Steel Structures II

Prerequisite Knowledge

Fundamental mechanics, strength of materials, statics, steel structures I.

Course Units

#	Title	Description	Hours
1	Connections	Prestressed bolts, shear transfer mechanism, slip resistance, surface categories, bolt hole types, slip-resistant bolts in the serviceability or the ultimate limit-state, prestressed bolts under shear and tension, loss of prestress, pins (geometry, failure mechanisms, verifications), hollow section joints (geometry, failure mechanisms, verifications), EC3 provisions. Application examples.	2Χ4=8
2	Moment frame joints	Beam to column joints, column bases, beam to beam joints, importance of joint behavior for the overall frame behavior, modeling of joints for static analysis, iterative procedure of member and joint design in a frame structure, component method, components of welded and bolted beam to column joints, T-stub and failure modes. Application examples.	1Χ4=4
3	Conceptual design and sizing of typical connections	Conceptual design of typical connections, beam to column connection, beam to beam, head-beam to column connection, brace to column to head-beam connection, roof bracings to girder and purlin connection, column bases. Shop drawings: general layout, assembly and part drawings, fabrication (cutting of parts, drilling of holes, assembly of transportable parts via welding), on-site erection process employing bolted connections as much as possible.	1Χ4=4
4	Seismic design	Brief introduction to the concept of capacity design, advantages of steel as structural material exhibiting good performance under seismic actions, ductile and brittle failure mechanisms of steel members and connections. Lateral load resisting systems for steel structures: Moment-resisting frames, concentrically and eccentrically braced frames, conceptual design, behavior factors, capacity design rules, ductile members, overstrength factors of brittle members, benefits of capacity design. Application examples.	3Χ4=12
5	Conceptual design of typical steel structures	Principles of conceptual design for typical one-story and multi-story steel buildings, analysis of the behavior and the function of primary and secondary elements of the load resisting system, importance of conceptual design for the safety, economy and constructability. Practical applications.	1Χ4=4
6	Overhead crane runway beams	Overhead crane types, actions, load combinations, ultimate and serviceability limit-state verifications, EC3 provisions. Application examples.	2Χ4=8
7	Design for corrosion and fire actions	Corrosion protection of steel structures, typical damage due to fire, fire protection measures, fire resistance index, effect of temperature on the mechanical characteristics of steel, standard temperature-time curve (ISO), steel temperature increase (protected and unprotected members), fireproofing materials, fire load, design actions under fire, resistance of steel sections according to EC3. Application examples.	1Χ4=4
8	Design of plate girders	Introduction to plate buckling, buckling of non-stiffened webs, category 4 sections, calculation of effective section, verifications of sections and members according to EC3, resistance to shear buckling, interaction of action effects, resistance to concentrated forces, introduction to buckling of stiffened plates. Application examples.	2Χ4=8

Learning Objectives

Upon the successful completion of the course, the students will be able to:

• Select the structural system for simple steel structures subject to static and dynamic (seismic) loads.
• Select appropriate types for section members and connections.
• Size members and connections.
• Prescribe surface protection measures.

Teaching Methods

Teaching methods	- In-class lectures. - Solution of simple examples and case studies in class. In every course section, the theoretical background is analyzed, according to the theory of mechanics and strength of materials. Then, the necessary verification checks are presented, according to Eurocode 3 provisions. Emphasis is given on connecting the theoretical background with the code provisions, so that the students can easily adjust to future changes in the code. Technical as well as construction issues are discussed, while numerical applications, inspired from actual projects, are solved as exercises.
Teaching media	PowerPoint presentations Additional material presented on the black board.
Computer and software use	Yes, for the class project.
Problems - Applications	Yes
Assignments (projects, reports)	Yes, optional group project.

Student Assessment

• Final written exam: 70%
• Mid-term exam: 30%

Textbooks - Bibliography

• I. Vayas, I. Ermopoulos, G. Ioannidis, «Design of steel structures with application examples», Kleidarithmos Publications, Athens, 2005.
• I. Vayas, C. Gantes, I. Ermopoulos, G. Ioannidis, «Application examples for special issues in steel structures», Kleidarithmos Publications, Athens, 2013.
• Educational material from the course website.

Lecture Time - Place:

• Monday, 15:45 – 17:30,
  Rooms:
  • Ζ. Κτ. 1 Πολ., Αιθ. 1
  • Ζ. Κτ. 1 Πολ., Αιθ. 7
• Wednesday, 13:45 – 15:30,
  Rooms:
  • Αιθ. 5
  • Ζ. Κτ. 1 Πολ., Αιθ. 1