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TKT4230 Steel Structures 2
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TKT4230 Steel Structures 2 Course information 2018 - preliminary Course coordinator: Aase Reyes – Phone no.: (735) 94 524 – Office: 3-99 (MTI) - e-mail address: [email protected] Learning outcome Steel Structures 2 continues with steel design topics dealt with in Steel Structures 1, covering more advanced structural elements and applications, and aiming for a wider field of application. The course presents the theory for elastic bending of plane plates and for plate buckling, capacity models for plates and plated components, lateral torsional buckling of beams and design of bracing systems. Further topics are design for fire resistance of steel structures and design for fatigue loads. Steel Structures 2 has these learning objectives: Knowledge about: Calculation of capacity and load resisting mechanisms for cross-sections and structural elements. The theory for elastic plate bending and plate buckling, for in-plane axial force and shear force. Effect of stiffeners on plate buckling behaviour, effect of elastic restraints, and buckling for concentrated loads on plate edge. Torsional effects for members and cross-sections. Torsional buckling and torsional flexural buckling for columns Elastic lateral-torsional buckling for beams, with effect of load case and moment distribution, load application height and mono-symmetry of cross-section. Behaviour of steel at elevated temperature in fire, fire conditions and fire design. Design for fatigue. Capacity for joints in buildings, bolted and welded solutions, frame corners, strengthening with stiffeners, classifications of joints for structural analysis. Skills: Calculate capacity for sections and members with standard cross-sections or thin walled sections made from plate parts, included stiffeners, following the rules of Eurocode 3 and accepted design formats. Calculate lateral torsional buckling resistance of beams, and capacity of slender beams with elastic restraints from connected elements. Calculate capacity and behavior of simple joints, bolted or welded, and classify and model these for structural analysis. General competence: The theoretical basis for analysis and design of components as beams and columns in steel, for all cross-sectional shapes and components used in steel structures, and for all relevant instability and failure modes. Understand and apply the provisions and formulas for design, as given for instance in Eurocode 3, and to know the scope of the rules. Design of advanced steel components and structures, and verification of capacity. Course content The course covers more advanced topics in steel design. These are elastic bending of plates, theory for elastic buckling of axially loaded and shear loaded plates, effect of stiffeners, capacity of plates and plated structures, shear lag, advanced cross-sections, joints, cross sectional classes, torsion, lateral torsional buckling of beams, torsional buckling and torsional-flexural buckling. Further topics are behaviour of steel structures exposed to fire and design for fatigue loading. The course gives examples of structures and components, as large steel beams, thin walled sections, stiffened plate elements, bridge box cross-sections. Teaching personnel Faglærer Aase Reyes [email protected] Materialteknisk (MTI)*3-99 (73 5)9 45 24 http://www.ntnu.no/ansatte/aase.reyes Research Assistant (Vit. Ass.) Henrik Granum [email protected] Materialteknisk (MTI) 3-44 (73 5)9 47 00 http://www.ntnu.no/ansatte/henrik.granum
Transcript of TKT4230 Steel Structures 2
TKT4230 Steel Structures 2Course information 2018 - preliminaryCourse coordinator: Aase Reyes – Phone no.: (735) 94 524 – Office: 3-99 (MTI) - e-mail address: [email protected]
Learning outcome
Steel Structures 2 continues with steel design topics dealt with in Steel Structures 1, covering more advanced structural elements and applications, and aiming for a wider field of application. The course presents the theory for elastic bending of plane plates and for plate buckling, capacity models for plates and plated components, lateral torsional buckling of beams and design of bracing systems. Further topics are design for fire resistance of steel structures and design for fatigue loads.
Steel Structures 2 has these learning objectives:
Knowledge about:
Calculation of capacity and load resisting mechanisms for cross-sections and structural elements. The theory for elastic plate bending and plate buckling, for in-plane axial force and shear force. Effect of stiffeners on plate buckling behaviour, effect of elastic restraints, and buckling for concentrated loads on plate edge. Torsional effects for members and cross-sections. Torsional buckling and torsional flexural buckling for columns Elastic lateral-torsional buckling for beams, with effect of load case and moment distribution, load application height and mono-symmetry of cross-section. Behaviour of steel at elevated temperature in fire, fire conditions and fire design. Design for fatigue. Capacity for joints in buildings, bolted and welded solutions, frame corners, strengthening with stiffeners, classifications of joints for structural analysis.
