AR/0002 - STRUCTURAL DESIGN AND ANALYSIS
Academic Year 2020/2021
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FAUSTO MISTRETTA (Tit.)
- Teaching style
- Lingua Insegnamento
|[80/71] ARCHITECTURAL SCIENCE||[71/00 - Ord. 2017] PERCORSO COMUNE||6||60|
The purpose of Structural Design is the project and it is with this reference that within the Architectural faculty it provides the basics for the structural design of building. The course aims to give the student the tools to set the structural project's theme in terms of safety and integration into the architectural organism, and acquire structural design basics to understand and use with confidence procedures aimed at new and existing construction. Particularly, the student will be prepared to draw up a structural project in all its phases: design of building's structural concept according with its architectural form and with its required functional performance; choice of structural materials according to the specificity of their mechanical behaviour; definition of the shape and size of the structural elements with their connections; evaluation of the applied loads; identification of a mechanical model that takes into account the materials performance and their evolutions in time and the manufacturing processes.
The ultimate goal is to give the student the awareness of the structural design issues and the ability to understand and decide within multidisciplinary professional organizations.
Good knowledge of statics and building science; knowledge of building materials (concrete and steel), construction technologies and assembling of structural elements.
Are invoked general and essential concepts related to the theory and design of steel, concrete and masonry structures, analyzing the most significant rules of the recent Italian and European standards. The purpose of Constructions discipline is the building technical project and it is with this reference that within the Architectural Courses it provides the basics for the structural design of building.
General principles, durability and building safety, structural conception.
Construction, structure and functional works: General considerations. The interaction between worn and carrying structures. Structural simplicity. Sharing loads.
Structural Safety: A little bit of history. Deterministic procedure. Probabilistic procedure. Great negligence. The importance of execution. Design Methods in accordance with current codes. Security levels. Actions on structures.
Structural materials and their reflections on structures. General consideration. A little bit of history.
Resistance: mechanical material behavior. The effect of overloads for tense or compressed elements. Maximum resistance for inflexible elements. Fragile and ductile materials: the sectional plastic gain for the inflected elements. The effect of overloads for inflected elements. Design tips. Considerations on dimensional limits.
Stiffness: Premise. The diagrams (σ-ε) of structural materials. Considerations for the containment of deformations of structural elements.
Plasticity: Premise. Determined and undetermined structural patterns. Section profiling. The structural plastic gain.
Notes on viscosity: Premises and constitutive laws. Deformation problems. Structural problems.
Analysis of Structures: Methods for Hyperstatical Structures: Force and Movement Method. Equation of the three moments. External reactions. Internal Action Diagrams.
Steel structures: The material. The production. The imperfections. Mechanical tests for the material. Structural Types and Methods of Analysis: Classification of Frames. Methods of analysis of the framed systems. Commuter frames. The design approaches. Simple Membranes: Profile Classification. The tensed elements. Compressed elements. The inflexible elements. The elements near-inflected. Resistance of the soul to the transverse forces.
The composite elements. Reticular beams. Joints in metal structures: Bolted joints. Generality and verification of bolted joints. Welded joints. Generality, resistance and verification of welded joints. Mixed Unions.
Concrete Structures: General on Concrete. Mechanical Properties of Concrete. Concrete Viscosity. Structural effects of viscosity. Behavior of reinforced concrete sections.
Compression and tensile stress: reinforced concrete pylons. Cracking calculations.
Bending Moment: Analysis of Sections. The flexural cracking of the beams. Deformation analysis.
Shear effort: Design of elements with and without shear reinforcement.
The inflected beams: Models for the design of inflected beams. Balanced patterns with struts and tie rods. Flectional deformations of beams.
Eccentric Axial forces: Elastic Calculation of the Section. Calculation of breaking section. Flexible behavior of pillars.
Structural elements for foundations: Isolated foundations. Continuous foundations. Support elements.
Lectures (40 hours) and applicative Exercises (20 hours). During the lectures, the theoretical bases of the discipline are described, with bottom-up learning methods, in which, starting with case studies of easy comprehension, theoretical discussion is developed. Testing is done during the exercises, consisting in the preparation by the students of two very simple projects (one in steel and one in reinforced concrete), assisted in the classroom by the teacher and the tutors. The outcome of the exercises is then discussed publicly, to share among the students the various issues that could be emerged during the work. The exercises are carried out in small groups of up to three students. In addition at least two visits to significant construction sites are planned.
Verification of learning
The exam provides for an oral exam during which each student, explaining the exercises made during the course, must demonstrate knowledge of the theoretical bases for analysis and design of simple structures by soliciting manual procedures; Design the reinforcement in concrete structures and connections in steel structure; Perform resistance analysis by selecting significant sections.
The grades are on a scale of 30. The final grade takes into account the following elements: 1. knowledge of the theoretical basis and ability to apply them to the real cases; 2. Correctness of the procedure identified for the solution of the question; 3. property of technical language 4. demonstration of understanding the meaning and importance of the structural concept in the architectural design. The satisfaction of the aspects n. 1 and 2 is a necessary condition for achieving an evaluation up to 26. Grades above 26 will be awarded to students who will demonstrate that they master all four aspects listed above.
- L’Architettura dell’Equilibrio e della Deformazione, Seconda Edizione, Vol. I
di: Antonio Migliacci, Editore Casa Editrice Ambrosiana, 2006, 400 pagine;
- Teoria e Tecnica delle Costruzioni, Introduzione all’Analisi Strutturale
di: Mario Caironi, Pietro Gambarova, Sergio Tattoni, Editore PARAVIA, 1999, 496 pagine
- Esercizi di Tecnica delle Costruzioni
di: Pietro Gambarova, Ezio Giuliani, Paola Ronca, Sergio Tattoni, Editore CITTA’STUDI, 2007, 291 pagine
- Progettare costruzioni in Acciaio con CD-ROM
di: Giulio Ballio, Claudio Bernuzzi, Editore HOEPLI, 2004, 347 pagine.
- Tecnica delle Costruzioni, Cemento armato - Calcolo agli stati limite, Vol. II. 2A e 2B
di: Giandomenico Toniolo, Editore MASSON, 1993.
In addition to the suggested texts, teaching is supported by the materials downloadable from the teacher's site, consisting of lecture slides, examples of exercises, simple software for checking the results of calculations, video illustrations, which can also be projected into the class during the lectures.