Performance-based design for building fire safety ... - Nexus-idrim.net

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éééééééOnly 1 typical floor with one 1.5 meter wide exit is considered inthe simulation. Total number of occupants inside the floor is 78.The simulation setup is shown in figure. During the simulation, theresponse time of the occupants is based on random distributionwith mean value equal to 1 min/s.Two occupant types are considered.é elderly typeé all male with 0.5 m/s.For elderly type, the total evacuation time is ~100 sec.For all male with 0.5 m/s, the total evacuation time is 135 sec.This shows that by simply change the occupant type, the simulatedevacuation time is increased by 35 %.A cumulative frequency curve is shown to illustrated the timerequired for the occupants to pass through the exit in floor 1.IDRiM'09 56
Untenable conditions★★★The untenable uteabeconditions o might gtbe determined ed by the tesmoke layer clear height, thermal radiation from fire andenclosure temperature.The time from ignitioni i to the occurrenceof untenableconditions will be estimated and taken to be theavailable safe egress time (ASET) for the buildingoccupants.For example, from PD7974-6:2004 of BS7974, theproposed tenability limits for smoke is Dm -1 =0.0808(visibility 10m).★ Other proposed tenability limits are 2.5kWm -2 forexposure to radiant heat, 115 o C for up to 5 minutesexposure to convected heat etc.IDRiM'09 57
Page 1 and 2:
The 9 th IIASA-DPRI FORUM on Integr
Page 3 and 4:
Introductionti★★★In Hong Kong
Page 5 and 6: The prescriptive codes, basically o
Page 7 and 8: Introductionti★In the code of pra
Page 9 and 10: Introductionti★ Under the prescri
Page 11 and 12: PNAP 204 Guide to Fire EngineeringA
Page 13 and 14: SFPE Engineering Guide toPerformanc
Page 15 and 16: Process Flowchart (SFPE)Defining Pr
Page 17 and 18: BS 7974Application of fire safety e
Page 19 and 20: Procedure for undertaking the QDR
Page 21 and 22: Components of Step 5: Identificatio
Page 23 and 24: Components of Step 6 : Establish fi
Page 25 and 26: Quantitative Analysis★ To simplif
Page 27 and 28: SS1: Initiation and development of
Page 29 and 30: SS1: Design fires★★Following id
Page 31 and 32: Pre-flashover design fires★ t 2 f
Page 33 and 34: SS1: outputSub-system 1Heat release
Page 35 and 36: SS2: analysis ofsmoke andtoxic gase
Page 37 and 38: SS3: Structural responseseand fire
Page 39 and 40: SS3: Structural responseand fire sp
Page 41 and 42: SS4: Detection of fire and activati
Page 43 and 44: SS5: Fire service intervention (see
Page 45 and 46: Time line approachIDRiM'09 45
Page 47 and 48: TimeAvailable safe egress time (ASE
Page 49 and 50: ★★★★Based on above formula,
Page 51 and 52: ★ Physical conditions, occupant d
Page 53 and 54: Example4.6 m16.21 m73.51m1.78mIDRiM
Page 55: Evacuation profileNo. of people pas
Page 59 and 60: Simulation layoutMonitoring point(t
Page 61 and 62: Smoke spread at 80 secondIDRiM'09 6
Page 63 and 64: Temperature distribution near the f
Page 65 and 66: Temperature profile at different ti
Page 67 and 68: CO concentration ti profileCarbon M
Page 69 and 70: Other examples69
Page 71 and 72: moviestaircaseFire size = 2MW192 x
Page 73 and 74: Conclusion★★Fire engineering ap
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