Les structures en treillis, en poutre, en dalles et en cadre sont essentielles pour une grande partie des constructions modernes : immeubles pour l'habitation ou de bureaux, halles et usines, ponts, ou passerelles, voies de transport de l'énergie ou des télécommunications, stades et grandes toitures. Le cours L'Art des Structures 2 vous propose d'en découvrir le fonctionnement et les bases de leur dimensionnement. Sur la base de la statique graphique, une discipline plus que centenaire qui allie rigueur et compréhension globale du fonctionnement, tout en limitant au maximum les aspects mathématiques, les efforts dans les structures sont déterminés, ce qui permet d'en choisir les dimensions. Après avoir suivi ce cours, vous serez en mesure d'identifier les structures en treillis, en poutres, en dalles et en cadre, ainsi que leurs déclinaisons en trois dimensions. Vous saurez comment déterminer les efforts qui agissent dans ces structures et de les prédimensionner. Vous serez à même de faire des propositions pour la réalisation d'une structure utilisant ces diverses formes et de comparer l'efficacité des diverses solutions possibles.
1001 Présentation du cours
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Do curso por École Polytechnique Fédérale de Lausanne
L'Art des Structures 2 : treillis, poutres, dalles et cadres
8 classificações
École Polytechnique Fédérale de Lausanne
8 classificações
Na lição
Introduction aux treillis et forces aux appuis
Bienvenue dans l'Art des Structures 2. Prenez le temps de bien comprendre les bases présentées dans cette leçon, qui seront utilisées fréquemment dans la suite du cours. Si nécessaire, n'hésitez pas à faire appel au cours l'Art des Structures 1.
Conheça os instrutores
Olivier L. BurdetDr
Laboratoire de Construction en Béton
Hello,
I welcome you in the course The Art of Structures II
which is offered by EPFL in Lausanne, Switzerland.
This course is based on the book:
The Art of Structures by the professor Aurelio Muttoni.
As its name implies, this course is the second part
and it is preceded by the course : The Art of Structures I
Along this lecture, I am going to give you some ideas
about what we mean by a structure,
I will show you the path of structures
which is the program that we follow for this course,
I will precise the content of the course The Art of Structures II
and the course's supports which which will be available to you.
I will insist on the necessary prerequisites,
as well as the material that you must have
to be able to properly follow this course and successfully solve the exercises.
Finally, I will give you some indications
about the way this course will be graded,
so that you can get a certificate at the end of the course.
The path of structures that you can see here
is really the table of contents of the book <i>The Art of Structures</i>.
It stretches from the left to the right over ten chapters.
The part which is on the left, here,
deals with the material of the course : The Art of Structures I,
while the part which is on the right,
deals with the material of the course : The Art of Structures II.
This is the one I am introducing to you now.
The course The Art of Structures I is a mandatory prerequisite
to be able to follow the course The Art of Structures II.
In this course, we are studying equilibrium,
we understand how structures work,
what loads act on them,
what internal forces are induced within the structures by applied loads.
We learn how to analyse their behavior,
but also how to design new structures.
The first course also includes an introduction to know how to dimension,
that is to say to choose the dimensions
according to the material the structure will be built with.
The course The Art of Structures I looks at cables structures,
such as the one we can see here in this roof, and also here in the Golden Gate bridge ;
it looks at membrane structures,
such as this public place cover,
in which there are elements in tension ;
it looks at arch-shaped structures, such as these arches of the "Pont du Gard",
or this arch bridge by the Swiss engineer Robert Maillard.
There is a type of structures which is not represented here
which is called an arch-cable that we also introduce
in the first course.
The arch-cable is simply
the combination of an arch and a cable within a structure.
You have here the content of the course The Art of Structures II.
We will start to deal with truss structures,
then we will study beam structures,
and finally frame structures.
In every lecture,
we will first study the aspect of two-dimensional structures,
then we will study the aspect of three-dimensional structures.
It will enable us to introduce some types of derived structures
or else, a bit more important,
as the one of slabs within the framework of the lecture dealing with beams.
Finally,
the last lecture will be devoted to the stability of elements in compression
which is not a type of structures, but which is an important phenomenon
to design and dimension structural elements
subjected to compression.
This is a repetition, but The Art of Structures I
is the foundation of the tower that we are building here.
If you do not have the proper basics from this course,
it is unlikely that you can build
in a stable manner the course The Art of Structures II.
So, one more time, I encourage you, if your notions are uncertain
or if you did not follow it yet, to follow the course The Art of Structures I.
The course The Art of Structures II has numerous course supports.
The first one is the one you are watching now :
the videos which are available on-line.
These videos go along with PDF supports
which I strongly recommend you
to print and to have with you when you follow the videos.
These supports are not complete
and require that you add yourself
the graphical constructions, as well as the remarks,
that I make myself in the videos.
It will enable you
to have reliable notes to, thereafter, work on the exercises.
The exercises will take place on the website i-structures
which is an e-learning website that exists since several years,
on which you will also find
informations in HTML about the diverse subjects of this course.
Finally, but I have already mentioned it in the introduction,
you will also be able to call on the book The Art of Structures
by the professor Muttoni,
which exists in French, in English and in Italian.
It is not absolutely mandatory to use it,
but I encourage you to purchase it
or to borrow it for the duration of the course.
The necessary material, in addition to a computer
-- since you are already using one, I think you have access to it --
will be drawing material, so some paper or a notebook,
pencils and blue and red colored pencils,
as well as a rubber and a calculator.
About computers,
I have to say that most of the tablets or mobile phones
that we can find nowadays cannot execute the Java applets
which are frequently used within the framework of the exercises.
So, for this part of the exercises, you will need to have access
to a computer which can execute Java applications,
that means a desktop computer
or a laptop.
Most of the time, it is possible.
As already mentioned, you will also have to print the course supports,
even though it is also thinkable
to use the annotation function for PDF files.
Finally, I am going to give you some informations
about the exercises and the grading.
The exercises, for which you will have a link from Coursera,
will take place on the i-structures website of EPFL.
You will just need to insert
your Coursera login and password
and you will reach it automatically.
Please respect the time limits to do the exercises.
Generally, they must be done within a one-week period.
Each completed exercise will be corrected and graded between 0 and 100.
The conditions for success, that is to say the average grade
for all the exersises of the course, are indicated on Coursera.
For those who will obtain the best results,
they will have the possibility,
if their average grade reaches a certain level,
to get a certificate with a distinction.
I thank you for your attention,
I wish you a happy discovery of this course :
The Art of Structures II, and I encourage you
to start as soon as possible to study the lectures
which are related to truss structures.
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