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Engineering

Engineering. Design Issues for EOC’s, Hurricane Shelters and other Essential Facilities . Florida Emergency Operations Centers Design and Evaluation Criteria . Danny Kilcollins, FPEM Planning Manager Division of Emergency Management. Features of a Survivable EOC.

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Engineering

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  1. Engineering Design Issues for EOC’s, Hurricane Shelters and other Essential Facilities

  2. Florida Emergency Operations Centers Design and Evaluation Criteria Danny Kilcollins, FPEM Planning Manager Division of Emergency Management

  3. Features of a Survivable EOC

  4. Minimum Hurricane Safety Criteria for Critical Facilities

  5. ARC 4496 Hurricane Hazards • Wind • Storm Surge Flooding • Rainfall Flooding • Hazardous Materials

  6. High Performance Design Criteria: DOE-STD-1020

  7. DOE-STD-1020 Natural Hazards • Wind • Flooding • Earthquake

  8. Hurricane Wind Design

  9. DOE 1020 Wind Design

  10. Return Period Years

  11. ASCE 7-02

  12. Florida Building Code – Basic Wind Speeds and Windborne Debris Impact Regions

  13. Basic Wind Speed Conversions

  14. 1,000-yr Return Period

  15. 1,000-yr Recurrence Wind Speeds for Florida

  16. Fla. PC 3 Wind Design Criteria

  17. 10,000-yr Return Period

  18. 10,000-yr Recurrence Wind Speeds for Florida

  19. Fla. PC 4 Wind Design Criteria

  20. Probable Minimum Central Pressure Limit Estimate for Hurricanes; Source: K. Emanuel (1996)

  21. Minimum Central Pressure to Wind Velocity Conversion • Source: Hurricanes and Typhoons: Past, Present and Future; Landsea, etal • 880 mb = 190 mph (232 mph, 3-sec gust) • 885 mb = 185 mph (226 mph, 3-sec gust) • 890 mb = 180 mph (220 mph, 3-sec gust) • 900 mb = 170 mph (208 mph, 3-sec gust) • 910 mb = 165 mph (202 mph, 3-sec gust)

  22. Windborne Debris Impact Resistance Criteria

  23. Representative Wind Design Criteria • Applies to the EOC and essential ancillary structures and service equipment • Wind Load Design per ASCE 7 Standard • Load Factor Reductions per (draft) ICC 500 • Minimum Design Wind Speed = 190 mph, 3-second gust • Wind Importance Factor, I=1.00 • Exposure Category = C • Directionality Factor, Kd=1.00 • Internal Pressure Coefficient, GCpi= +0.18/-0.18

  24. Representative Wind Design Criteria • The EOC designated as a threshold building, and special structural inspections required • Special inspections conducted in compliance with section 553.79, Florida Statutes and other applicable statutes, laws and rules

  25. Representative Wind Design Criteria • Design Windborne Debris Missile = 15 lb 2x4 propelled at 50 mph (74 ft/sec) • Momentum = 34 lb-sec • Energy = 1,275 ft-lb • Design missile applies to all exterior enclosure components, claddings and assemblies (i.e., walls, roofs, louvers, windows, doors, etc.) • Design missile applies to enclosure surfaces located within 60 feet in height above finish grade

  26. Tornado Wind Design

  27. FEMA 361 – Tornado Winds

  28. FEMA 361 Wind Zones

  29. TORNADO EVENTS IN FLORIDA F0

  30. Representative Tornado Wind Design • Applies to the EOC and essential ancillary structures and service equipment • Wind Load Design per ASCE 7 Standard • Load Factor Reductions per FEMA 361 • Minimum Design Wind Speed = 200 mph, 3-second gust • Wind Importance Factor, I=1.00 • Exposure Category = C • Directionality Factor, Kd=1.00 • Internal Pressure Coefficient, GCpi= +0.55/-0.55 • Atmospheric Pressure Change (APC) or venting req’d

  31. Representative Wind Design Criteria • The EOC designated as a threshold building, and special structural inspections required • Special inspections conducted in compliance with section 553.79, Florida Statutes and other applicable statutes, laws and rules

  32. Representative Wind Design Criteria • Design Windborne Debris Missile = 15 lb 2x4 propelled at 100 mph (147 ft/sec) • Momentum = 68 lb-sec • Energy = 5,033 ft-lb • Design missile applies to all exterior enclosure components, claddings and assemblies (i.e., walls, roofs, louvers, windows, doors, etc.) • Design missile applies to enclosure surfaces located within 150 feet in height above finish grade

  33. Flood & Rainfall Design

  34. DOE 1020 Flood Criteria

  35. NOAA HMR No. 51 and No. 52Probable Maximum PrecipitationEstimates

  36. 24-hour PMP @ 10 sq.mi. Basin

  37. 72-hour PMP @ 10 sq.mi. Basin

  38. Estimated 24-hour Rainfall Rates w/Recurrence Intervals

  39. Conversion of 10 sq.mi. PMPs to 1 sq.mi. PMPs

  40. 1-hour PMP @ 1 sq.mi. Basin

  41. Estimated 1-hour Rainfall Rates w/Recurrence Intervals

  42. Summary of Flood Design Criteria

  43. Summary of Flood Design Criteria

  44. Storm Surge Flooding • SLOSH Storm Surge Model • Category 5 inundation depth/elevation, NGVD • Maximum Envelope of Water • Margin of Error = +/- 20% • Category 5 elev. + 20% = Probable Maximum Inundation

  45. Storm Surge Flooding • Fla. Performance Category 3 = Cat. 5 + 15% • Fla. Performance Category 4 = Cat. 5 + 20% • Performance suggested per county based on PC 4 (10,000-yr) Wind Map • Design wind speeds at coast that are greater than or equal to 190 mph (3-sec. gust) = Cat. 5 + 20% • Design wind speeds at coast that are less than 190 mph (3-sec. gust) = Cat. 5 + 15%

  46. Representative Flood Design Criteria • Applies to lowest floor for the EOC and essential ancillary structures and service equipment • Finished Floor Elevation NGVD determined by: • Category 5 storm surge elev. + 20% • BFE + 3.0 feet • 500-yr elevation + 2.0 feet • Highest recorded flood elevation + 3.0 feet • Whichever flood elevation is highest

  47. Representative Flood Design Criteria • The site (point maximum, one square mile) hydrologic design shall ensure that the EOC and essential ancillary structures and service equipment are not flooded due to a 24 hour, 37.0 inch rainfall event applied over a precedent 24 hour, 100-year rainfall event • Opinion of design professional is acceptable • Basin-wide analysis not required

  48. Representative Flood Design Criteria • Where secondary (emergency) roof drains or scuppers are required by the Florida Building Code—Plumbing, the secondary system shall be sized for a rainfall rate of eleven (11.0) inches per hour

  49. Earthquake Design

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