SEC_CCAD Parking FDS Study Presentation - 071708
-
Upload
jason-thompson -
Category
Documents
-
view
212 -
download
0
Transcript of SEC_CCAD Parking FDS Study Presentation - 071708
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 1/11
CLEVELAND CLINICCLEVELAND CLINIC
ABU DHABI ABU DHABI
ABU DHABI, UNITED ARAB EMIRATES ABU DHABI, UNITED ARAB EMIRATES
July 17, 2008July 17, 2008
2
Purpose of PresentationPurpose of Presentation
Project overviewProject overview
Describe alternative design approaches to codeDescribe alternative design approaches to code
compliancecompliance
Review performance objectives related codeReview performance objectives related code
requirements and local amendmentrequirements and local amendment
Define equivalent performance criteriaDefine equivalent performance criteria
Contemplated alternate design featuresContemplated alternate design features
Review proposed engineering evaluation methodsReview proposed engineering evaluation methods
Review outline of Alternate Design ReportReview outline of Alternate Design Report
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 2/11
3
Project OverviewProject Overview
Parking Garage:Parking Garage:
Three levels parking garages below the main structureThree levels parking garages below the main structure
Three compartments on each levelThree compartments on each level
Compartments separated by physical barrier or fireCompartments separated by physical barrier or fire
shuttersshutters
4
Parking Garage CompartmentsParking Garage Compartments
South
Compartment
East
CompartmentWest
Compartment
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 3/11
5
Alternative Design Approaches Alternative Design Approaches
Parking Garage Smoke Exhaust Design MethodParking Garage Smoke Exhaust Design Method
Code Requirements and Local Amendments:Code Requirements and Local Amendments: Duration of OperationDuration of Operation (IBC Sec. 909.4.6)(IBC Sec. 909.4.6) – – capable ofcapable of
continued operation after fire detection for not less thancontinued operation after fire detection for not less than20 minutes20 minutes
Exhaust RateExhaust Rate – – 10 air changes per hour 10 air changes per hour
Al ternat ive Design Approach Al ternat ive Design Approach :: 6 air changes per hour smoke exhaust rates6 air changes per hour smoke exhaust rates
Smoke layer interface height based on evaluation ofSmoke layer interface height based on evaluation oftenability factors at 6 feet above walking surfacestenability factors at 6 feet above walking surfaces
6
Prescr iptive Code ObjectivesPrescr iptive Code Objectives
Parking Garage ExhaustParking Garage Exhaust
Smoke removal within the parking area to provideSmoke removal within the parking area to provide
occupants with relatively safe egress from the spaceoccupants with relatively safe egress from the space
Dilute products of fire plume for fire fighters to conductDilute products of fire plume for fire fighters to conduct
search and rescue operationssearch and rescue operations
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 4/11
7
Alternate Design Performance Cri teria Alternate Design Performance Cri teria
Smoke Exhaust in Parking GarageSmoke Exhaust in Parking Garage
Position of Smoke Layer Interface based onPosition of Smoke Layer Interface based on
NFPA 92B criteria:NFPA 92B criteria:
Visibility.Visibility.
TemperatureTemperature..
CO concentration.CO concentration.
Duration of Smoke Exhaust:Duration of Smoke Exhaust:
A minimum of 20 minutes A minimum of 20 minutes
8
Engineering Analyses to SubstantiateEngineering Analyses to Substantiate
EquivalencyEquivalency
Fire Dynamics Simulator (FDS) andFire Dynamics Simulator (FDS) and
SmokeviewSmokeview
Developed by the National Institute of StandardsDeveloped by the National Institute of Standards
and Technology (NIST).and Technology (NIST).
FDS is a computational fluid dynamics (cfd)FDS is a computational fluid dynamics (cfd)
computer model that predicts the growth andcomputer model that predicts the growth and
spread of fire and its products of combustionspread of fire and its products of combustion
Smokeview is a software tool designed to visualizeSmokeview is a software tool designed to visualize
the results generated by FDS.the results generated by FDS.
