introduction to fire safety engineering -...

Introduction to Fire Safety Engineering

José L. ToreroA. James Clark School of Engineering, The University of Maryland, USA

Fire S

afety En

gin

eering

: Mo

re than

a co

mb

ustio

n p

rob

lem ad

dressin

g

a com

bu

stion

pro

blem

5/28/2018 2ES

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Fire• Physical phenomenon that evolves in space and time –

affect the wellbeing of people and property

Ignition

Voluntary

Accident

Natural

Human

Growth

Losses Pro

tectio

n

SafetyRegulation

Codes & Profession

Crime

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Example: ConstructionArchitectural

Concept

Consultation

with Parties

No

Fire Safety•Authorities (Building

Certifiers)

•Fire Brigades

Yes

Construction

Inspection

Structural

Design

Design of

Services

Design of Fire

Safety

Systems

Fire Safety•Authorities (Building

Certifiers)

•Fire Brigades

NoYes

AcceptanceES

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The Cost of Error

Construction

Acceptance

DesignArchitecture£

£1 £2

£ Unlimited

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Structures

Architecture• Smoke Management

• Evacuation

• Access for Fire Brigade

Civil

Engineering• Fire Resistance

Mechanical

Engineering• HVAC systems

• Hydraulic Systems

Fire Safety

Engineering

• Detection & Alarm

• Smoke Management

• Suppression & Control

• Fire Resistance

• Evacuation

• Access for F.B.

•Security

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•A

ffec

ts e

very

asp

ect

of

bu

ildin

g d

esig

n

Time Lines

t

%

100%

Structural

Failure

Evacuation

Completed

Untenable

Conditions

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Fire Safety Strategies

• Prescriptive Design

• Performance Based Design

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Life Safety

Compartmentation

Response

Structure

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Life Safety

Compartmentation

Response

Structure

Common

Sense

Common

Sense

Common

Sense

Specify According to

Manufacturers Standard Test

Data

Locate According to

manufacturers

Specifications

Define

according to

simple rules

(Common

Sense)

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t

% Structural

Failure100%

Evacuation

Completed

Untenable

ConditionsSolutionE

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Can the same rules

be applied?

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Intercontinental Hotel,

Shanghai

Charles de Gaulle Airport,

ParisThe Dome

London

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Compliance vs. Profession

• Limited to conventional buildings

– Conventional is less and less frequent

– Construction has evolved faster than codes

– Construction has evolved faster than our capacity to train authorities/engineers/fire service

• Codes can only be used as a tool for the competent professional

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ES

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ES

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ES

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ES

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The Objectives

te<<<<tf

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Summary

• Fire Safety Engineering is a complex field that interacts with all other disciplines in the construction process

• Codes and Standards (classic practises) are viable only for simple buildings – complex buildings require higher level engineering

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Example

• Santiago Calatrava– Architect– Date of Birth: July 28th, 1951

– Gold Medal AIA, USA

– Grand Medaille D’Or Academied’Architecture, Paris, France

– Il Principe e l’Architetto, Italy

– Sir Micha Black Medal, Royal College of Art, UK

– Gold Medal IStructE, UK

– Premio Principe de Asturias, Spain

– More than 10 Honorary Doctorates

ESIA

–Ec

ole

de

s Sc

ien

ces

de

l’In

cen

die

et

Ap

plic

atio

ns

–O

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m

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High Rise Buildings

“Turning Torso” (Malmo, Sweden)

“The Spire”

(Chicago, USA)

ESIA

–Ec

ole

de

s Sc

ien

ces

de

l’In

cen

die

et

Ap

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ns

–O

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• Evacuation– Detection– Alarm– Displacement away from the fire– Crowd management

• Compartmentalization– Slows fire growth– Minimizes smoke spread

• Response– Automatic (fire suppression)– External– Internal

• Structural Integrity

Fire Safety StrategiesE

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What are the Problems

• Compartimentation

• Structural

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Dia-Grid

• Allows for unusal deformations

that have the potential to break

compartimentation

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ES

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Detailed Models

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Detailed Models

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Allen Lambert Gallery (Canada)

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Unprotected

structure

High Ceilings

•Delayed detection

•Delayed sprinkler

Activation

Smoke

Management

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Egress Problem

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Combined

Construction

Methods

(Modern-

Classic)

Refurbishment

of Historical

Monument

Complex use of

materials

(plastic, steel,

stone, etc.)

Interconnected

Multiple Uses

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ES

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ES

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ES

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Therefore

• For involuntary man slaughter?

Wanted

SantiagoCalatrava

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Wanted

ChristianPortzamparc

Wanted

James Stirling

Wanted

I.M.Pei

Wanted

Frank GeHry

Wanted

RenzoPiano

Wanted

NormanFoster

Wanted

Richard Rogers

Wanted

ZahaHadiD

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•No!•The solution is: oproper engineering!

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When it is done right• Kohn Pedersen Fox

• 80 Storey Building in London

• Formed of many 4 storey “villages”

• Arup: Fire Engineering

Heron Tower

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Key Issues

• How Would a 4 Storey Fire affect:

o The structural performance of the building?

o Egress?

o Fire Detection & Suppression?

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Modelling of the Fire

Figure 3.1: Default domain of atrium building

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Today: Design for Implicit Performance

Standardization of Space

Standardization of Response

One Size Fits All

Means of Escape

Compartmentation

Geometry

Active

Passive

Fire Service

Consequence:Enormous Safety Factors

Waste

Unidentified Mistakes

Compromised

Aesthetics

Loss of Function

Unsustainable

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Tomorrow: Design for Explicit Performance

Materials

Burning

Smoke/Heat

Structure

People

Design

Education

Quantifiable Safety Factors: Sustainable

Material

Science

Reactive

Flow

Fluid

Mechanics

Heat Transfer

Solid

MechanicsPhysiology

Psychology

Sociology

Architecture

Regulatory

Law

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The structure has to be seen! – I wanted to leave the steel structure

exposed but Fire Safety regulations did not allow me to do so – we had to attach fake stained

bronze structural elements to approach what I was looking for –

every time I think about it I feel like crying!

Ludwig Mies van der Rohe, Seagram Building, NY, 1958

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