| θ | Interstory drift sensitivity coefficient |
| Ptot | Total gravity load at and above the story considered in the seismic design situation |
| dr | Design interstorey drift, evaluated as the difference of the average lateral displacements ds at the top and bottom of the storey under consideration; for this, the displacement is determined by using the linear design response spectrum with q = 1.0. |
| Vtot | Total seismic storey shear determined by using the linear design response spectrum |
| h | Story height |
Sensitivity Coefficient θ
Calculation formula for an interstory drift sensitivity coefficient
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