Bernard LE TALLEC
Director - Institut Supérieur du Bâtiment et des Travaux Publics
- Marseille (France)
The "Institut Supérieur du Bâtiment et des Travaux Publics"
is a post graduate specialisation school in civil engineering. Founded in 1952,
the Institute was recognised by the French Ministry of Education in 1955. ISBA-TP
has been since October 1976 part of the Chamber of Commerce and Industry of
Marseille Provence, under the supervision authority of the French Ministry for
Industry and the French Ministry for Education.
All students attending the courses have already an Engineering Degree (M.Sc.
level). The training is one year long and it aims at completing the knowledge
acquired in engineering school.
About thirty students are registered each year. Ten to twelve are foreign students
coming from African French speaking States. ISBA-TP delivers an Engineer Diploma
or a Master Diploma in civil engineering.
The curriculum is defined and validated each year by professional experts working in major French companies. It includes :
· advanced courses, taught by professional engineers from leading design
offices (in the industry) such as : advanced rheology, concrete structure design,
steel structure design, mixed structure design, structure calculation including
structural modeling, finite elements, dynamic behaviour, law, human resources
management, contracts, -------> 440 hours,
· self activities such as technical reports, English, -------> 80
hours,
· design courses also taught by professional engineers (engineering design
for bridges, for buildings and for civil engineering structures), ------->
108 hours,
· projects (bridge project, building project, civil engineering structure
project),
· -------> 360 hours,
· an industrial training in a company lasting three months. This training
period takes place in a design office (civil engineering designer), a control
office (control engineer) or on a building site (building engineer) ------->
520 hours.
All the students find a job at the end of the training period in less than three months, in France or abroad. They work mainly in civil engineering offices, designing buildings, bridges or offshore structures...
ISBA-TP has got an insurance quality Certification ISO 9001 by D.N.V. in year
2000.
This article deals with the design courses taught at ISBA-TP (108 hours) and
the design structure projects (360 hours).
The three courses "bridge design", "building design" and "civil engineering design" aim at putting the students knowledge acquired in the above mentioned courses at ISBA-TP to practical use.
Bridge design : this course includes the description of a bridge project different steps, the methods to design bridge parts such as foundations, supports, bearings, deck and superstructures.
The foundations studied are piles, shafts, footings, cofferdams and rafts. The support studied includes piers, T-shaped piers, abutments and all types of bearings (reinforced elastomeric bearing, sliding point bearing and pot bearing).
All types of decks are also studied : ducts, closed frame reinforced concrete bridges, open frame reinforced bridges, reinforced concrete slab bridges, pre-stressed post-tensioned concrete slab bridges, composite girder bridges, pre-stressed post-tensioned concrete (or pre-tensioned) beam bridges, steel beam bridges and rigid frame bridge.
Steel box girder or pre-stressed concrete box girder, built using the cantilever method or incremental launching method, cable stayed bridges, suspension bridges and concrete or steel arc bridges are also studied.
This course ends with carrying out a bridge preliminary study (the students, in threes, have to define the various types of adequate bridges to make the crossing of a breach possible ( five solutions), located on a true infrastructure to be achieved (the bridge is not built yet), including the environmental aspect, the dimensioning of the foundations, the supports and the deck, the study of the constructive systems, the costs and the durability.
Buildings design : this course, the purpose of which is to define the methodologies of studies of a building in statics (load descents), dimensioning of the beams, walls, columns, floors (taking the incidence of pluming, electricity, air-conditioning, ....into account). Methods of dynamic analysis (determination of the centres of inertia) are also taught for the seismic calculation of the building.
Civil engineering structures design : this course will define the methods of dimensioning of civil engineering structures such as the retaining structures of deep excavations, resumption of the hydraulic pressures, the calculation of very high stack ...
When these three design courses are over, three projects will be carried out
by students in threes who will spend nine weeks working on them (three weeks
for each project).
Bridge project :
The solution chosen by the group of three students, at the end of the preliminary study as being the best, will be the object of a complete calculation of structure, during and after the building.
The calculation of the foundations, the supports and bearings are done, as well as the deck calculation, by using preferably manual means of calculation because the design office chief engineers wish the students could understand the functioning of a structure rather than the functioning of a software which does the main part of the work. The learning of a software is simple and does not require either special skill or a lot of time.
