CDMP: Reference Criteria: Appendix 1 (Figures and Tables)

Reference Criteria for Consulting Services
for Infrastructure Projects

Appendix 1: Figures and Tables

Appendix 1: Figures and Tables

Figure 1: Regional Map of Wind-Pressure Contours
Figure 2: Durst and Drayer-Marshall Graphs
Figure 3: Graphs: S3 Factor for Return Period and Probabilities
Figure 4: Isoacceleration Map of the Eastern Caribbean
Figure 5: Rainfall-Duration-Frequency Curves for Seawell Airport, Barbados
Figure 6: Tsunami Heights for Realistic Kick ’em Jenny Eruption
Table 1: Reference Wind Velocity Pressures and Wind Speeds (50 year return period)
Table 2: Z Values and Seismic Zone Coefficients
Table 3: Seismic Hazard Values for Structural Design Purposes: Commonwealth Caribbean

Figure 1 Regional Map of Wind-pressure Contours
(from CUBiC)

figure1.gif (16469 bytes)

Table 1 Reference Wind Velocity Pressures and Wind Speeds (50 year return period)
(from CUBiC)

Location	q_ref CUBiC	10 min CUBiC	1 hr	1 min (or "fastest mile")	3 sec
Antigua	0.82	37	35	45	56
Barbados	0.70	34	32	41	51
Belize - N Belize - S	0.78 0.55	36 30	34 29	43 37	54 45
Dominica	0.85	38	36	46	57
Grenada	0.60	32	30	38	47
Guyana	0.20	18	17	22	27
Jamaica	0.80	37	35	44	55
Montserrat	0.83	37	36	48	59
St Kitts/Nevis	0.83	37	36	48	59
St Lucia	0.76	36	34	43	57
St Vincent	0.73	35	33	42	56
Tobago	0.47	28	26	38	42
Trinidad - N Trinidad - S	0.40 0.25	26 20	25 19	31 25	39 30
Notes	q_ref = pressures in kilopascals (kPa)	Wind speeds in metres per second (ms^-1)

Figure 2 Durst and Drayer-Marshall Graphs
(Ratio of Probable Maximum Speed Averaged over t Seconds to Hourly Mean Speed)

figure2.gif (7009 bytes)

Figure 3 Graphs: S₃ Factor for Return Period and Probabilities
(from OAS/NCST/BAPE Code)

figure3.gif (11522 bytes)

Table 2 Z Values and Seismic Zone Coefficients
(from CUBiC)

Territory	Z Value CUBiC& UBC 85	Z Factor UBC 1988 & SEAOC 1990	Zone Number SEAOC
Antigua	0.75	0.3	3
Barbados	0.375	0.15 - 0.2	2
Belize - (areas within 100km of southern border, ie including San Antonio and Punta Gorda but excluding Middlesex, Pomona and Stann Creek) Belize - (rest of)	0.75 0.50	0.3 0.2	3 2+
Dominica	0.75	0.3	3
Grenada	0.50	0.2	2+
Guyana - (Essequibo) Guyana - (rest of)	0.25 0.00	0.1	1+
Jamaica	0.75	0.3	3
Montserrat	0.75	0.3	3
St Kitts/Nevis	0.75	0.3	3
St Lucia	0.75	0.3	3
St Vincent	0.50	0.2	2+
Tobago	0.50	0.2	2+
Trinidad - (NW) Trinidad - (rest of)	0.75 0.50	0.3 0.2	3 2+

Figure 4 Isoacceleration Map of the Eastern Caribbean
(from John Shepherd – PAIGH)

isoaccel.gif (202810 bytes)

Table 3 Seismic Hazard Values for Structural Design Purposes: Commonwealth Caribbean
(compiled by Tony Gibbs)