Skills:
Calculate capacity for sections and members with standard cross-sections or thin walled sections made from plate parts, included stiffeners, following the rules of Eurocode 3 and accepted design formats. Calculate lateral torsional buckling resistance of beams, and capacity of slender beams with elastic restraints from connected elements. Calculate capacity and behavior of simple joints, bolted or welded, and classify and model these for structural analysis.
General competence:
The theoretical basis for analysis and design of components as beams and columns in steel, for all cross-sectional shapes and components used in steel structures, and for all relevant instability and failure modes. Understand and apply the provisions and formulas for design, as given for instance in Eurocode 3, and to know the scope of the rules. Design of advanced steel components and structures, and verification of capacity.
Course content
The course covers more advanced topics in steel design. These are elastic bending of plates, theory for elastic buckling of axially loaded and shear loaded plates, effect of stiffeners, capacity of plates and plated structures, shear lag, advanced cross-sections, joints, cross sectional classes, torsion, lateral torsional buckling of beams, torsional buckling and torsional-flexural buckling. Further topics are behaviour of steel structures exposed to fire and design for fatigue loading. The course gives examples of structures and components, as large steel beams, thin walled sections, stiffened plate elements, bridge box cross-sections.
Teaching personnel
Faglærer
Aase Reyes
Materialteknisk (MTI)*3-99
(73 5)9 45 24
http://www.ntnu.no/ansatte/aase.reyes
Research
Assistant
(Vit. Ass.)
Henrik Granum
Materialteknisk (MTI) 3-44
(73 5)9 47 00
http://www.ntnu.no/ansatte/henrik.granum
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Learning methods and activitiesLectures and weekly exercises, laboratory demonstrations and building project with design, construction and testing of truss structure made from aluminium profiles. 2/3 of the assignments must be approved prior to the examination. If there is a re-sit examination, the examination form may be changed from written to oral. The lectures and exercises are in English when students who do not speak Norwegian take the course. If the lectures are given in English the Examination papers will be given in English only. Students are free to choose Norwegian or English for written assignments.
Compulsory assignments
Exercises & laboratory activities.
8 out of 13 exercises must be delivered and accepted in order to be allowed to take exam. Solutions will be published.
Laboratory exercise (design and construction of alu-truss) is compulsory, including participation in laboratory loading test afterwards.
Recommended previous knowledge
Statics and Mechanics, steel course TKT4170 Steel Structures 1 or similar, covering elastic and plastic capacity of members, design of beams, columns, beam-columns, and simple connections as bolts and welds.
Course material
PK. Larsen: "Dimensjonering av stålkonstruksjoner", 2. utg., 2010, Fagbokforlaget.NS EN 1993-1-1 Design of steel structures, General rules and rules for buildings. NS EN 1993-1-5 Design of steel structures, Plated structural elements. NS EN 1993-1-2 Design of steel structures, Structural fire design. Stålkonstruksjoner - Profiler og formler (profile data and formula collection), Tapir.
Literature/Textbook in English:
NS Trahair, MA Bradford, DA Nethercot, L Gardner: ”The behaviour and design of steel structures to EC3", 4th ed., 2008, Taylor & Francis.
