STEEL DESIGN II

Single discipline educational activity

Course Sheet

Course code:

AI738

Academic Year of enrolment:

2020

Year of supply:

2021/2022

Type of Course:

Elective Course

Degree:

Course of 2nd Cycle Degree in BUILDING ENGINEERING

Disciplinary Sector:

Construction Techniques

Location:

PESCARA

Credits:

Programme Year:

Professor and Collaborators:

BRANDO GIUSEPPE

Cycle:

First semester

Hours of classroom activity:

Individual study hours:

Prerequisites:

Exam of "Tecnica delle Costruzioni"

Objectives

To provide all the elements for the design - also advanced - of steel and aluminum structures

Contents

The main goal of the course is to provide the theoretical and practical design rules for metal constructions, with particular regard to the calculation of steel structures.
In a first part, an in-depth analysis of the material properties is carried out, with an overview of its chemical composition and mechanical characteristics. Also, an examination of the available industrial products, as well as of the experimental tests that must be carried out for qualifying purpose, is given.
Subsequently, the attention will be focused on the main construction types and analysis methods that it is possible to implement according to to the classification of structural systems.
Therefore, all the checks that need to be conducted for safety assessment purposes, both locally and globally, will be presented, with emphasis on the chance to exploit the ductile resources available for class 1/2 sections.
Stability of sections, members and entire structures under different structural demands, is definitely one of the main themes that will be dealt with, highlighting the importance of imperfections and thus differentiating the case of ideal structures/members (Eulerian instability) from that of real structures/members. Furthermore, the problem of the unstable behavior of thin-walled sections will be threated.
Last - but no less important - theme is the calculation of connections (bolted and welded) and joints: it will be developed by recalling the provisions given by of Eurocode 3 Part 1-8 (component method), as well as by recalling simplified approaches, more widespread in the design italian practice.
A central element of the course will be the development of two projects. The first deals with the case of a wide span spatial reticulated roofing system. The latter, instead, concerns the case of a steel building to be designed in seismic zone according to the current methodological approaches adopted by Eurocode 8 and by the new Italian Code NTC 2018.

Extended Syllabus

-THE STEEL MATERIAL
Introduction: Introduction to the physical features of the material
Mechanical behavior of the material in tension
Failure criteria
Products
Other characterization tests
Structural typologies

-STRUCTURAL SYSTEMS AND ANALYSIS METHODS
Frames classification
Analysis methods

-CLASSIFICATION OF THE CROSS SECTIONS
Local buckling of sections
Classification of sections for profiles under compression and bending
Numerical examples of classification

-DESIGN / VERIFICATION OF SIMPLE MEMBERS
Tension
Compression without buckling.
Bending without buckling.
Stability: Ideal vs Industrial profiles (Imperfections)
Buckling in Compression
Flexural-torsional stability
Checks for members under compression and bending
Shear checks
High Section Profiles in Shear (Stability) Checks
Other checks on members
Thin walled profiles

-SIMPLE CONNECTIONS AND JOINTS
Welded connections
Bolted ConnectiOns
Types of Joints
Joints Classification
Beam-column joints component method
Calculation of MRF Buildings
Beam-column joints component method [2]
Column Base

1 st PROJECT DESIGN-DESIGN OF A SPACE ROOF
p.1. The use of steel space roofs for large-span structures
p.2. Definition of the elements and mechanical principles
p.3. Constraint/Restraint definition
p.4. Geometric modeling
p.5. Members Dsign
p.6. Mechanical modeling
p.7. Action Modeling
p.8. Linear analysis
p.9. ULS verification of structural elements by manual calculation
p.10. ULS verification of structural elements by calculation program
p.11. Optimization of the elements
p.12. Checks at the SLE
p.13. Global stability checks

-2nd PLANNED DESIGN-DESIGN OF A STEEL BUILDINGS IN SEISMIC AREA
p.14. Principles of Seismic Design
p.15. Local and global ductility
p.16. Dissipative elements in the Structural Types CBF-EBF-MRF
p.17. SLU and SLD
p.18. behaviour factors
p.19. Seismic Weight Calculation
p.20. seismic actions
p.21. Design of dissipative elements
p.22. Overstrengths
p.23. Capacity Design Criteria
p.24. Definition of the internal forces
p.25. Member/Section checks (numerical calculation)
p.26. Calculation of joints of braced structures (examples)
p.27. Simplified calculation of Joints of MRF Structures

FURTHER INFORMATION NOT REQUIRED FOR THE PURPOSE OF THE EXAM BUT WHICH WILL BE EVENTUALLY COVERED IN SEMINARS TO BE AGREED WITH THE STUDENTS:
Seminar.1. Global Stability of Metal Structures (4-hour))

Seminar.2. Fatigue (4-hour )

Seminar..3. Aluminum Structures (4-hour)

Seminar..4. Secondary Torsion Problems (4-hour)

Recommended Bibliography

G. Ballio, F.M. Mazzolani, C. Bernuzzi, R. Landolfo. Strutture di acciaio, Hoepli.

SPRINGHETTI L.I COLLEGAMENTI DELLE STRUTTURE IN ACCIAIO
PROGETTO E VERIFICA SECONDO LA NORMA UNI EN 1993-1-8

Bruneau, M; Uang, C-M; Sabelli, R. Ductile Design of Steel Structures, 2nd Edition

Methods of Provision

Conventional

Teaching Methods

-Lectures;
-Classroom exercises
-Projects revisions

Evaluation methods

Verification of learning:

Some problems that the student can carry out outside the lesson time will be suggested.
As for the design projects (spatial reticulated structure and building in a seismic area), weekly revisions are planned to verify the progress of the project.
The learning achieved on the exercises, on the project documents and on the theoretical knowledge, will be verified at the end of the course through an exam based on oral discussion.

Contacts/More Information

CONTACTS: giuseppe.brando@unich.it

Università degli Studi
"G. d'Annunzio"

Chieti - Pescara

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