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Disaster Mitigation in Health Facilities: Wind Effects Nonstructural Issues

Disaster Mitigation in Health Facilities: Wind Effects Nonstructural Issues. Nonstructural elements to consider when assessing vulnerability. ARCHITECTURAL. EQUIPMENT. BASIC INSTALLATIONS. Fa ç ades Roof covers Parapets Chimneys Plaster Glass windows

claudia-schneider
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Disaster Mitigation in Health Facilities: Wind Effects Nonstructural Issues

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  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. p = qh [(GCp) - (GCpi)] F = qzGCf Af Towers, signs, tanks, silos 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: Equipment that can injure people and damage objects. Chaotic: Equipment whose failure may cause disruption to its environs. Functional: Equipment 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. Self-tapping screw Metal sheeting Spacer block Rafter purlin Galvanized hurricane strap fixed to rafter and purlin Ridge connection Valley connection Metal sheet fixings and purlin-to-rafter connection Connection details between metal sheet roof and purlins

  10. Typical connection system between metal sheet roof and masonry wall

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