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 5/11
9
Engineering Analyses to SubstantiateEngineering Analyses to Substantiate
Equivalency (ContEquivalency (Cont’’d)d)
FDS and Smokeview will be used toFDS and Smokeview will be used to
evaluate the following:evaluate the following:
Smoke movement and effectiveness of parkingSmoke movement and effectiveness of parking
garage smoke control systemgarage smoke control system
Temperatures within the fire compartmentTemperatures within the fire compartment
Position of smoke layer relative to building &Position of smoke layer relative to building &
occupantsoccupants
10
Evaluation of Design ConceptEvaluation of Design Concept
------ 3D Model of West/East Compartments3D Model of West/East Compartments
WestCompartments
East
Compartments
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 6/11
11
Evaluation of Design ConceptEvaluation of Design Concept
------ 3D Model of South Compartments3D Model of South Compartments
South
Compartments
12
Evaluation of Design ConceptEvaluation of Design Concept
------ FDS Model of West/East CompartmentsFDS Model of West/East Compartments
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 7/11
13
Evaluation of Design ConceptEvaluation of Design Concept
------ FDS Model of South CompartmentsFDS Model of South Compartments
14
Design AssumptionsDesign Assumptions
Key AssumptionsKey Assumptions
A car fire propagation occurs (i.e. two cars burning A car fire propagation occurs (i.e. two cars burning
in 20 minutes)in 20 minutes)
Statistics on real car fire in EuropeStatistics on real car fire in Europe
88% in dwelling buildings and 12% related to public88% in dwelling buildings and 12% related to public
buildingsbuildings
9090--95% did not involve cars or one car only.95% did not involve cars or one car only.
The actual rate of heat release remained belowThe actual rate of heat release remained below
values observed for free burning cars for enclosedvalues observed for free burning cars for enclosed
parking garageparking garage Plastic burning materialPlastic burning material
Do not consider effect of sprinkler systemDo not consider effect of sprinkler system
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 8/11
15
Preliminary FDS ResultsPreliminary FDS Results
------ West/East Compartments on Level P1West/East Compartments on Level P1
WestEast
16
Preliminary FDS ResultsPreliminary FDS Results
------ South Compartments on Level P1South Compartments on Level P1
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 9/11
17
Preliminary FDS ResultsPreliminary FDS Results
------ West/East Compartments on Level P2West/East Compartments on Level P2
East West
18
Preliminary FDS ResultsPreliminary FDS Results
------ South Compartments on Level P2South Compartments on Level P2
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 10/11
19
Preliminary FDS ResultsPreliminary FDS Results
------ West/East Compartments on Level P3West/East Compartments on Level P3
10 Air Changes
6 Air Changes
8 Air Changes
20
SummarySummary
6 air changes does not maintain a tenable6 air changes does not maintain a tenable
environment around the designenvironment around the design fire area for allfor all
three compartments on Level P3three compartments on Level P3
8 and 10 air changes do not maintain8 and 10 air changes do not maintain a tenable
environment around the design fire area as wellas well
The FDS modeling results look the same for inputsThe FDS modeling results look the same for inputs
of 6, 8 and 10 air changesof 6, 8 and 10 air changes
6 or 10 air changes for Level P3 smoke exhaust?6 or 10 air changes for Level P3 smoke exhaust?
6 air changes works for all three compartments on6 air changes works for all three compartments on
Level P2Level P2
6 air changes works for all three compartments on6 air changes works for all three compartments on
Level P1Level P1
8/17/2019 SEC_CCAD Parking FDS Study Presentation - 071708
http://slidepdf.com/reader/full/secccad-parking-fds-study-presentation-071708 11/11
21
Al ternat ive Design Documentation Alternative Design Documentation
Alternative Design Report Alternative Design Report
Prepared and submitted to AHJ in accordancePrepared and submitted to AHJ in accordance
with IBC Sec. 104.11with IBC Sec. 104.11
Demonstration of equivalency to the fire protectionDemonstration of equivalency to the fire protection
and life safety intended by the prescriptive codeand life safety intended by the prescriptive code
requirements and local amendmentsrequirements and local amendments
Supporting engineering documentation:Supporting engineering documentation:
Fire modeling evaluation and resultsFire modeling evaluation and results