Giornata di studio in onore di Marcello Ciampoli, Facolta' di Ingegneria Civile e Industriale, Universita' degli Studi di Roma La Sapienza, 9 dicembre 2014.

1. Concetti e metodi del Performance-
Based Wind Engineering
(PBWE)
Francesco Petrini
Structural Engineer, Ph.D., P.E.
--
School of Civil and Industrial Engineering, Sapienza Università di Roma
Co-founder and Director,
StroNGER S.r.l.,
--
e-mail: francesco.petrini@uniroma1.it
francesco.petrini@stronger2012.com
09 December 2014
Giornata di studio in onore di Marcello Ciampoli
Facoltà di Ingegneria, Aula del Chiostro
Via Eudossiana, 18; ROMA

2. Why I am speaking about
Marcello Ciampoli today
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

3. Overview of my career development (2005-2014)
Post-Doc Research Associate
Publ
2005 2006 2007 2009 2010
Spin-off
company
2011 201IA2BMAS’11
2013
(Italy) – SS Chair
Oct 2004
Publ
Oct 2007
Mar 2006
Nov 2008
PG PhD Student
Assistant
Mar 2009
Apr 2009
Jul 2009
Aug 2009
MSc degree (laurea)
Aerodynamics and Aeroelasticity
Jan 2007
Jan 2009
P.E.
Mar 2005
Nov 2005
Jan 2005
Jan2006
Jun 2007
Jan 2008
(Sapienza University of Rome)
Jun 2005
PBD for Wind Mar 2012
Mar 2011
Associate Researcher
Energy Harvesting
PBD for Wind, Earthquake, Fire, Blast
Resilience
May 2011
ICASP’11
(Swizerland) – MS Chair
Jun 2011
Jan 2011
Ago 2011
Apr 2012
Jan 2013
PMC’12 (USA) – SS Chair
Jan 2012
ASCE E&S ’10 (USA)
PhD degree
Jan 2010
Mar 2010
Aug 2010
(Sapienza
University
of Rome)
(Sapienza University of Rome)
2008
Jun 2013
Jan 2014
ICOSSAR 2013
(USA) – MS Chair
Guest Editor
Spin-off company

4. Overview of my career development (2005-2014)
Post-Doc Research Associate
Publ
2005 2006 2007 2009 2010
Spin-off
company
2011 201IA2BMAS’11
2013
(Italy) – SS Chair
Oct 2004
Publ
Oct 2007
Mar 2006
Nov 2008
PG PhD Student
Assistant
Mar 2009
Apr 2009
Jul 2009
Aug 2009
MSc degree (laurea)
Aerodynamics and Aeroelasticity
Jan 2007
Jan 2009
P.E.
Mar 2005
Nov 2005
Jan 2005
Jan2006
Jun 2007
Jan 2008
(Sapienza University of Rome)
Jun 2005
PBD for Wind Mar 2012
Mar 2011
Associate Researcher
Energy Harvesting
PBD for Wind, Earthquake, Fire, Blast
Resilience
May 2011
ICASP’11
(Swizerland) – MS Chair
Jun 2011
Jan 2011
Ago 2011
Apr 2012
Jan 2013
PMC’12 (USA) – SS Chair
Jan 2012
ASCE E&S ’10 (USA)
PhD degree
Jan 2010
Mar 2010
Aug 2010
(Sapienza
University
of Rome)
(Sapienza University of Rome)
2008
Jun 2013
Jan 2014
ICOSSAR 2013
(USA) – MS Chair
Guest Editor
Spin-off company
MARCELLO

5. Marcello’s influence in my career development (2005-2014)
Post-Doc Research Associate
Publ
(Sapienza University of Rome)
2005 2006 2007 2009 2010
Spin-off
company
2011 2012 2013
Oct 2004
Publ
Oct 2007
Mar 2006
Nov 2008
PG PhD Student
Assistant
Mar 2009
Apr 2009
Jul 2009
Aug 2009
MSc degree (laurea)
Aerodynamics and Aeroelasticity
Jan 2007
Jan 2009
P.E.
Mar 2005
Nov 2005
Jan 2005
Jan2006
Jun 2007
Jan 2008
Jun 2005
PBD for Wind Mar 2012
Mar 2011
Associate Researcher
Energy Harvesting
PBD for Wind, Earthquake, Fire, Blast
Resilience
May 2011
Jun 2011
Jan 2011
Ago 2011
Apr 2012
Jan 2013
Jan 2012
ASCE E&S ’10 (USA)
PhD degree
Jan 2010
Mar 2010
Aug 2010
(Sapienza
University
of Rome)
(Sapienza University of Rome)
2008
Jun 2013
Jan 2014
ICOSSAR 2013
(USA) – MS Chair
Guest Editor
Spin-off company
IABMAS’11
(Italy) – SS Chair
ICASP’11
(Swizerland) – MS Chair
PMC’12 (USA) – SS Chair
MARCELLO

