Stability and modelling of steel structures

Garant předmětu:

Michal Jandera, Josef Macháček

Lecturer:

Michal Jandera, Josef Macháček

Tutor:

Michal Jandera, Josef Macháček

Supervisor:

Department of Steel and Timber Structures

Synopsis:

Subject YSMK covers two parts. The first one deals with stability and strength of steel plates, the second one with stability and strengths of steel frame structures.

In the first part the historic collapses of steel structures are analysed including the importance of imperfections for a design of thin plated structures. Presented are principles of theory of buckling, linear and nonlinear theory of buckling of thin plates. The results are applied to the 4th class cross sections in harmony with Eurocode. Buckling due to normal, shear and local loadings including their combination is analysed in a detail. In the end the application of the results is shown together with design of necessary stiffeners.

The second part is focused on member and structure stability. Possible global analysis methods are presented together with methods for compression and bending interaction for slender members. In detail, specific cases of lateral torsional buckling are explained including also tapered members.

Requirements:

Passing of subject NNK.

Syllabus of lectures:

1. Introduction, lessons from collapses of structures. Classification of cross-sections.

2. Basics of buckling theory. Linear theory of buckling. Dissimilarities of plates and struts behaviour. Imperfections of plates and stiffeners.

3. Nonlinear buckling of imperfect plates.

4. Application of results in 4th class of cross-sections. Stiffened plates, exercise.

5. Compression flanges of girders in bending. Plates in shear. Buckling in shear.

6. Shear strength. Local buckling of girder webs.

7. Application and interaction of buckling in shear and bending. Design o web and flanges stiffeners. Stability of members and structures:

8. Stability and load capacity of slender members and structures.

9. Resistance of beams subjected to lateral torsional buckling.

10. Compression and bending interaction for slender members.

11. Global analysis methods.

12. Global analysis methods and resistance calculation according to the Eurocode.

13. General method.

Syllabus of tutorials:

1. Assessment of a bridge box girder with the 4 class cross section.

2. Design of a portal frame members considering different methods for global analysis.

Study Objective:

Ability to design plated and frame structures from view of stability.

Study materials:

Johansson B, Maquoi R, Sedlacek G, Müller C, Beg D. Commentary and Worked Examples to EN 1993-1-5 „Plated Structural Elements“. Luxembourg, OPOCE, 2007. ISSN 1018-5593

Boissonade, N., Greiner, R., Jaspart, J.-P., Lindner, J. Rules for Member Stability in EN 1993-1-1: Background documentation and design guidelines by TC 8. ECCS, 2006. ISBN 92-9147-000-84

ČSN EN 1993-1-1 Navrhování ocelových konstrukcí. Část 1-1: Obecná pravidla a pravidla pro pozemní stavby. ČNI, 2006.

ČSN EN 1993-1-5 Navrhování ocelových konstrukcí. Část 1-5: Boulení stěn. ČNI, 2008.

Ziemian, R.D. Guide to Stability Design Criteria for Metal Structures, 6th ed. Wiley, 2010. ISBN 978-0-470-08525-7

Note:

Further information:

http://people.fsv.cvut.cz/~machacek/prednaskyStabilita.htm

Time-table for winter semester 2024/2025:

Time-table is not available yet

Time-table for summer semester 2024/2025:

Time-table is not available yet

The course is a part of the following study plans:

• Stavební inženýrství, obor Konstrukce pozemních staveb (compulsory elective course)
• obor Konstrukce a dopravní stavby, zaměření Inženýrské konstrukce (compulsory elective course)
• obor Konstrukce a dopravní stavby, zaměření Dopravní stavby (compulsory elective course)
• Stavební Inženýrství - konstrukce a dopravní stavby, specializace Inženýrské konstrukce (compulsory elective course)
• Stavební Inženýrství - konstrukce a dopravní stavby, specializace Dopravní stavby a geotechnika (compulsory elective course)
• Stavební inženýrství - pozemní stavby, specializace Projektování pozemních staveb (compulsory elective course)
• Stavební inženýrství - pozemní stavby, specializace Statika pozemních staveb (compulsory elective course)