Steel and Composite Structures

Code:

MESTEC07

Acronym:

EMM

Keywords
Classification	Keyword
OFICIAL	Construction and Civil Engineering

Instance: 2024/2025 - 2S

Active?	Yes
Web Page:	http://moodle.up.pt
Responsible unit:	Department of Civil and Georesources Engineering
Course/CS Responsible:	Master in Civil Engineering Structures

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
MESTEC	7	Syllabus	1	-	6	49	162

Teaching language

Suitable for English-speaking students

Objectives

Based on the knowledge gained in the study of Strength of Materials complemented with concepts from the Theory of Instability and with specific regulations, a series of common problems in the area of Steel and Composite Steel-concrete structures are proposed. These applications will allow future engineers an easy integration into practical civil engineering activity. 

Learning outcomes and competences

This course aims at gathering knowledge of Strength of Materials and Theory of Instability, and learning the philosophy and dispositions of Eurocodes EC3 and EC4 to build competences for the design of steel and composite structures. 
By practical resolution of different examples, the most common design solutions will be presented,

Working method

Presencial

Pre-requirements (prior knowledge) and co-requirements (common knowledge)

The student should have knowledge of Strength of Materials.
It is also recommended that the student has knowledge of codes regarding the characterisation of design loads and limit states (EC1).

Program

1. Structural analysis
Global analysis of steel frames: P-Delta and P-delta effects. Elastic vs plastic analysis, simplified vs exact 2nd order analysis. Restrained and unrestrained frames.

2. Materials (EC3)
Mechanical properties of steel. Steel products (reference to steel profiles of European, British and American series).

3. Classification of cross-sections
Classification of cross-sections according to EC3. Determination of effective class 4 sections.

4. Design of tension and bending elements
Design of structural elements in tension and bending. Shear resistance of cross-sections. Interaction between bending moments and shear forces. Interaction between bending moment and axial forces.

5. Steel connections
Basic principles in the design of bolted joints: design of the flexible and stiff joints.
Welded joints: design of welds for the flange-web connection of the steel beam.

6. Design of bars in compression
Study of structural elements subjected to compression forces. Critical Euler buckling load. Slenderness of an element in compression. 
Design of compression elements according to EC3. Direct design of members formed by associations of angles: reference to the design of lattice structures. Buckling lengths of structural elements integrated in plane frames of regular geometry: application of EC3 criteria.

7. Lateral-torsional buckling of structural elements
Critical buckling moments: exact and approximate formulae. Lateral buckling coefficients.
Equivalent moment coefficients. Effect of the level of application of loads. Design and verification of stability of beam-columns subject to lateral bending/ torsional buckling according to EC3.

8. Design of beam-column elements. Assessment of slenderness and interaction resistances. Verification of resistance and stability according to EC3.

9. Steel-concrete composite structures
Introduction to the study of composite steel-concrete structures. Behaviour of composite steel-concrete beams. Design principles according to EC4. Classification of composite steel-concrete cross-sections. Design of composite steel-concrete beams according to EC4. Influence of constructive process. Effects of shrinkage and creep. Verification for service load combinations.
Design of shear connection using headed stud connectors.
Design of composite steel-concrete columns.

Mandatory literature

Simões Rui; Manual de Dimensionamento de Estruturas Metálicas, CMM, 2005. ISBN: 972-98376-6-1
EN 1993-1-1:2005 (Eurocódigo 3)
EN 1993-1-8:2005 (Eurocódigo 3)
EN 1994-1-1:2004 (Eurocódigo 4)
Regulamento de Segurança e Acções (RSA)
ESDEP
Elsa Caetano; Estruturas Metálicas e Mistas, transparentes de apoio às aulas teóricas e práticas, 2008/09
José Miguel Castro; Slides de apoio às aulas teóricas e práticas
Luis Calado, João Santos; Estruturas mistas de aço e betão. ISBN: 9789728469849
Jean-Pierre Jaspart, Klaus Weynand; Design of joints in steel and composite structures, ECCS, 2016. ISBN: 978-92-9147-132-4

Complementary Bibliography

Arguelles Álvarez, Ramón 070; Estructuras de acero. ISBN: 84-930002-8-0 (vol. 1)

Teaching methods and learning activities

Teaching methodologies involve the study of main themes related to the design of steel and composite structures, analysis, discussion and critical interpretation of results, using practical examples. This will stimulate the development of self-competences regarding problem formulation and design verification.

keywords

Technological sciences > Engineering > Civil engineering > Structural engineering

Evaluation Type

Distributed evaluation with final exam

Assessment Components

Designation	Weight (%)
Exame	70,00
Trabalho prático ou de projeto	25,00
Trabalho de campo	5,00
Total:	100,00

Amount of time allocated to each course unit

Designation	Time (hours)
Elaboração de projeto	25,00
Estudo autónomo	20,00
Frequência das aulas	50,00
Trabalho de campo	5,00
Total:	100,00

Eligibility for exams

Achieving final classification requires compliance with attendance at the course unit, according to the MIEC assessment rules. It is considered that students meet the attendance requirements if, having been regularly enrolled, the number of absences of 25% for each of the classes’ types is not exceeded.

Calculation formula of final grade

The final grade is based on a distributed evaluation and a final exam. The final approval of the student requires a minimum classification of 8,0/ 20,0 in the final exam. The distributed evaluation has an optional character, consisting of two practical assignments to be done individually or in groups of 2 to 3 students and of the participation in a course activity. All evaluation components are expressed on a scale of 0 to 20.

The final grade is calculated by the following formula:

CF = max {CT ; EF}

where,

CT = WD / 5 x (2xT1+3xT2) + WB x1 + WE x FE

WE - Weight of the distributed assessment classification

WB - Weight of the participation in a course activity

WF - Weight of the classification of the exam

T1 - grade of assignment 1

T2 - grade of assignment 2

FE - grade of the final exam.

The weights associated with the indicated grades are as follows:

WD = 25%
WB = 5%
WE = 70%

NOTE 1: The assignments and participation in a course activity associated with the distributed component are optional. If the student does not perform any of these assignments, the respective weights are added to WE.

NOTE 2: All students that are registered in the course are classified according to this method.

NOTE 3: The classification of the assignments of previous years cannot be transferred to the present academic year.

Examinations or Special Assignments

.

Special assessment (TE, DA, ...)

Considering the optional character of the distributed evaluation, students with special registration will be subjected to the same evaluation rules as normal students.

Classification improvement

The improvement of classification should be made through a final exam. The final classification is not cumulative with the distributed classification.

 

Observations

Estimated working time out of classes: 4 hours

NOTE: The assessment procedure and the calculation of the classification may be modified according to the restrictions imposed by the present pandemic context.