6. Performance-Based Wind Engineering
(PBWE)
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

7. Intensity
measure IM SP IP
Environme
nt info
O
f(IM|O)
f(IM)
f(IP|IM,SP)
f(IP)
f(EDP|IM,IP,SP)
G(EDP)
f(DM|EDP)
G(DM)
f(DV|DM)
G(DV)
Hazard analysis
Interaction
analysis
Structural analysis Damage analysis Loss analysis
IM: intensity
measure
*
IP: interaction
parameters
EDP: engineering
demand param.
DM: damage
measure
DV: decision
variable
Select
O, D
O: location
D: design
Decision-making
D
SP: structural
system parameters
f(SP)
* f(SP|D)
*
Structural
characterization
Structural
system
info
PBWE- Framework
G(DV) = ∫…∫ G(DV|DM) · f(DM|EDP) · f(EDP|IM, IP, SP) · f(IP|IM,SP) ·
· f(IM) · f(SP) · dDM · dEDP · dIP · dIM · dSP
Interaction
Parameters
Structural
Parameters
Engineering
Demand
Parameters
EDP
procedure proposed by
PEER Research center
Damage
Measure DM
Extension of the
Performance-Based
Seismic Design
Decision
Variable DV
G(·|·) is a conditional
complementary
cumulative distribution
function
f(·|·) is a conditional
probability density
= progress with respect to the function
Performance-Based Seismic Design
Ciampoli M., Petrini F., Augusti G., (2011). “Performance-Based Wind Engineering: towards a general procedure”,
Structural Safety, 33 (6), 367-378
PBWE – The framework
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

8. Performance-Based Wind Engineering (PBWE)-
Uncertainties propagation
PBWE – The concept
ENVIRONMENT
EXCHANGE ZONE
Aerodynamic and
aeroelastic
Wind site phenomena
basic
parameters
Wind
action
STRUCTURAL SYSTEM
Structural
systems
Non
environmental
actions
Site-specific
Wind
Environmental
effects (e.g.
waves)
Structural
system as modified
by service loads
Vm
ENVIRONMENT EXCHANGE ZONE
Mean wind velocity profile
Vm+ v(t)
Turbulent wind velocity profile
river
Petrini F.(2009). “A probabilistic approach to Performance-Based Wind Engineering”, Ph.D. dissertation, department of
Structural and Geotechnical Engineering, Sapienza University of Rome, Rome, Italy
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

9. Performance-Based Wind Engineering (PBWE)-
Uncertainties propagation
Types of uncertainties
ENVIRONMENT
Wind
action
STRUCTURAL SYSTEM
Structural
systems
Non
environmental
actions
EXCHANGE ZONE
1. Aleatory
2. Epistemic
3. Model
Interaction
parameters
Structural parameters
Site-specific
Wind
Aerodynamic and
aeroelastic
Wind site phenomena
basic
parameters
Intensity measure
1. Aleatory
2. Epistemic
3. Model
1. Aleatory
2. Epistemic
3. Model
Environmental
effects (e.g.
waves)
Structural
system as modified
by service loads
(IM ) (IP) (SP )
P(IM, IP,SP) = P(IPIM,SP)×P(IM)×P(SP)
Petrini, F. & Ciampoli M., 2012, Performance-based wind design of tall buildings, Structure & Infrastructure
Engineering, 8(10), 954-966.
PBWE – The concept
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

10. PBWE
Applications
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

11. PBWE-Application on a long span suspension bridge
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Performance Evaluation (EDP=Vertical acceleration)
P(Av > av*|Vm(zdeck))
Vm(zdeck) [m/s]
0 5 10 15 20 25 30 35
Fragility curves P(EDP|IM)
Ciampoli M., Petrini F., Augusti G., (2011). “Performance-Based Wind Engineering: towards a general procedure”,
Structural Safety, 33 (6), 367-378
Failure probability G (EDP)
Vento = f(s,t)
Vento = f(s,t)
EDPs
0.07
1.1
Different
threshold
values
PBWE – The first application
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