Country				PAIGH		PAIGH/TG		Equivalent		Conservative
	CUBiC Z values 1985	Equivalent Zone Number (SEAOC 80)	Equivalent Z factor (UBC 88)	isoacceleration lines		Z factor	Zones	Zone No	Z factor	Zone No	Z factor
	CUBiC Z values 1985	Equivalent Zone Number (SEAOC 80)	Equivalent Z factor (UBC 88)	max	min	1993/94	1993/94	(SEAOC 80)	(UBC 88)	(SEAOC 80)	(UBC 88)
Anguilla				300	250	0.500	2.5	2.5	0.20	3	0.30
Antigua & Barbuda	0.750	3	0.30	850	450	1.000	4	4	0.40	4	0.40
Bahamas - southern				115	70					1	0.15
Barbados	0.375	2	0.15	225	175	0.375	2	2	0.15	3	0.25
Belize - north	0.500	2.5	0.20	200	120					2	0.20
Belize - south	0.750	3	0.30	240	200					3	0.25
British Virgin Islands				550	450	1.000	4	4	0.40	4	0.40
Cayman Islands				160	80	0.375	2	2	0.15	2	0.20
Cuba				250	80					3	0.25
Dominica	0.750	3	0.30	300	250	0.500	2.5	2.5	0.20	3	0.30
Dominican Republic				425	225					4	0.40
Grenada	0.500	2.5	0.20	175	125	0.375	2	2	0.15	2	0.20
Guyana - Essequibo	0.250	1.5	0.10	130	90					1	0.15
Guyana - remainder	0.000	0	0.00	90	80					1	0.10
Haiti				250	125					3	0.25
Jamaica	0.750	3	0.30	260	150					3	0.30
Montserrat	0.750	3	0.30	600	400	1.000	4	4	0.40	4	0.40
Puerto Rico				350	240			4	0.40	4	0.35
St Kitts & Nevis	0.750	3	0.30	450	300	0.750	3	3	0.30	4	0.40
St Lucia	0.750	3	0.30	175	150	0.375	2	2	0.15	2	0.20
St Vincent & the Grenadines	0.500	2.5	0.20	175	100	0.375	2	2	0.15	2	0.20
Trinidad - NW	0.750	3	0.30	370	300	0.750	3	3	0.30	4	0.40
Trinidad - remainder	0.500	2.5	0.20	370	300	0.750	3	3	0.30	4	0.40
Tobago	0.500	2.5	0.20	300	270	0.500	2.5	2.5	0.20	3	0.30
Turks & Caicos Islands				160	80					2	0.20

Notes:

In the Zone columns 1.5 means between 1 and 2
In the Zone columns 2.5 means between 2 and 3
CUBiC = Caribbean Uniform Building Code
SEAOC = Structural Engineers Association of California
UBC = Uniform Building Code (ICBO)
ICBO = International Conference of Building Officials
PAIGH = Pan American Institute of Geography and History
PAIGH/TG = PAIGH's research ( by Dr Shepherd) interpreted by Tony Gibbs

Figure 5 Rainfall-Duration-Frequency Curves for Seawell Airport, Barbados, Based on recording rain-gauge data for the period 1942-70. Station elevation – 183 feet above MSL
(from Lirios)

figure5.gif (23430 bytes)

Figure 6 Tsunami Heights for Realistic Kick ’em Jenny Eruption
(from Martin Smith & John Shepherd)

tsunami.gif (60195 bytes)

CDMP home page: http://www.oas.org/en/cdmp/

Project Contacts

Page Last Updated: 20 April 2001

Reference Criteria for Consulting Services for Infrastructure Projects

Appendix 1: Figures and Tables

Appendix 1: Figures and Tables

Figure 1 Regional Map of Wind-pressure Contours (from CUBiC)

Table 1 Reference Wind Velocity Pressures and Wind Speeds (50 year return period) (from CUBiC)

Figure 2 Durst and Drayer-Marshall Graphs (Ratio of Probable Maximum Speed Averaged over t Seconds to Hourly Mean Speed)

Figure 3 Graphs: S3 Factor for Return Period and Probabilities (from OAS/NCST/BAPE Code)

Table 2 Z Values and Seismic Zone Coefficients (from CUBiC)

Figure 4 Isoacceleration Map of the Eastern Caribbean (from John Shepherd – PAIGH)

Table 3 Seismic Hazard Values for Structural Design Purposes: Commonwealth Caribbean (compiled by Tony Gibbs)

Figure 5 Rainfall-Duration-Frequency Curves for Seawell Airport, Barbados, Based on recording rain-gauge data for the period 1942-70. Station elevation – 183 feet above MSL (from Lirios)

Figure 6 Tsunami Heights for Realistic Kick ’em Jenny Eruption (from Martin Smith & John Shepherd)

Reference Criteria for Consulting Services
for Infrastructure Projects

Figure 1 Regional Map of Wind-pressure Contours
(from CUBiC)

Table 1 Reference Wind Velocity Pressures and Wind Speeds (50 year return period)
(from CUBiC)

Figure 2 Durst and Drayer-Marshall Graphs
(Ratio of Probable Maximum Speed Averaged over t Seconds to Hourly Mean Speed)

Figure 3 Graphs: S₃ Factor for Return Period and Probabilities
(from OAS/NCST/BAPE Code)

Table 2 Z Values and Seismic Zone Coefficients
(from CUBiC)

Figure 4 Isoacceleration Map of the Eastern Caribbean
(from John Shepherd – PAIGH)

Table 3 Seismic Hazard Values for Structural Design Purposes: Commonwealth Caribbean
(compiled by Tony Gibbs)

Figure 5 Rainfall-Duration-Frequency Curves for Seawell Airport, Barbados, Based on recording rain-gauge data for the period 1942-70. Station elevation – 183 feet above MSL
(from Lirios)

Figure 6 Tsunami Heights for Realistic Kick ’em Jenny Eruption
(from Martin Smith & John Shepherd)