Steel and Composite Structures

Code:

EC0053

Acronym:

EMMI

Keywords
Classification	Keyword
OFICIAL	Structures

Instance: 2013/2014 - 1S

Active?	Yes
Responsible unit:	Structural Division
Course/CS Responsible:	Master in Civil Engineering

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
MIEC	66	Syllabus since 2006/2007	5	-	5	60	133

Teaching language

English

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. Given the reduced number of classes allowed for this subject, no particular emphasis is given to the issues related with definition of loads and design factors (RSA and EC1) and it is assumed these matters have been presented in other subjects.

Learning outcomes and competences

    

Working method

Presencial

Program

1. Materials (EC3)
Mechanical properties of steel. Steel products (reference to steel profiles of european, british and american series).

2. 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.

3. 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. Design of bars in compression
Study of study of structural elements subjected to compression forces. Critical Euler buckling load. Slenderness of compressed element.
Design of compressed elements according to REAE and 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.

6. Lateral 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.

7. Local shear buckling
Critical stresses in the elastic branch of web plates simply supported in the boundary, submitted to uniform compression and shear forces. Critical Euler stress and buckling coefficients. Interaction formulae considering a combination of compression and shear. Elasto-plastic branch. Design of horizontal and vertical web stiffeners.

8. Design of structural elements subjected to axial compression and bending moments Assessment of slenderness and interaction resistances. Verification of resistance and statbility 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.

10. Joints
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.

DEMONSTRATION OF THE SYLLABUS COHERENCE WITH THE CURRICULAR UNIT'S OBJECTIVES:
The curricular unit aims to apply previously acquired knowledge and existing codes to the design of steel and composite structures. This curricular makes the transition between theoretical learning and professional activity within the design of these structures.

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
Luis Calado, João Santos; Estruturas mistas de aço e betão. ISBN: 9789728469849

Complementary Bibliography

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

Teaching methods and learning activities

Practical course that employs knowledge from Strength of Materials to practical applications in the context of Steel Construction and Composite Steel-concrete structures.

DEMONSTRATION OF THE COHERENCE BETWEEN THE TEACHING METHODOLOGIES AND THE LEARNING OUTCOMES:
Teaching methodologies involve the study of main themes related to the design of steel and composite structures, analysis, discussion and critical interpretation of results, emphasizing the potential of written communication, 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	75,00
Teste	25,00
Total:	100,00

Amount of time allocated to each course unit

Designation	Time (hours)
Elaboração de projeto
Estudo autónomo
Frequência das aulas
Total:	0,00

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

.

Examinations or Special Assignments

The final grade is based on a distributed evaluation and a final exam. The distributed evaluation has an optional character, consisting of two practical assignements to be done individually or else in groups of 2 to 3 students. 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 = PA / 5 x (2xT1+3xT2) + PF x EF

T1 - grade of assignment 1

T2 - grade of assignment 2

EF - grade of the final exam.

The weights associated with the indicated grades are as follows:

PA = 25%
PF = 75%

NOTE 1: The assignments associated with the distributed component are optional. If the student does not perform any of these assignements, the respective weights are added to PF.

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

NOTE 3: Students who have attended the course in the previous academic year may maintain the grades of the current distributed component evaluation, maintaining, in this case, the weights specified in that academic year.

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 can be made in the same condition of the final exam, cumulative with the distributed classification.

 

Observations

Estimated working time out of classes: 4 hours