03480 - Structural Analysis and Design II

Learning outcomes

The course, addressed to students who have already taken "Structures in Architecture" lessons, develops the general and essential concepts related to the theory and practical design of steel structures.

Course contents

Introduction
Course contents & objectives.

Basic aspects
The design process and the role of the structural engineer.
The verification methodologies: the allowable stress method and the limit state method.
The framework of the current technical codes (Italian codes and Eurocodes).

The “steel” material
Fe-C alloys.
Steel working.
The working process.
Chemical composition and state diagram of steel.
Thermal treatments.
Mechanical characterisation tests.
The products for the steel structures and the classification of the commercial frame sections.
Mechanical and geometric imperfections.

Steel structures: general properties and conceptual approach to structural design
Properties of steel structures and fundamental design issues.
Advantages and disadvantages of steel structures with respect to r.c. structures.
The system of vertical-resisting elements (systems of beams and columns).
The system of lateral-resisting elements (bracing systems, pendular systems and moment-resisting frames).

Steel structures: the verifications of the individual structural members
The verifications: deformability, strength and buckling.
The deformability verifications: code limitations, elementary schemes, numerical applications and importance for the dimensioning of the structural members.
The strength verifications: resistance criteria (Tresca and Von Mises), diffusive zones and Bernoulli zones, tension, compression, bending moment, shear, torsion, bending and axial force, numerical applications.
The buckling verifications: the ideal (Euler) bar, the “omega” method, notes on the lateral and lateral-torsional buckling of structural components and on the buckling of web panels, numerical applications. 

Steel structures: the connections
General properties.
Bolted conncetions.
Welded connections.
Typical beam-beam joints.
Typical column-beam joints (fixed joints, semi-rigid joints, hinge joints).
Typical column-foundation joints (base anchor plate, set screws, stiffening ribs).

Steel structures: structural typologies
One-storey industrial buildings: corrugated sheet, purlins, truss, columns, horizontal and vertical bracing systems, base anchor plate.
Multi-storey buildings: steel floors, primary and secondary beams, columns.

Development of a design project of a multi-storey steel building structure (together, in class)
Project work to be developed with reference to a multi-storey steel building structure:
Choice of the building and identification of the structural plan.
Design and verifications of the system of the vertical-resisting elements.
Design and verifications of the system of the lateral-resisting elements.
Design and verifications of the connections.
Design and verifications of the base anchor plate and of the plinth foundation.

In case:
Foundation systems
Shallow and deep foundation systems.
Plinth.
Upside down girder.
Foundation bed.
Pile foundation.

Notes on seismic engineering 

Notes on wood structures

Notes on aluminium structures

Readings/Bibliography

• G. Ballio, F.M. Mazzolani, “Strutture in acciaio”, Hoepli.
• G. Ballio, C. Bernuzzi, 2004, “Progettare costruzioni in acciaio”, Hoepli.
• N. Scibilia, 2005, “Progetto di strutture in acciaio”, 4° ed., Dario Flaccovio Editore.
• V. Nunziata, 2000, “Teoria e pratica delle strutture in acciaio”, 2° ed., Dario Flaccovio Editore.
• P. Pozzati, C. Ceccoli, “Teoria e tecnica delle strutture”, Vol. 2°, UTET.
• F. Hart, W. Henn, H. Sontag, 1982, “Architettura Acciaio Edifici Civili”, 2° ed., FINSIDER Gruppo IRI (edizione FINSIDER in lingua italiana del volume “Stahlbauatlas-Geschossbauten”, 2° ed., pubblicato dall'Institut für Internationale Architektur-Dokumentation di Monaco).
• G. Giordano, 1999, "Tecnica delle Costruzioni in legno", Hoepli.

From the technic-scientific book series for the design of steel structures by ITALSIDER:

• L.F. Donato, L. Sanpaolesi, 1970, “Gli acciai e la sicurezza delle costruzioni”, Volume I.
• L. Finzi, E. Nova, 1971, “Elementi strutturali”, Volume IV.
• D. Danieli, F. De Miranda, 1971, “Strutture in acciaio per l'edilizia civile e industriale”, Volume VI.

Teaching methods

Frontal lessons mainly at the blackboard (occasional use of Powerpoint slides).

Assessment methods

Oral test.

Teaching tools

Possible lecture-notes supplied by the teacher.

Links to further information

http://www.distart.unibo.it/DISTART/default.htm

Office hours

See the website of Stefano Silvestri