Glossary
- connection
- models a physical structural connection that will bear a simulated load and when broken cause load to be distributed and generate damage outcomes.
- connection type
- a collection of connections sharing the same strength and dead load statistical characteristics and costing area
- connection group, connection type group
- a collection of connection types sharing the same load distribution and costing scenario
- coverage
- a component making up the wall part of the envelope of the model
- \(C_{pe}\)
- external pressure coefficient
- \(C_{pe,str}\)
- external pressure coefficient for zone component related to rafter
- \(C_{pe,eave}\)
- external pressure coefficient for zone component related to eave
- \(C_{pi}\)
- internal pressure coefficient
- \(C_{pi,\alpha}\)
- proportion of the zone’s area to which internal pressure is applied
- CV
- coefficient of variation, the ratio of the standard deviation to the mean
- damage index
- The total cost of repairing the building fabric of a group of buildings exposed to severe natural hazard divided by the total cost of fully rebuilding the same assets in the existing locality to current local building regulations.
- differential shielding
- incremental adjustments to be applied to envelope surface pressures to account for different degrees of shielding between envelope surfaces on a single shielded structure.
- fragility, fragility function, fragility curve
- Fragility describes the probability of discrete damage states for a specific
hazard. Fragility function or curve is referred to a damage model which describes the likelihood of a building of a particular type being damaged to a defined degree for a given level of natural hazard exposure.
- influence coefficient
- coefficient relating a connection to either zone or connection with regard to load distribution
- \(K_{c}\)
- action combination factor. This factor is devised to reduce wind pressure when wind pressures from more than one building surfaces, for example walls and roof, contribute significantly to a peak load effect.
- \(M_{s}\)
- shielding multiplier. This multiplier represents the reduction in peak 3-second gust velocity at a given height and terrain, caused by the presence of buildings and other obstructions upwind of the site of interest.
- \(M_{z,cat}\)
- terrain height multiplier
- patch
- a set of revised influence coefficients for a connection
- \(q_{z}\)
- free stream wind pressure
- vulnerability, vulnerability function, vulnerability curve
- A damage model, or curve, which describes the average severity of physical economic loss to a group of buildings of a particular type in terms of a damage index with increasing natural hazard exposure.
- zone
- an area of building envelope on which wind pressure acts. Zone is linked with connection with influence coefficient so the wind pressure is transformed to wind load on a connection.