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
HIGHRISK

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.
Te
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
Te
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
Te
Emergency
Time
Ta
Habitable
Time
EXPOSED : 5
firefighter
EXPOSED : 1 or
2technicians

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 : 5explosive
technicians squad + 2responsibles

7. M. Lucidi
CONTROLLED DEMOLITION with EXPLOSIVE
7
“Exposure Factor in a Controlled Demolition”
T0d
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