The work achieved by the students includes a note about the way work will be carried out, support calculation, bearing calculation, deck calculation during the phase of service and the phase of construction. Some parts of the insurance quality plan is also produced (deck erecting procedure, supply of material booklet).
A technical talk, held in English, lasting one and a half hours, will be given in front of a jury, composed of professionals. The students will be asked questions then.
A list of bridge projects studied this year by the students of ISBA-TP is given below.
A51 Motorway between GRENOBLE and SISTERON (project also studied at the same time at the Ministry of Transport) :
· MARAIZE bridge : pre-stressed concrete box girder bridge, 4 spans
(22m, 29m, 29m, 22m), constant height, using the launching method, founded on
piles seated on the bedrock.
· BEAUJEU bridge : pre-stressed concrete box girder, 3 spans (60m , 43m,
48m), variable height, using the cantilever method, founded on piles sited in
the bedrock.
· SABOUIRAS bridge : composite box girder (concrete and steel), 3 spans
(69m, 86m, 69m), constant height, using the launching method, founded on footings.
· BEYNON bridge : cable stayed bridge, concrete box girder, 2 spans (90m,
90m), constant height, using the cantilever method, founded on footings.
· CHANOUSSES bridge : pre-stressed concrete box girder bridge, 3 spans
(35m, 50m, 35m), constant height, using the launching method, founded on footings.
· AIGUE-BELLE bridge : multi-bowstring, 3spans (92m, 100m, 90m), steel
deck, founded on piles.
· CLARIS bridge : pre-stressed concrete box girder bridge, 4 spans (38m,
59m, 59m, 38m), constant height, using the launching method, founded on piles.
· GRAND BUECH bridge : composite beam (concrete and steel), 4 spans (36m,
60m, 60m, 36m), constant height, using the launching method, founded on piles.
· LAFFITE bridge : composite box girder (concrete and steel), 3 spans
(60m, 95m, 60m), constant height, using the launching method, founded on piles.
Building project :
The students, during this project have to define the dimensions of a building
(office, school or apartment building), have to do the totality of the concrete
structure calculations (foundations, rises) taking into account the seismic
aspect (these buildings are located in seismic zone in the South of France).
A list of buildings projects studied this year by the students of ISBA-TP is
given below (those project are studied in OTH Company at the same time).
· CANNES "ISOLA BELLA" : study of a residential building at
the detailed stage of pre-project. Building on 4 levels. Descent of loads. Study
of the
wind-bracing under seism and reinforced concrete structure calculations.
· MONACO : study of a hospital at the detailed stage of pre-project.
Building on 7 levels + 4 levels of underground car park. Piled foundations.
Descent of loads. Study of the wind-bracing under seism and reinforced concrete
structure calculations.
· CANNES "Le Mistral" : study of a residential building of
high standing at the detailed stage of pre-project . Building on 6 levels. Descent
of loads.
Study of the wind-bracing under seism and reinforced concrete structure calculations.
· MONTPELLIER : study of a residential building at the detailed stage
of pre-project. Building on 4 levels. Piled foundations. Descent of loads. Study
of the wind-bracing under the wind effect, reinforced concrete structure calculations.
· AIX EN PROVENCE : study of a building under seismic efforts at the
execution stage. Mixed structure. Modification of an existing building. Descent
of loads. Study of the wind-bracing under seism and reinforced concrete structure
calculations.
· NICE : study of a building at the execution stage. Building on 7 levels
+
5 levels of underground car park. Foundations on bars and slurry
trench wall. Descent of load. Study of the wind-bracing under the
effect of the wind and reinforced concrete structure calculations.
Civil engineering structure project :
This year, the students, during this project have to design an underground car
park. The geology of the site is known, the capacity of the car park too.
After working on the design, the have to do the calculation of the whole structure
including the retaining system during the erecting period and the hydraulic
aspects.
A list of civil engineering projects studied this year by the students of ISBA-TP
is given below.
· PERPIGNAN car park, town center, 4 levels, under the water level,
· DIJON car park
· CHAMBERY car park
· LYON car park, town center, 2 levels, under the river Rhône level,
· TIGNES car park, 7 levels, circular, in a seismic zone.
· ANNECY car park in a seismic zone.
· GRASSE car park in a seismic zone.
· MENTON car park in a seismic zone.
· BORDEAUX car park