How to get Eurocode 3The University has a license for a limited number of printouts of Eurocode 3. To get access to these copies you need to have a NTNU IP address, which you will have if you use a computer that is connected to the internet here at NTNU or by VPN. (A wireless connection may not work without VPN at NTNU either).More information is found at https://innsida.ntnu.no/wiki/-/wiki/Norsk/StandarderThe main focus in this course is EN-1993, part 1-1 and part 1-5. The appendix in EN-1999, part 1-1 on lateral torsional buckling is uploaded on Blackboard under “Lecture Notes/Formulae lateral torsional buckling”.NTNU has a quota of 200 free copies a year. After the quota is used you must buy copies of the Eurocode from Standard Norge, but at a 70% discount. Enter the discount code NTNU2677
Timetable
Time Monday Tuesday Wednesday Thursday Friday
0815-0900
0915-1000
1015-1100
1115-1200
1215-1300 Lecture Lecture
1315-1400 EL3 EL3
1415-1500 Exercise
1515-1600 S2
Weekday Time Place Activity
Monday 1215 – 1400 Auditorium EL3 Lecture
Friday 1215 – 1400 Auditorium EL3 Lecture
Tuesday 1415 – 1600 S2 Supervision exercise
Monday 1600 Shelves KT (Dept of Structural Eng) OR online in Blackboard Submit exercise
Link to timetable online: https://www.ntnu.no/studier/emner/TKT4230#tab=timeplan
Exercises
Weekly exercises will be given, 13 in total. 2/3, i.e. 8 have to be approved in order to take the exam. The exercises will be published online on Blackboard. An overview of which student assistant (with contatct information) is correcting/registering your exercise is given below.
The exercises is submitted in marked shelves at the Department of Structural Engineering or on Blackboard.
The exercises must be submitted Mondays, before 16:00. You can submit either by paper in the inboxes, or digitally on Blackboard. If you want the exercise to be corrected we advise you to hand them in on paper. Please write a small note to the student assistant on the first page that you want the exercise to be corrected. They will be registered and returned in the out-boxes within the following Friday 12:00.
The exercises will mainly be supervised and registered/corrected by the student assistants. These are
Stud.ass
e-mail adress corrects with last name beginning with
Andreas Gladbakke [email protected] Group A: A-H
Lars Henning Krokengen [email protected] Group B: J-O
Ruben Løland Sælen [email protected] Group C: P-Å
Plan of lectures
is updated here https://www.ntnu.no/wiki/x/tIcGBg
Reference group
The course coordinator, teaching assistant and the reference group will have two meetings during the semester to discuss the course. Contact the reference group if there are anything with the course that you want to address.
The student representatives in the reference group are:
o Einar Sagerud [email protected]
o Marte Midttun [email protected]
o Mertz Antoine [email protected]
o
o
Exam
8. December 2018 kl 0900 – 1300
Postponed exam (continuation exam) can be changed from written to oral form.
Plan of lectures (preliminary)
Week Dates TOPICS
34 August 20. & 24. Course start & Introduction
1 Buckling of plates and plated structures
Elastic and plastic capacity of sections. Cross sectional class.
Plate bending and elastic plate buckling.
35 August 27. & 31. Plate bending and elastic plate buckling (cont'd.)
Critical load for simple rectangular plates
36 September 3. & 7. Yield line theory for plates
37 September 10. & 14. Plate buckling in Eurocode 3. Design examples.
Stiffened plates,model with column on elastic support, orthotropic plate theory, capacity models.
38 September 17. & 21. Stiffened plates,model with column on elastic support, orthotropic plate theory, capacity models. (cont'd)
Plates subjected to shear, transverse loads, design of stiffeners and detailing
39 September 24. & 28. 2 Torsional effects
Review torsion, intro lateral torsional buckling (LTB)
40 October 1. & 5. Lateral torsional buckling
Torsional buckling
41 October 8. - 12.
(no lectures)
Laboratory - building project
Design and building of truss structure in aluminum.
Competition; Which group gets the best self-weight/failure load ratio?
42 October 15. - 19.
(no lectures)
Testing of trusses. All the trusses will be tested to find the stiffness and the ultimate strength.
43 October 22. .
4 Stiffened plates in steel bridges and suspension bridges (Guest lecturer: Liv Eltvik, Aas-Jakobsen)
5 Fire Design: Self study
44 October 29. & 2. 6 Joints and connections (Lecturer: Arne Aalberg)
Rigid, semi-rigid and pinned joins.
Beam to column joints
45 November 5. & 9. Frame corners, welded joints, T-stub model, failure around concentrated bolt force
46 November 12. & 13. 3 Fatigue, fatigue life calculations (Guest lecturer: Erling Østby, DNV)
Introduction, fatigue curves, design example.
47 November 19. & 23. Summary/Repetition/Conclusion
