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Strutture in Acciaio
Design of steel structures
Sandro Carbonari

Seat Ingegneria
A.A. 2016/2017
Credits 9
Hours 72
Period II
Language ENG

Prerequisites
Concepts of statics and structural mechanics, as well as properties of the main classes of materials used in the Civil and Environmental Engineering are assumed to be known. Furthermore, the ability to understand and produce a technical drawing is considered acquired.

Learning outcomes
KNOWLEDGE AND UNDERSTANDING:
The course aims to provide the student with the basic theoretical knowledge and practical skills required to design and assess steel structures through lectures and a designing exercise. Starting from the knowledge gained from basic courses, and specifically from the course of structural mechanics, students learn the structural conception, analysis methodologies and the professional aspects of structural design.

CAPACITY TO APPLY KNOWLEDGE AND UNDERSTANDING:
In order to successfully solve problems relevant to the design of steel structures, the student must gain critical judgment skills of typical engineering problems as well as the capability to solve the problems using methods, techniques and tools provided within the course. These skills are developed through lectures and a design tutorial.

TRANSVERSAL SKILLS:
The designing exercise, involving a critical review of several solutions, help improving the student’s critical judgment skill, as well as the self-learning skill.

Program
Concepts of structural safety are briefly recalled: the method of partial safety factors (limit state design). Actions on structures are briefly recalled, with particular focus on live loads due to wind, snow and thermal actions; load combinations for the ultimate (ULS) and serviceability (SLS) limit states. Steel materials and products: steel grades, mechanical properties and laboratory tests, flat products, long products and production processes, thermal treatments and imperfections; cross-sectional shapes of hot-rolled and cold-formed commercial structural elements. The structural conception of steel buildings: single storey and multi storey steel framed buildings. Structural analysis approaches: elastic and plastic analysis with relevant methods for the evaluation of the elements capacity; second order analyses and effects of imperfections. Design of structural steel members: design of members subjected to axial compression or tension, bending moment, shear and torsion, and combined actions, according to EC3 and the Italian Technical Code; design at service conditions (deformability and vibrations). Welded, bolted and pins connections. Technology and capacity of bolted connections subjected to shear, tension and combined tension and shear, pretensioned bolted connections. Technology and capacity of welded connections: full penetration and fillet welds; design and verification criteria of welded connections. Welded and bolted joints: joints of elements subjected to tensile and compression forces, connections with end plates (flanges) and splices, examples of beam-to-beam and beam-to-column joints. Structural stability: buckling of columns subjected to axial loads, uniaxial bending and combined actions; introduction to flexural-lateral buckling; Capacity and stability of laced and battened columns.

Development of the examination
LEARNING EVALUATION METHODS
The assessment of student learning is based on two tests: - a written test concerning the analysis and verification of a steel structure; - an oral assessment, consisting in the discussion of both the developed exercise and the written test, and in some theoretical questions on the topics covered during the course. The latter may also be in written form (if required by the presence of formulas or demonstrations), followed by an oral discussion. To access the oral examination, the student must have completed the proposed exercise and obtained a sufficient evaluation in the written test. The written and oral examinations must be sustained in the same examination session.

LEARNING EVALUATION CRITERIA
Through the presented exercises, the written and the oral assessments, the student must demonstrate to have learned the topics covered during the course and to be able to present them correctly, by adopting a proper technical terminology.

LEARNING MEASUREMENT CRITERIA
The evaluation of each test is expressed in thirtieths.

FINAL MARK ALLOCATION CRITERIA
After the oral examination, a final mark is defined for the presented exercise and for the written and oral assessments. The student is expected to pass all tests. The final mark of the course will be calculated as the average of the marks received in each test. Summa cum laude will be awarded to students who have correctly completed all the assessments and have shown an outstanding understanding in the subject.

Recommended reading
Bernuzzi C., “Progetto e everifica delle Strutture in Acciaio” Ed. Hoepli, Milano, 2015 (in Italian).
Ballio G., Bernuzzi C., "Progettare Costruzioni in acciaio", Ed. Hoepli, Milano, 2004 (in Italian).
Ballio G., Mazzolani F. M., "Strutture in acciaio", Ed. Hoepli, Milano., 2004 (in Italian).
Radogna E.F., "Tecnica delle Costruzioni - Fondamenti delle Costruzioni di acciaio", Editoriale ESA, Milano, 1989 (in Italian).

Courses

• Ingegneria Civile e Ambientale (Corso di Laurea Triennale (DM 270/04))