Ing - Civ (Mag.)(ord. 270) - MI (488) INGEGNERIA CIVILE - CIVIL ENGINEERING
094801 - PRECAST STRUCTURES
The course aims at providing the students the fundamentals about the behaviour, concept and design of precast concrete structures, as also compared to "conventional" cast-in-situ reinforced concrete structures.
The most significant innovations in the field of materials (self-compacting concrete, fibre reinforced concrete, self-healing cement based materials, alkali activated materials, non metallic reinforcement), components (connections), design (earthquake resistance design, durability design) and production/manufacturing issues (additive manufacturing, 3D printing) will be highlighted with the aim of enabling the students not only to confidently use consolidated knowledge (as in current standards and design codes) but also to effectively master innovation in one of the most challenging and dynamic sectors of civil engineering.
Risultati di apprendimento attesi
Expected learning results will include:
- knowledge of the fundamentals of precast concrete behaviour in different transient, persistent and accidental design situations, also with reference to structural typologies, materials, components and (sub) assemblies
- ability to apply the aforementioned knowledge to the solution of simple "example problems"
- ability to effectively report and motivate, orally, in the solution of the proposed examples, about the reliability of the assumptions and of the adopted methodologies and of the obtainable results; rigorousness of mathematical demonstrations, if any, will also be required
General aspects. - The concept of industrialization of constructions. Current situation and future prospects. Lightweight and heavy precast. General criteria for the project. Tolerances design. Quality controls. Implementation, handling and transport problems.
Materials. The materials for prefabrication. Uniaxial compression and tension concrete behaviour: experimental results and constitutive models. Multi-axial behaviour. Fibre reinforced materials. Fire behaviour.
Elastic behaviour of framed structures. Stability of the whole structure. Bracing systems and action of diaphragm, construction typologies. Distribution of horizontal forces: calculation examples. Shear walls: calculation of the deformability in the presence of openings; simplified methods (Rossman and Albiges and Goulet). Analysis of the second order in the elastic range. Critical load and the collapse of some particular patterns: some significant examples. Stability of equilibrium. The elastic stability of the beam during lifting, transport and assembly.
Skeletal structures. Construction types. The bending behaviour of reinforced concrete and prestressed concrete section: moment-curvature diagrams. Frame instability: effects of geometrical and mechanical non-linearity. Distribution of non-linear horizontal actions. Braced systems. Prefabricated beams: typologies, design, verification and construction details. Prefabricated pillarcolumnss: types, design, verification and construction details.
The connections. The dowel-action : experimental results and model calculations. Introduction to fracture mechanics: the problem of the anchor bolt. Lifting devices: types, sizing and verification. Fasteners and Support: types, sizing and verification.
D-regions. The “Strut and Tie” method. Deep corbels. Beam-column nodes. Foundation elements.
They will be focused on the calculation of horizontal actions, the instability of the frames and reinforced concrete and pre-stressed section in the presence of axial force and bending (moment-curvature diagram and interaction domains M-N at the Ultimate Limit States) and connection design. A technical visit and seminars aimed to establish contact with the industries in the sector will be organized.
Students will be required to be well versed in the fundamentals of structural analysis of planar frame structures as well as in the analysis and design of reinforced concrete structures.
(typically the aforementioned knowledge is obtained in courses such as Structural Analysis and Design, Reinforced Concrete Design)
Modalità di valutazione
The exam consists of an oral colloquium in which the students will be asked to approach two to three simple example problems, focused on the main topics of the course, in order to demostrate
- the level of knowledge they have on the fundamentals of precast concrete behaviour in different transient, persistent and accidental design situations, also with reference to structural typologies, materials, components and (sub) assemblies
- their ability and confidence in applying the concepts related to the aforementioned knowledge to the solution of simple "example problems"
- their ability to effectively report and motivate, in the solution of the proposed examples, about the reliability of the assumptions and of the adopted methodologies and of the obtainable results, together with rigorousness of mathematical demonstrations, if any.
Reference teaching materials will be distributed during the lessons.Kim S. Elliot, Precast Concrete Structures, Second Edition, Editore: CRC press, ISBN: 9781498723992
Tipo Forma Didattica
Ore di attività svolte in aula
Ore di studio autonome
Laboratorio Di Progetto
Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua
Disponibilità di materiale didattico/slides in lingua inglese
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese