Course Details
Prestressed Engineering Construction
Academic Year 2024/25
NLA031 course is part of 1 study plan
NPC-SIR Winter Semester 1st year
Course Guarantor
Institute
Language of instruction
Czech
Credits
3 credits
Semester
winter
Forms and criteria of assessment
course-unit credit and examination
Offered to foreign students
Not to offer
Course on BUT site
Lecture
13 weeks, 2 hours/week, elective
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 weeks, 1 hours/week, compulsory
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.