72816 - Laboratory of Bridge Design M

Learning outcomes

Beside completion of the knowledge acquired in the BRIDGE DESIGN M parallel course and upon completing the required credits, the student learns to design of a simple beam bridge (either a prestressed reinforced concrete bridge or a two-beam bridge with a steel-concrete composite structure). During laboratory activities, the design and dimensioning aspects of beam bridge decks and related substructures are thoroughly explored. The concepts covered are subsequently utilized in numerical and graphical applications, allowing the student to develop solid operational skills for a swift entry into the professional bridge design sector.

Course contents

1. THE DESIGN OF A BRIDGE DECK
Characteristics of the design project
Elements of road geometry
The transversal cross-section of the bridge deck
The crash barriers

2. DESIGN CRITERIA OF THE BRIDGE DECK
The general approach of the design
The slab design
Simplified analysis for the transversal load distribution

3. PRESTRESSED CONCRETE STRUCTURES
History, development and general principles of prestressed concrete structures
Prestressing technologies (bonded and unbounded tendons, pre-tensioning and post-tensioning systems)
Codes
Determination of the internal forces
Flexure and shear
Loss of prestress
End anchorages and local verifications

4. THE CALCULATION OF THE PRESTRESSED CONCRETE BEAMS
The loads
The stages of loading
Dimensioning and verification of the prestressed concrete beams

5. COMPOSITE STRUCTURES
General principles
The stud-bolt connectors
Non-linear phenomena (creep, concrete shrinkage, construction stages, ...)

6. THE CALCULATION OF THE PRESTRESSED CONCRETE BEAMS
The loads
Codes
The stages of loading
Dimensioning of the composite beams
Strength verifications (flexure and shear)
Buckling verifications
Web local buckling issues
Fatigue verifications

7. BEARING DEVICES AND DECK JOINTS
The bearing layout
Reinforced elastomeric bearings
Seismic devices
Joint typologies

8. THE SUBSTRUCTURES
The piers
The abutments


(If time permits:
9. LOADING TESTS
Test setup
Deflection measurements)

Readings/Bibliography

All the textbooks indicated below constitute in-depth readings of what will be explained during the lectures.
The teacher himself will indicate the specific chapters of the specific textbooks where to find the best explanations of each topic.

 

TEXTBOOKS ON BRIDGE DESIGN
- G. Albenga, I ponti, Voll. I e II, Ed. UTET, Torino, 1953
- E. Siviero, Il progetto del ponte, Ed. Coll. Ingg. Prov. Padova, Padova, 1994
- M.P. Petrangeli, Progettazione e costruzione di ponti, IV ed., Ed. Masson, Milano, 1997
- F.Martinez, Ponti e viadotti: concezione, progetto, analisi, gestione, Ed. Pitagora, Bologna, 2000
- Autori vari, Nuovi orientamenti per la progettazione di ponti e viadotti, Ed. Dario Flaccovio, Palermo, 2005

 

TEXTBOOKS ON PRESTRESSED REINFORCED CONCRETE STRUCTURES
- C. Cestelli Guidi, Cemento armato precompresso, Ed. Hoepli, Milano, 1987
- F. Leonhardt, C.a. e c.a.p. Calcolo di progetto e tecniche costruttive. I ponti, Ed. Tecniche Milano, Milano, 1979
- T.Y. Lin, N.H. Burns, “Design of prestressed concrete structures", Wiley, 1982
- R. Walther, M.Miehlbradt, "Progettare in calcestruzzo armato", Hoepli, 1990
- L. Santarella, "Il cemento armato", 22a ediz., Hoepli, 1998
- L. Goffi, P. Marro, "Appunti sul Cemento armato precompresso", CLUT editrice, Torino, 1998

 

GENERAL TEXTBOOKS ON STRUCTURAL DESIGN
- O. Belluzzi, Scienza delle costruzioni, Vol. II, Ed. Zanichelli, Bologna, 1966
- P. Pozzati, Teoria e tecnica delle strutture, Vol. I (1972) e Vol. II (1977) Ed. UTET, Torino
- Autori vari, Manuale di Ingegneria Civile, Volume II, Ed. Zanichelli/ ESAC, Bologna, 1991

Teaching methods

Frontal lessons mainly at the blackboard (occasional use of Power-Point slides).
Numerical applicative examples at the blackboard.
Revision of the individidual design projects developed by the students with the help of a tutor.

Assessment methods

Each student will have to develop either alone, or in collaboration with another student or at most two other students, a design project of a girder bridge, complete with calculation report, executive technical drawings and selected construction details.

First, the assessment will consist of evaluating the design of a girder bridge developed by the student. It will consist in:

1. examination of the technical drawings
2. analysis of the technical report
3. calculation and design criteria and technical drawings of the construction details

Second, the oral exam, in the form of a discussion of the project, carried out at the same time as the BRIDGE DESIGN M exam, is aimed at checking if the student is able to apply the theoretical aspects in a specific applicative example of bridge design.

Regarding learning assessments, the use of AI is
prohibited. Any use constitutes a violation of academic integrity.

Teaching tools

Possible lecture-notes supplied by the teacher.
Power-Point presentations.
Examples of projects developed by students from past years.

Students with Disabilities and/or Learning Disorders: anyone wishing to request adaptations should contact the Office Service for Students with Disabilities and SLD, which is responsible for collecting the documentation and determining which adaptations are acceptable.

Services for Equity, Inclusion and Diversity: University Help-Desk against Gender-Based Violence, Alias Career, LGBTQIA + Anti-Discrimination Desk, Services to support in difficult times.

Links to further information

http://www.unibo.it/docenti/stefano.silvestri

Office hours

See the website of Stefano Silvestri