Course detail

Prestressed Engineering Construction

FAST-CL002Acad. year: 2018/2019

Principle of prestressing. Basic concept of pre-tensioning and post-tensioning. Material properties, manufacturing. Pretensioning operations, technology. Post-tensioning operations, technology, prestressing systems. Prestressing and its changes. Effects of prestressing on concrete members and structures, statically determinate and indeterminate structures. Ultimate limit state, full stress-strain response, shear resistance. Resistance of against cracks. Control of crack width and deflection of prestressed members. Design and construction both of building and engineering prestressed structures. Application of prestressing on masonry structures. Strengthening of masonry structures using prestressing. Design and construction of general types of bridges.

Department

Institute of Concrete and Masonry Structures (BZK)

Learning outcomes of the course unit

Understanding of the behavior of prestressed concrete structures. Knowledge of pre-tensioning technology and post-tensioning technology. Design and construction of prestressed concrete structural members and structural systems, analysis and detailing. Strengthening of masonry structures by prestressing. Knowledge of core of designing and realization of fundamental types of concrete bridges.

Prerequisites

structural mechanics, theory of elasticity, plasticity, concrete and masonry members, concrete and masonry structures

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, a student should elaborate individually defined design on a subject matter and tasks. The students are obliged to consult the design continuously in the given terms and submit it to the determined date. An exam consists both of the written part, in which specified 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. Introduction, basic concept of prestressing. Behaviour of non-prestressed and prestressed concrete beams. Material properties, manufacturing.
2. Prestressing technology, basic terminology. Pre- and post-tensioning prestressed concrete, prestressing systems.
3.- 4. Prestressing and its changes. Effects of prestressing on concrete members and structures. Equivalent load method. Design of prestressing using the load balancing method. Influence of the construction metod on design of prestressed structures.
5. General principles of prestress members dimensioning. Ultimate limit state (ULS) of prestressed members loaded by axial force and bending moment, decompression state, initial stress-state of the cross-section. Prestressed members loaded in shear and torsion, stress analysis, proportioning.
6. Analysis of the anchorage zone - stress, calculation model, check of resistance, reinforcement. Serviceability limit states (SLS). Limitation of stress, crack resistence, calculation of crack width. Control of deflection.
7. - 8. Design and realisation of selected prestressed structures of building and engineering constructions.
9. Application of prestressing on masonry structures – structural modifications, principles of structural solution and dimensioning.
10. Strengthening of masonry structures by prestressing – methods of strengthening, realisation, structural analysis.
11. Design and construction of general types of slabs and girder bridges.
12. Problems of design and construction of bridges built on the stationary and launch scaffolding, cantilever bridges, incrementally launched bridges.
13. Problems of design and construction of precast girder and segmental bridges.

Aims

Understanding of the behaviour of prestressed concrete structures.
Design and construction of prestressed concrete structural members and structural systems, analysis and detailing.

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-P-E-SI (N) Master's

    branch R , 1. year of study, winter semester, 3 credits, compulsory

  • Programme N-K-C-SI (N) Master's

    branch R , 1. year of study, winter semester, 3 credits, compulsory

  • Programme N-P-C-SI (N) Master's

    branch R , 1. year of study, winter semester, 3 credits, compulsory

Type of course unit

 

Lecture

26 hours, optionally

Teacher / Lecturer

Syllabus

1. Introduction, basic concept of prestressing. Behaviour of non-prestressed and prestressed concrete beams. Material properties, manufacturing.
2. Prestressing technology, basic terminology. Pre- and post-tensioning prestressed concrete, prestressing systems.
3.- 4. Prestressing and its changes. Effects of prestressing on concrete members and structures. Equivalent load method. Design of prestressing using the load balancing method. Influence of the construction metod on design of prestressed structures.
5. General principles of prestress members dimensioning. Ultimate limit state (ULS) of prestressed members loaded by axial force and bending moment, decompression state, initial stress-state of the cross-section. Prestressed members loaded in shear and torsion, stress analysis, proportioning.
6. Analysis of the anchorage zone - stress, calculation model, check of resistance, reinforcement. Serviceability limit states (SLS). Limitation of stress, crack resistence, calculation of crack width. Control of deflection.
7. - 8. Design and realisation of selected prestressed structures of building and engineering constructions.
9. Application of prestressing on masonry structures – structural modifications, principles of structural solution and dimensioning.
10. Strengthening of masonry structures by prestressing – methods of strengthening, realisation, structural analysis.
11. Design and construction of general types of slabs and girder bridges.
12. Problems of design and construction of bridges built on the stationary and launch scaffolding, cantilever bridges, incrementally launched bridges.
13. Problems of design and construction of precast girder and segmental bridges.

Exercise

13 hours, compulsory

Teacher / Lecturer

Syllabus

1. Effect of prestressing on statically determinate structures. Students are to solved tasks individually.
2. Effect of prestressing on statically indeterminate structures. Students are to solved tasks individually.
3.- 4. Project: Design and assessment of prestressed roof girder. Action and combination of loads, design of cross-section, characteristics of materials, types of prestressing steels, structural requirements.
5.– 6. Continuation of project. Design of eccentricity and magnitude of prestressing force, design of amount of prestressed strands.
7. Continuation of project. Immediate (short-term) losses of prestress.
8. Continuation of project. Long-term (time dependent) losses of prestress.
9.– 10. Continuation of project. Verification of design by serviceability limit state – stress limitation, crack control.
11. Continuation of project. Verification of design by ultimate limit state – bending moment.
12. Continuation of project. Scheme of girder reinforcement by prestressing strands.
13. Project and tasks submission. Credit.