# 1. Concept of structural safety and reliability

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ANALYSIS AND DESIGN OF REINFORCED AND PRESTRESSED CONCRETE STRUCTURE
S

(EA)

prof. ing. Oreste S. Bursi

The course provides fundamental knowledge
s

to allow to the future architect
-
engineer a
general background on the most recurrent design problems. During
the tutorials a structural
design project of a civil building or of a double
-
curvature two
-
dimensional structure will be
developed. In this manner, it will provide the necessary skills to understand practical
applications.

For its application matter and th
e reference to other teachings notions, the course requires the
knowledge of the subject treated during the courses of "Statics", "
Structural Analysis and
Design
" and "Geotec
h
ni
cal Engineering
"
.

Program

1.
Concept of
structural
safety and reliability

Rec
alls to the semi
-
probabilistic methods
and deterministic evaluation of the loads on
buildings
.

2.
Multi
-
storey
reinforced concrete
building
s

Recurrent structural typologies. The pseudo
-
spatial structural system. Plane systems.
Classification of plane syst
ems.
Analysis t
ypes and methods
for

frame systems. The forces
method. The displacement method. The
i
nfluence lines and their application to frame
structure
s
. Simplification procedures for
internal
forces

evaluation.

3.
Second order effects

Buckling of RC
columns. Overall case for frame structure. Approximated method
s
. Laws in
force.

4.
Effects of seismic actions

Analysis of structural system. Effects of design seismic actions. Safety verifications
i
n
according to the
codes
.

5.
Force introduction areas an
d concrete hinges

Load introduction and concentrated forces. Design of concrete hinges.

ANALYSIS AND DESIGN OF REINFORCED AND PRESTRESSED CONCRETE STRUCTURE
S

(EA)

prof. ing. Oreste S. Bursi

6.
Non
-
linear c
omputation
, recalls and extensions
to

the limit
state
s

design concept

The concept of plastic hinge, the static theorem, the kinematic theorem, the uniqueness
theorem.
The fracture
calculation

and the ultimate load for frame structures. The cracking and
def
lection

limit states, the ultimate limit states
(axial
, shear and punching, loss of
equilibrium, mechanism formation). Slender and squat concrete elements.

7.
Design, calcu
lation
, verification and construction details of recurrent building elements

Horizontal elements (beam
s

and floor
s
,
cast and
with
global or partial pre
-
casting
. Vertical
elements (columns, stairs and lift shafts, walls, beam
-
walls, retaining walls), stairs. Foundation
constructive elements (plinth
s
,
reversed beams,
gri
d
s,
mat
s). Casting
procedures
,
formwork
loosen
ing
,
constructi
on phases.

8.
R
einforced and prestressed concrete

structures
under
biaxial

Slab analysis methods, plates, shells and vaults, positive and negative double
-
curvature
structures. Design and verification of shells and vaults. Design of reinforcing bar
s according to
the local stress
condition
. Punching.

9.
Fire resistance of structures

Structure design for fire resistance, notes about fire design problems, prevention and
protection, active and passive protection
.

ANALYSIS AND DESIGN OF REINFORCED AND
PRESTRESSED CONCRETE STRUCTURE
S

(EA)

prof. ing. Oreste S. Bursi

Tutorial
s

During the tutorials the project will be developed in according to the actual codes, with explicit
reference to the semi
-
probabilistic limit states. Moreover, the basis for a compl
ete design of a
multi
-
storey reinforced concrete civil building is given. Alternatively, the student can design a
positive or negative double
-
curvature two
-
dimensional structure.

In particular, during the tutorials, the following design topics will be trea
ted:

-

structural scheme choice;

-

-

preliminary design;

-

structural analysis with simplified schemes for bearing elements design;

-

limit states (S.L.S., U.L.S.);

-

construction drawings and design calculations.

Examination
procedures:

Th
e exam is made of an oral exam
ination
, even based on the discussion of the
practical
application developed
during the course
.

Suggested textbooks:

T. Antonini,
Cemento armato precompresso,
Vol. 1, Masson, 1986

Caironi M, Gambarova P. e Tattoni S.,
Teoria

e tecnica delle costruzioni,
Paravia Torino

R.J. Cope e L.A. Clark,
Concrete Slabs: Analysis and Design

A. Defez,
Il Consolidamento degli Edifici
, Liguori, 1998

Donaggio E.,
Manuale del calcestruzzo armato: materiali e teorie di dimensionamento,

Zanichell
i, Bologna

Leonhardt F.,
C.a. e C.a.p. Calcolo di progetto e tecniche costruttive
, Edizioni Tecniche
Internazionali

Massonet C.H., Save M.,
Calcolo plastico a rottura delle costruzioni,

CLUP, Milano

Migliacci A.,
Progetti di strutture
, Masson Italia Editor
e

Migliacci A., Mola F.,
Progetto agli stati limite delle strutture in C.A.,

Masson Italia

G.G. Penelis and A.J. Kappos
, Earthquake
-
resistant concrete structures,
SPON, 1997.

Pozzati P.,
Teoria e tecnica delle strutture
, UTET

S. Timoshenko,
Theory of plate
s and shells

Toniolo G.,
Calcolo strutturale
-

I telai
, Vol.
I, Masson Milano

Toniolo G.,
Elementi strutturali in cemento armato
, Vol.
II, Masson Milano

F.K. Kong et al.
Handbook of Structural Concrete: Shell Roofs

Eurocodice N. 2.
Progettazione delle Stru
tture Cementizie. Parte 1
-
3: Elementi e Strutture
Prefabbricate in Calcestruzzo

Eurocode N. 8.
Design Provisions for Earthquake Resistance of Structures. Annex B
-

Seismic Design of Precast Concrete Structures

Eurocode N. 8.
Design Provisions for Earthqua
ke Resistance of Structures. Part 1
-
1
-
3
-

Specific Rules for Masonry Buildings