures for fatigue.

Prerequisites

structural mechanics, numerical methods, concrete structures, prestressed concrete

Co-requisites

do not required

Recommended optional programme components

Not applicable.

Recommended or required reading

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations. Education runs in the forms of lectures and trainings. Character of the lectures is based on definition of basic principles, problems and methodology. In the trainings the main subject matters are trained on individually defined projects (examples).

Assesment methods and criteria linked to learning outcomes

To gain the credit, the students should elaborate individually defined design and calculate specified task. The students are obliged to consult the design continuously in the given terms and submit it to the fixed date. The presences in training lessons are checked. An exam consists both of the written part, in which the task is elaborated, and the theoretical part. To pass the exam successfully, both parts should be accomplished.

Language of instruction

Czech

Work placements

Not applicable.

Course curriculum

1. 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. Hybrid structures. Influence of rheology of concrete on structural behaviour. Principal of rheological phenomena.
5. 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. Temperature effects on concrete - calculation of temperature stress acting on the structure.
11. Experimental structural analysis, model similarity. The interrelation of design and structural model.
12.- 13. Design of concrete structures for fatigue.

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.

Classification of course in study plans

  • Programme N-K-C-SI (N) Master's

    branch S , 1. year of study, summer semester, 5 credits, compulsory-optional

  • Programme N-P-E-SI (N) Master's

    branch S , 1. year of study, summer semester, 5 credits, compulsory-optional

  • Programme N-P-C-SI (N) Master's

    branch S , 1. year of study, summer semester, 5 credits, compulsory-optional
    branch K , 1. year of study, summer semester, 5 credits, compulsory-optional

  • Programme N-K-C-SI (N) Master's

    branch K , 1. year of study, summer semester, 5 credits, compulsory-optional

  • Programme N-P-E-SI (N) Master's

    branch K , 1. year of study, summer semester, 5 credits, compulsory-optional

Type of course unit

 

Lecture

26 hours, optionally

Teacher / Lecturer

Syllabus

1. 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. Hybrid structures. Influence of rheology of concrete on structural behaviour. Principal of rheological phenomena.
5. 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. Temperature effects on concrete - calculation of temperature stress acting on the structure.
11. Experimental structural analysis, model similarity. The interrelation of design and structural model.
12.- 13. Design of concrete structures for fatigue.

Exercise

26 hours, compulsory

Teacher / Lecturer

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.