2nd SeRoN Workshop 20120426 6 Simulation tools for the ... · Simulation Tools for the Assessment of ... Software SOFiSTiK ... 2nd_SeRoN_Workshop_20120426_6_Simulation tools for the

SeRoNSeRoNCommunity Research

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Research Executive Agency (REA)

Security Research Unit

(S.3)

Simulation Tools for the Assessment of

Blast and Fire Consequences

Kasper Cramon Jørgensen, NIRAS A/SKasper Cramon Jørgensen, NIRAS A/S

2nd SeRoN Workshop – Cologne, 26th April 2012


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(S.3) SeRoN methodology - Overview

START

Road Corridor Selection

Identification of potentially

critical infrastructure objects

Network level

GENERAL ROAD CORRIDOR &

INFRASTRUCTURE DATA

Ranking of infrastructures

according to network importance

DETAILED NETWORK DATA

© SeRoN Consortium 2

RELEVANT OBJECTS

FOR DETAILED

INVESTIGATIONDETAILED TECHNICAL

INFRASTRUCTURE DATA

THREATS

Initial Relevance

Assessment (InRA)


Risk Analysis

Measure Analysis

END

MEASURES

Object level


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START




Network level


INFRASTRUCTURE DATA





RELEVANT OBJECTS

FOR DETAILED


INFRASTRUCTURE DATA

THREATS

Initial Relevance

Assessment (InRA)


Risk Analysis

Measure Analysis

END

MEASURES

Object level


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START




Network level


INFRASTRUCTURE DATA




> Attacks with explosives on bridges and in tunnels

> Attacks with fire in tunnels


RELEVANT OBJECTS

FOR DETAILED


INFRASTRUCTURE DATA

THREATS

Initial Relevance

Assessment (InRA)


Risk Analysis

Measure Analysis

END

MEASURES

Object level


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(S.3) Assessment of Blast and Fire Consequences

Assessment of blast and fire consequences includes

1. Simulation of the threat itself

> Explosion

> Fire


> Fire

2. Simulation of consequences of the threat

> Fatalities

> Structural damage

> Indirect consequence (non-availability)


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(S.3) Assessment of Blast and Fire Consequences

Assessment of blast and fire consequences includes

1. Simulation of the threat itself

> Explosion

> Fire


> Fire

2. Simulation of consequences of the threat

> Fatalities

> Structural damage

> Indirect consequence (non-availability)


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(S.3)

Simulation of threat: explosion


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(S.3) Explosive blast evaluation tools

> Empirical calculations

> Software HEXDAM

> Numerical simulations (LS-DYNA)



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(S.3) Explosive blast evaluation tools

> Empirical calculations

> Software HEXDAM

> Numerical simulations (LS-DYNA)

Complexity increases

Accuracy increases



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(S.3) Empirical calculations

© SeRoN Consortium


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(S.3) HEXDAM

> High EXplosive Damage Assessment Model

> Evaluates blast pressures in complex geometries

Object A:

© SeRoN Consortium

Object A:


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(S.3) Numerical Simulation

> LS-Dyna3D

> Analysis of explosions, explosion impact and structural damage

> Haute cuisine of blast modelling



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(S.3) Numerical Simulations

Movie on blast propagation in tunnel removed in uploaded version due to size. Contact [email protected]


size. Contact [email protected] movie.

CAA


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(S.3)

Simulation of threat: fire


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(S.3)

Investigation scenarios

Initial eventrepresentative

substancestate

Volume of

release(Load)

[t]

TypeOf release

Cause of release

Releaserate

Majoreffects

ContinuousLeak

(100 mm)20,6 kg/s Temperature,

15

Fire Pool FireGasoline /

DieselLiquid

28 t(50 t)

Continuous(100 mm)

20,6 kg/s Temperature,CO, soot Spontaneous

Tank failure

300 kg/s


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(S.3)

Investigation scenarios

Initial eventrepresentative

substancestate

Volume of

release(Load)

[t]

TypeOf release

Cause of release

Releaserate

Majoreffects

ContinuousLeak

(100 mm)20,6 kg/s Temperature,

16

Fire Pool FireGasoline /

DieselLiquid

28 t(50 t)

Continuous(100 mm)

20,6 kg/s Temperature,CO, soot Spontaneous

Tank failure

300 kg/s


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(S.3)

Examples of modeled objects

Object C: Cut and cover tunnel Object D: NATM tunnel

1717


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(S.3)

Example of

smoke propagation

1818


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(S.3)

Simulation of consequences of the threat:

fatalities


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(S.3)

Determination of effects

by evacuation simulation

Behaviour and perception based model

2020


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(S.3)



2121


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(S.3)



2222


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(S.3)



2323


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(S.3)

Simulation of consequences of the threat:

structural damage


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(S.3) Structural Analysis Tools

Increasing accuracy


Increasing complexity

Rstab

RuckZuck


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(S.3) Object A – Simulation tool

> Bridge Type: Beam (box girder) bridge ( SeRoN Type 14)

> Material: Pre-stressed concrete

> Simulation tool: Software SOFiSTiK

> Finite Element Program

> Discretization


> Discretization


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(S.3) Object A – Modeling strategy

> Modeling of the box girder with finite shell elements

> Modeling of load scenarios (blast):

> Removal of elements from the analysis model

> Reduction of the stiffness for elements inside adistinct radius to the blast center



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(S.3) Object A – Simulation 1

> Scenario: Explosive charge on deck



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(S.3) Object A – Simulation 2

> Scenario: Explosive charge next to pillar



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(S.3)

End of presentationThank you for your attention.


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2nd SeRoN Workshop 20120426 6 Simulation tools for the ... · Simulation Tools for the Assessment of ... Software SOFiSTiK ... 2nd_SeRoN_Workshop_20120426_6_Simulation tools for the