Exposure Factor in a Controlled Demolition_Eng Marco Lucidi

Pubblic Presentation of Freelance Engineer Marco Lucidi in IF CRASC'15 - III CONGRESS ON FORENSICS ENEGINEERING - VI CONGRESS ON COLLAPSES, RELIABILITY AND RETROFIT OF STRUCTURES - Sapienza University of Rome, May 14th-16th , 2015

1. Exposure Factor in a Controlled Demolition
M. Lucidi
Freelance Engineer, Rome
IF CRASC’15
III THIRD CONGRESS ON FORENSIC ENGINEERING
VI CONGRESS ON COLLAPSES, RELIABILITY AND RETROFIT OF STRUCTURES
SAPIENZA UNIVERSITY OF ROME, 14 -16 MAY 2015

2. M. Lucidi
OVERALL VIEW EXPOSURE and ACTIONS on the STRUCTURES
2
“Exposure Factor in a Controlled Demolition”
STRUCTURAL
DAMAGE for
EXPLOSION CAUSE
UNFIT for USE for EVERYONE
TEMPORARY
REINFORCEMENT
UNFIT for HUMAN HABITATION , but NOT for TECHNICIANS
TECHNICAL EXHAUSTIVE STUDY INSPECTION
DEMOLITION PLAN
CONTROLLED
DEMOLITION with
EXPLOSIVE
DEMOLITION FAILURE
HIGH RISK

3. M. Lucidi
STRUCTURAL DAMAGE for EXPLOSION CAUSE
3
“Exposure Factor in a Controlled Demolition”
UNFIT for USE for
EVERYONE
U.S. and Saudi military personnel
survey the damage to Khobar Towers
caused by the explosion of a fuel truck
outside the northern fence of the
facility on King Abdul Aziz Air Base
near Dhahran, Saudi Arabia
Explosion Mariahilfer-Straße Wien
26.04.2014,
part of the roof collapsed and windows
of the building in the capital’s 15th
district were shattered.
T
e
Emergency
Time
EXPOSED : 19 dead +
64 hospitalized + 200
injuries
EXPOSED : 1 dead
+ 5 injuries

4. M. Lucidi
STRUCTURAL DAMAGE for EXPLOSION CAUSE
4
“Exposure Factor in a Controlled Demolition”
UNFIT for USE for
EVERYONE –
EMERGENCY
110 FIREFIGHTERS AN MANY
PARAMADICS AND WERE
CALLED TO THE SCENE
PARAMEDICS ARRIVED WITH
THE SPECIALIZED “catastrophes
unit" WHICH CONTAINS
VEHICLES, EQUIPMENT AND
PERSONAL FOR LARGE NUMBER
OF CASUALTIES
T
e
Emergency
Time
EXPOSED : 2
firefighters
NOT
EXPOSED :
paramedics

5. M. Lucidi
TEMPORARY REINFORCEMENT
5
“Exposure Factor in a Controlled Demolition”
FIREMAN in ACTION for
REALIZATION of TEMPORARY
REINFORCEMENT
TECHNICAL INSPECTION for
DETERMINATION of CONFORMITY to
STANDARD HUMAN HABITATION
UNFIT for HUMAN
HABITATION , but NOT for
TECHNICIANS
T
e
Emergency
Time
T
a
Habitable
Time
EXPOSED : 5
firefighter
EXPOSED : 1 or
2 technicians

6. M. Lucidi
CONTROLLED DEMOLITION with EXPLOSIVE
6
“Exposure Factor in a Controlled Demolition”
TIME
RISK

PRE
DEMOLITION
DEMOLITION DESIGN
ACCIDENTAL
COLLAPSE
TOTAL/PARTIAL
After
CONSTRUCTION
SITE OPENING
DURING
REALIZATION of
the DEMOLITION
DESIGN
for EXTRA
NATURAL EVENTS
(earthquake, wind)
For
CONTRADICTION
between
DESIGN/AS BUILT
For IMPROPER
USE of the
EXPLOSIVE
T*
0d
Start
Preliminary
Operation
Demolition
Time
EXPOSED : 5 explosive
technicians squad + 2 responsibles

7. M. Lucidi
CONTROLLED DEMOLITION with EXPLOSIVE
7
“Exposure Factor in a Controlled Demolition”
T
0d
Start
Demolition
Time
TIME
NOT EXPOSED : during
the explosion there isn’t
anyone inside blast security
area

8. M. Lucidi
DEMOLITION FAILURE
8
“Exposure Factor in a Controlled Demolition”
TIME
RISK

POST
DEMOLITION
INVESTIGATION – FAILURE CAUSES
NOT COLLAPSE or
ACCIDENTAL PARTIAL
COLLAPSE
For FAILURE
EXPLOSION
For WRONG
DEMOLITION
DESIGN
For CONTRADICTION
between DESIGN/AS
BUILT
T’
d
Failure
Demolition
Time
NOT EXPOSED : after failure
must applied standard security
procedures before investigate the
structure

9. M. Lucidi
DEMOLITION FAILURE
9
“Exposure Factor in a Controlled Demolition”
T’
d
Start
Investigation
Operation
Time
EXPLOSIVE INVESTIGATION :
- NOT CONTROL the QUALITY of EXPLOSIVE
MATERIALS
- NOT VERIFY FUSE JOINTS
- NOT EXACT POSITIONING EXPLOSIVE LIKE the
DEMOLITION PLANNING
DESIGN ANALYSIS :
- ERRORS in LINES of FIRE DESIGN
- ERRORS in SELECT PROGRAMMING SERIES
BLAST DELAYS
- ERRORS in SELECT LOCATION for EXPLOSIVES
- NOT VERIFY the COHERENCE between DESIGN
and AS BUILT
FAILURE
EXPLOSION

FAILURE
DESIGNER

NOT EXPOSED : study phases
NOT EXPOSED : study phases

10. M. Lucidi
HIGH RISK
10
“Exposure Factor in a Controlled Demolition”
the controlled demolition
with explosive is more
secure in the demolition
sector. But if I’ve had an
not collapse or a partial
collapse in place of total
demolition like design, it’s
less secure type of
demolition.
T”
d
Extra Start
Operation
Demolition
Time
P

P

V

V

E

E

R

=
EXPOSED : 5
explosive technicians
squad + 2 responsibles
+ 3 machinists

11. M. Lucidi
REDUCE RISK with EXPOSURE
11
“Exposure Factor in a Controlled Demolition”
T”
d or T*’
d
Extra
Operation
Demolition
Time
96,30%
WHY USE EXPLOSIVE AGAIN?

HAVE A TIME CONSTRAINT?

HAVE A SPACE LIMIT?
I choose to induce a blow down with an
another type of controlled demolition, and
after, in a stable condition, use explosive