Learning outcomes of the course unit
The course aims to equip students with knowledge on steel properties and behaviour so to develop the ability to simplify and analyse complex structures also using approximate methods. The fundamental dimensioning criteria and the methods for the design of steel members will be treated, and theoretical models for the students to be able to design steel members and connections in accordance with relevant Italian and European Standards will be provided. Theoretical lectures will be alternate with some practical exercitations, so to give the students, through the assignment of a team project exercise, the opportunity to develop their design skill. The practical exercises will conclude with the design of an industrial building in steel, and the preparation of a calculation report.
Reinforced and pre-compressed reinforced concrete A structures: theories and design.
Course contents summary
Steel structures. Historical background. Advantages and disadvantages connected to steel buildings. Comparisons with the behaviour of reinforced concrete structures. Normative references. Italian (D.M. LL.PP. 14/01/2008) and European (Eurocode 3) Standards. Methods of verification.
Steel properties. Material and product properties. Manufacturing process. Steel making process. Chemical composition. Heat treatments. Flat and long products. Hot rolled and cold formed products of structural steel. Sections. Mechanical properties. Experimental tests for mechanical characterization of steel: tensile test, impact test, stub column test. Structural and geometrical imperfections.
Structural modelling. Global analysis. Effects of deformed geometry of the structure. Structural stability of frames. Structural modelling for analysis. Bracing systems. Joint modelling (simple, semi-continuous, continuous joints). Imperfections for global analysis of frames. Imperfections for analysis of bracing systems.
Methods of analysis. Elastic, elastic-plastic, plastic analysis. Classification of cross-sections.
Resistance of cross-section. Tension, compression, bending moment, shear, bending and shear, bending and axial force.
Buckling resistance of members. Uniform members in compression, uniform members in bending, lateral torsional buckling, uniform members in bending and axial compression.
Connections made with bolts. Technology of bolted connections. Design resistance. Welded connections. Geometry and dimension. Design resistance.
Uniform built-up compression members. Laced compression members, battened compression members, closely spaced built-up members. Serviceability limit states verifications for buildings. Connections. Structural joints. Beam-to-column joints. Column bases-to-base plates joints.
G. Ballio, F. M. Mazzolani, “Strutture in acciaio”, Hoepli Editore, Milano, 1987.
G. Ballio, C. Bernuzzi, “Progettare costruzioni in acciaio”, Hoepli Editore, Milano, 2004.
W. McGuiire, “Steel structures”, Prentice-Hall.
UNI EN 1993-1-1:2005: “Eurocode 3, Design of steel structures - Part 1-1: general rules and rules for buildings”.
UNI EN 1993-1-8:2005: “Eurocode 3, Design of steel structures - Part 1-8: design of joints”.
D.M. LL.PP. 14/01/2008: “Norme Tecniche per le costruzioni”
The duration of the course is one academic term, and includes theory-based lessons alternating with practical exercises. The exam includes an interview regarding the completed course of study and a discussion of the project developed during the practical exercises.