Disaster Mitigation

1
Disaster Mitigation in Health Facilities Wind
Effects Nonstructural Issues
2
Nonstructural elements to consider when assessing
vulnerability
ARCHITECTURAL
EQUIPMENT
BASIC INSTALLATIONS

• Façades
• Roof covers
• Parapets
• Chimneys
• Plaster
• Glass windows
• Attachments (signs, antennae,etc)
• Ornaments
• Canopies
• Railings
• Doors and exit routes

• Medical equipment
• Industrial equipment
• Supplies
• Office equipment

• Medical and industrial gases
• Air conditioning
• Electrical generator
• Hydraulic networks
• Electric networks

3
Nonstructural vulnerability assessment methods

• Previous experience
• Visual inspection
• Data collection
• Non-destructive tests
• Mathematical models
• Structural analysis and design
• Wind tunnel analysis
• Retrofitting recommendations
• Equipment classification

4
Standards and codes must cover components and
claddings
The trend for international standards is to adopt
and adapt the ASCE-7 approach for components and
claddings.
5
Design pressure for components and cladding and
design force for special and open structures
(ASCE-7)
Design pressure
Design force
6
Criteria for equipment classification
Indispensable Equipment that can not easily or
economically be replaced and is essential for the
provision of health services. Essential Similar
to indispensable equipment, except that it can
be replaced easily or cheaply. Hazardous Equipmen
t that can injure people and damage
objects. Chaotic Equipment whose failure may
cause disruption to its environs. Functional Eq
uipment that is not used for emergency health
care.
7
Hipped roof recommended over flat roof
8
Gabled roof with slopes of 20 to 30 degrees are
preferred against hurricanes
Hatched area indicates
where more frequent
fixings are required
PLAN
ISOMETRIC
Gabled roof
9
Connection details between metal sheet roof and
purlins
10
Typical connection system between metal sheet
roof and masonry wall