12. PBWE-Application on an High-rise building
Improvement of the occupant comfort by a TMD
Vm (z3)
V(t;z2)
w(t;z2) Vm(z2)
Vm (z1)
v(t;z2u(t;z ) 2)
X
θ
B1
p TMD
aL
B2
H
p
EDP = peak across-wind acceleration at the top floor ( a ) L
TMD Design Parameters
Z
Y
γ = mTMD/mtot ξ* = damping of TMD β = ωTMD/ ω1
Parametric analysis
p [mm/s2]
aL
γ = 1/150
90
0.125 0.145 0.165 0.185
n [Hz]
β = 0.70 ; ξ* = 1% - 10% β β = = 0.80 ; ξ* =
= 1% - 10%
β = 0.90 ; ξ* = 1% - 10% β β = = 1.02 ; ξ* =
= 1% - 10%
β = 1.10 ; ξ* = 1% - 10% β β = = 1.20 ; ξ* =
= 1% - 10%
β = 1.30 ; ξ* = 1% - 10% Uncontrolled
Apartment Office
Effects on risk
β = =
β = =
β = ξ* =
=
Ciampoli M, Petrini F. (2011). “Performance-Based Aeolian Risk assessment and reduction for tall buildings”,
Probabilistic Engineering Mechanics, 28, 75–84.
PBWE – The advanced application
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

13. PBWE-Application on an Offshore Wind Turbine
x,x’
w (t) P
z’
y’
Waves
Current
P
v (t) P
u (t) P
Turbulent
wind
P
Mean
wind
Vm(zP)
z
y
H
h
vw(z’)
Vcur(z’)
d
Terrain
Performance evaluation
Across wind direction
1°
rp
EDP = peak displacement
at the hub (rp)
G [EDP]
The structural response is
obtained by analyses in the
frequency domain, while the
statistical characterization of
the response is obtained using
Monte Carlo simulation
EDP [m]
Ciampoli M., Petrini F. (2010). Performance-Based Design of Offshore Wind Turbines, 2th biennial ASCE Aerospace
Division International Conference (Earth & Space 2010), Honolulu, USA, 14 – 17 March 2010. ISBN 978-0-7844-1096-7
PBWE – The evolution
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

14. What’s Next?
Marcello’s influence to my actual work
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

15. PBE- in a Multi-Hazard environment
Marcello’s influence to my actual work
O
f(IM|O)
f(IM)
f(IP|IM,SP)
info Decision-making
f(IP)
f(EDP|IM,IP,SP)
G(EDP)
f(DM|EDP)
G(DM)
f(DV|DM)
G(DV)
Hazard analysis
(Considering
concurrence
between hazards) Interaction
analysis
Structural analysis Damage
analysis
Loss analysis
IM: intensity
measures
IP: interaction
parameters
EDP: engineering
demand parameters
DM: damage
measures
DV: decision
variables
Select
O, De
Environment
O: location
De: design
De
SP: structural
parameters
f(SP)
f(SP|De)
Structural
characterization
Structural
system
info
De(DM)
In case of hazards chain
ENVIRONMENT
EXCHANGE ZONE
Hurricane
action
STRUCTURAL SYSTEM
Original
structure
Non
environmental
actions
Structure-
Environment
Interaction
Wind
(Aeolian hazard)
Water bodies
(Flood hazard)
Modified
structural
Sources of system
windborne debris
(Windborne
debris hazard)
Rain
(Rainfall hazard)
W
F
D
RA
IM S
A
IP SP
= It results = Interaction
Site-specific
Hazard
= Uncertainty propagation
Developed in collaboration with:
W, F, D, RA = Intensity Measure vectors for individual hazards, Michele Barbato, Louisiana State University
S, A = vector of stochastic parameters describing the structural system

16. Guest Editor for a special issue on PBE
Marcello’s influence to my actual work
Michele Barbato
Associate Professor
Louisiana State University and
A&M College
Baton Rouge, LA 70803, USA
mbarbato@lsu.edu
Alessandro Palmeri
Senior Lecturer
Loughborough University
Sir Frank Gibb Building,
Loughborough LE11 3TU, UK
A.Palmeri@lboro.ac.uk
Francesco Petrini
Associate Researcher
Sapienza Università di Roma
Via Eudossiana 18
00184 Rome, ITALY
francesco.petrini@uniroma1.it
33 contribution have been presented
Guest Editor
Special Issue of Engineering Structures (Elsevier) on:
Performance-Based Engineering
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

