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Example nomogram for earthquake vulnerability and damage assessment using vulnerability index approach

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posted on 21.02.2020 by John Douglas
An example nomogram for use firstly (left-hand side of the diagram) to assess the vulnerability of a masonry building to earthquake ground motions using the RISK-UE level 1 approach (only some of the vulnerability modifiers are included) and then to use the assessed vulnerability index and the expected earthquake macroseismic intensity to estimate the expected damage distribution in terms of the EMS98 damage scale. Details of the Level 1 approach are given in Milutinovic and Trendafiloski (2003).

An example is shown using an isopleth (dashed blue line) for a medium height M3.2 type building (Masonry vaults) that is badly maintained undergoing an earthquake of macroseismic intensity (EMS98) VII (7). The distribution of damage states is shown by the column of the stacked bar-chart on the right-hand side that is intersected by the vertical blue dashed line.

The left-hand side of the diagram is a type 3 nomogram produced using the pynomo software, whereas the right-hand side is a normal graph underlaid by a binomial distribution.

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