Learning objectives
Knowledge and understanding:
Knowledge of the mechanical behavior of concrete structures and theoretical models to describe them.
Knowledge of code rules (Euroceods2) for the design of reinforced concrete structures. Knowledge of the detailing and arrangement of reinforcement in the main structural elements.
Skills:
Ability to choose, arrange and pre-design the different structural elements that constitute a simple reinforced concrete building. Ability to write the report and to draw the reinforcements.
Making judgments:
The student must be able to choose and set the proper dimensions of structural elements
Communication skills:
During the course the student should improve his technical dictionary.
Learning skills:
The student must acquire the ability to select the most appropriate design choices also considering options that are not perfectly identical to those given during the course. He will also be able to consult the main reference books of the field
Prerequisites
There are no mandatory propedeuticities. Anyway, basic concepts on stress analysis and strength of material, are required.
In particular, the following topics are used during the course:
statically determinate beams and cantilevers, trusses, stresses in a beam, principle of virtual works, analysis of loads, Winkler's beam, plates.
Course unit content
Theoretical aspects and practice for the design of reinforced concrete structures (buildings, infrastructures, etc.). Furthermore, the design project of a simple reinforced concrete building will be developed completely. The topics are the ones contained in the Eurocode 2 standard code.
The main topics are: bending and axial load, shear, torsion, serviceability limit states, prestressed concrete, strut and tie models, design of beams, columns, slabs, stairs.
Full programme
Numbers [] refer to recommended books
1) Mechanical properties of concrete: compressive and tensile strength, modulus of elasticity, combined stress behavior. [5,9,11]
2) Steel reinforcement: monotonic stress-strain law, yield stress, bond characteristics. [5,9,11]
3) Characteristic and design actions, partial safety factors, load combinations [5,9,11]
4) ULS for flexure and axial load. Strain diagram at ultimate limite state. Ultimate tensile and compression axial load. Members subjected to flexure. M-N interaction diagrams. Biaxial bending and axial force. [5,9,11]
5) ULS for shear. Member not requiring shear reinforcement, standard method, variable strut inclination method. Dimensioning of web reinforcement and detals. [5,9,11]
6) ULS for torsion. Behaviour of solid and thin-walled cross-section, variable angle truss mode, combined shear and torsion. [5,9,11]
7)Serviceability limit states. Control of stress. Cracking axial load and bending moment. Stabilized cracking and crack spacing. Tension stiffening. Control of cracking and evaluation of crack width. Bending moment-curvature diagram, checking deflection. [5,9]
8)Detailing of reinforcement. Spacing bars, anchorage of reinforcement, laps and mechanical couplers. Spliced bars. Detailing of members. Minumum reinforcement, details of anchorage, regions with discontinuity in geometry and action. [9]
9)Columns, beams, slabs, walls, deep beams, footings.
10) Prestress: prestressing cables pre-tensioned and post-tensioned, external prestressing, equivalent actions. Resolution of statically indeterminate beams prestressed cable, concurring.
Loss of prestressing: release of the strands, friction, return of anchors, shrinkage, creep, relaxation of prestressing steel. [3,5,12]
11) Creep and shrinkage: behavior of concrete over time, superposition in time, AAEM method, stress distribution in columns, prestressed beams and composite beams, time behavior of continuous beams, isomorphism theorems. [2]
12) Structural Analysis: strut and tie models for the design of corbels, walls, nodes, beam-column joints. [5,11]
13) Structural analysis: linear elastic analysis with and without redistribution, plastic analysis, nonlinear analysis, [11]
14) Plates: fundamentals of design and arrangement of reinforcement, punching. [4,10]
15) Foundations: footings, foundation beams [7]
Bibliography
Slides, excel files, movies shown during the course are available on the platform Elly. Sides projected during the course contain figures and equations but no comments. Therefore, the frequency of the course is recommended.
Adopted reference book
[1] UNI-EN 1992-1-1:2005, "Eurocodice 2- Progettazione delle strutture in calcestruzzo - Parte 1-1: Regole generali e regole per gli edifici", 2005.
The lectures are extracted from the following books, available in the library and referred to in the list of topics of the course
[2] D. Ferretti , I. Iori, M. Morini " La stabilita`delle strutture: il caso delle costruzioni in cemento armato", McGraw-Hill Italia, 2002.
[3] E.F. Radogna "Tecnica delle costruzioni ", vol.2 , Zanichelli, 2000.
[4] R. Favre et al., Progettare in calcestruzzo armato : piastre, muri, pilastri e fondazioni , Milano, Hoepli, 1994.
[5] Aicap, "Guida all'uso dell'Eurocodice 2", vol.1, AICAP, Roma, Edizioni Pubblicemento, 2006. http://www.progettoulisse.it/pubblicazioni.php
[6] R.P. Johnson, "Composite structures of steel and concrete", Wiley and Sons ltd, 2004
[7]R. Lancellotta, J. Calavera, "Fondazioni", Mc Graw-Hill, 2003
[8] A. Migliacci, "Progetti di strutture", CEA, 1991
[9] Cosenza, Manfredi, Pecce, Strutture in cemento armato. Basi della progettazione, Hoepli, 2008
[10] Gambarova, Coronelli, Bamonte, Linee guida per la progettazione delle piastre in c.a., Patron, 2008
[11] Angotti, Marro, Giglia, Orlando, Progetto delle strutture in calcestruzzo armato con l'Eurocodice UNI-EN 1992-1-1 e le Norme Tecniche per le Costruzioni, Hoepli, 2011
[12] Mezzina, Fondamenti di Tecnica delle Costruzioni, Citta' Studi Edizioni, 2013
Teaching methods
-Frontal lectures using the blackboard for theory and some exercises,
-Frontal exercise where the step-by-step design project of a RC building is described
-Design project of a RC building (report and drawings of the structures) whose architectural drawings are provided on Elly platform. The design project is done by groups of students (max 4).
Assessment methods and criteria
Written and oral examination with discussion of the design project
Written (2/3)
Knowledge of the topics of the course (50%);
Ability to solve an exercise similar to the one explained during the class (50%)
Oral - discussion of the project (1/3)
Knowledge of the topics of the course (60%); Communication skills (10%); Judgement ability (30%)
Other information
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