17. Marcello taught me
how to write a good paper ….
… and he did it in a very “soft” way
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

18. Bullshits VS Brilliant things
He taught me how to write a good paper
Ciampoli M., Petrini F., Augusti G., (2011). “Performance-Based Wind Engineering: towards a general procedure”,
Structural Safety, 33 (6), 367-378
Ricevemmo una review “non proprio” positiva
The Reviewer was not so happy about the manuscript
Io: “Professore, e adesso cosa facciamo?” ;
“Professor, how can we arrange this?
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

19. Bullshits VS Brilliant things
Ciampoli M., Petrini F., Augusti G., (2011). “Performance-Based Wind Engineering: towards a general procedure”,
Structural Safety, 33 (6), 367-378
Ricevemmo una review “non proprio” positiva
The Reviewer was not so happy about the manuscript
Io: “Professore, e adesso cosa facciamo?” ;
“Professor, how can we arrange this?
Marcello: “è semplice: le stronzate dell’articolo le hai scritte tutte tu, e
le cose intelligenti io, quindi lascia fare me, che tu meno fai e meglio è”;
“it is very simple: the bullshits in the paper are all from
your side, the brilliant parts are from my side… so: leave it
to me please”
He taught me how to write a good paper
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

20. Fatal combination of circumstances!
Ciampoli M., Petrini F. (2010). Performance-Based Design of Offshore Wind Turbines, 2th biennial ASCE Aerospace Division International
Conference (Earth & Space 2010), Honolulu, USA, 14 – 17 March 2010. ISBN 978-0-7844-1096-7
... 15 Marzo 2010, Eravamo alle Hawaii per un convegno, lui era uscito dalla sala e si era
infilato in un bellissimo negozio, io lo avevo seguito……….
…. March 15°, 2010. We were in Hawaii Islands for a Conference, He Escape
from the conference hall and entered in a wonderful shop. I was with him ….
Io: “Professore, domani abbiamo la presentazione, non è meglio che
ci prepariamo?” ;
“Professor, we will present our work tomorrow, maybe is
better if we go back for preparing it”
Credit card!
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

21. Fatal combination of circumstances!
Ciampoli M., Petrini F. (2010). Performance-Based Design of Offshore Wind Turbines, 2th biennial ASCE Aerospace Division International
Conference (Earth & Space 2010), Honolulu, USA, 14 – 17 March 2010. ISBN 978-0-7844-1096-7
... 15 Marzo 2010, Eravamo alle Hawaii per un convegno, lui era uscito dalla sala e si era
infilato in un bellissimo negozio, io lo avevo seguito……….
…. March 15°, 2010. We were in Hawaii Islands for a Conference, He Escape
from the conference hall and entered in a wonderful shop. I was with him ….
Io: “Professore, domani abbiamo la presentazione, non è meglio che
ci prepariamo?” ;
“Professor, we will present our work tomorrow, maybe is
better if we go back for preparing it”
Marcello: “senti: siamo alle Hawaii, è il giorno del mio compleanno, e
la mia carta di credito è piena….questa è una terribile combinazione di
eventi!”
” listen me: we are in Hawaii Islands, today is my birthday,
and my credit card is full …. Thi is a fatal combination of
circumstances!. ”
Credit card!
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

22. What is your research topic?
Petrini F., Ciampoli M., (2012). “Performance-based wind design of tall buildings”, Structure & Infrastructure Engineering - Maintenance,
Management, Life-Cycle Design & Performance, 8 (10), 954-966. DOI: 10.1080/15732479.2011.574815
... Eravamo nella sua stanza a lavorare al paper. Entra in ufficio una professoressa molto
bella e vestita benissimo, per chiedergli delle cose. Dopo che se ne era andata...
…. We was warking on the paper in his room. At a certain point entered a very
beautiful women (that is professor in our department) in the office, asking for something ….
Io: “Professore, qual’è il topic di ricerca della professoressa -----?” ;
“Marcello, what is the research topic of professor -----?”
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

23. What is your research topic?
Petrini F., Ciampoli M., (2012). “Performance-based wind design of tall buildings”, Structure & Infrastructure Engineering - Maintenance,
Management, Life-Cycle Design & Performance, 8 (10), 954-966. DOI: 10.1080/15732479.2011.574815
... Eravamo nella sua stanza a lavorare al paper. Entra in ufficio una professoressa
BELLISSIMA e vestita benissimo, per chiedergli delle cose. Dopo che se ne era andata...
…. We was warking on the paper in his room. At a certain point entered a very
beautiful women (that is professor in our department) in the office, asking for something ….
Io: “Professore, qual’è il topic di ricerca della professoressa -----?” ;
“Marcello, what is the research topic of professor -----?”
Marcello: “VECCHIO PORCOi!”
” You are a PIG! ”
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

24. Mentale Vs Fisico
Ciampoli M, Petrini F. (2011). “Performance-Based Aeolian Risk assessment and reduction for tall buildings”,
Probabilistic Engineering Mechanics, 28, 75–84.
... Avevo inviato di Venerdi a Marcello una prima bozza del paper, per farglielo leggere il
week-end……. Al lunedi gli busso in ufficio……….
…. I had prepared a very first draft of the paper, in order to allow him to read
the draft during the week-end…. The successive Monday in his hoffice….
Io: “Professore: ha letto la bozza del paper che le ho mandato?”
“Did you read the draft of the paper?
Marcello: “Ma certo!”;
“yes of course!”
Io: “Bè? Che ne pensa?”
“And what is your feeling about it?
He taught me many things, the importance of not taking myself too seriously
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

25. Mentale Vs Fisico
Ciampoli M, Petrini F. (2011). “Performance-Based Aeolian Risk assessment and reduction for tall buildings”,
Probabilistic Engineering Mechanics, 28, 75–84.
... Avevo inviato di Venerdi a Marcello una prima bozza del paper, per farglielo leggere il
week-end……. Al lunedi gli busso in ufficio……….
…. I had prepared a very first draft of the paper, in order to allow him to read
the draft during the week-end…. The successive Monday in his hoffice….
Io: “Professore: ha letto la bozza del paper che le ho mandato?”
“Did you read the draft of the paper?
Marcello: “Ma certo!”;
“yes of course!”
Io: “Bè? Che ne pensa?”
“And what is your feeling about it?
Marcello: “Guarda: sono arrivato a leggere fino a pag. 2, poi ero
talmente stufo di masturbarmi mentalmente per capire cosa volevi dire
col tuo inglese, che ho preferito andare in bagno e farlo fisicamente…”
” ……. ” I AM NOT ABLE TO TRANSLATE IT IN ENGLISH!
He taught me many things, the importance of not taking myself too seriously
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

26. Era terribile andare in giro con lui
He was terrible!
... Era capace di attaccare discorso con tutti! ……….
…. He was able to start a conversation with anyone….
NOT Marcello Marcello Marcello

27. I am not still angry……
My regret
... Durante l’ultimo periodo, Marcello era un pò arrabbiato con me … ancora oggi non ne conosco il vero
motivo. Lo avevo invitato piu volte a prendere un caffè insieme, per capire. Ma lui aveva (molto signorilmente)
declinato. Alla fine avevo deciso di non insistere, e di aspettare il tempo di cui aveva bisogno per perdonarmi e
spiegarmi…… ma purtroppo questo tempo non ce lo abbiamo avuto.
Anche io mi ero arrabbiato con lui! Ma voglio dirgli che ora non lo sono più!
During the last period, I realized that he was little bit
angry with me. I never understood the motivation
and he did not explain me. I tried to take a coffee
with him in order to speak about it, but he declined
(always in a very polite way). I finally decided to not
make pressure on him and to allow him to
take his time. But, unfortunately this time was not
allowed. I was also angry with him!
But I would like to say that I am not still angry
with him NOW!
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini

28. …. now I am grateful
Acknowledgments
Un caro ringraziamento a MARCELLO CIAMPOLI,
che mi ha insegnato veramente tanto sulla ricerca ma che, soprattutto,
mi ha insegnato che non bisogna mai prendersi troppo sul serio.
I would like to give my acnowledgments to Marcello Ciampoli He taught me
many things regarding the scientific research, but the most valuable of
these is the importance of not taking myself too seriously
Francesco Petrini
(09/12/2014)
Giornata per Marcello, Roma 09 Dec 2014 Francesco Petrini