Semi-Automatic calculation of the stability of shear walls in multi-storey buildings

Abstract: Performing horizontal stability analysis in the conceptual design phase is time consuming and adjustments in the geometry of the building require new time consuming calculations. Often buildings are modelled in 3D modelling software such as Revit and Tekla but the calculations are often performed in a separate software. A script in Dynamo (add-in to Revit) has been designed that manages to gather geometric data and material data from the Revit model and automatically performs horizontal stability calculations for the stabilising system of a concrete building. The purpose of the script is to easily design the stabilising system based on the results of the overturning capacity of the shear walls based on analytical equations. The Dynamo script performs calculations for buildings that are stabilised with shear walls in ULS with load case EQU 6.10$^5$ (SS-EN 1990). EQU includes both symmetric and asymmetric wind load (over the width of the building) and varying wind load over the height of the building according to Eurocode and EKS11. Imperfection loads are also included. The Dynamo script presents the result of the overturning moment and stabilising moment in a bar chart for the different shear walls. The user can adjust the shear walls (thickness, location, length) in the Revit model and then run the Dynamo script again to see if the overturning moment exceeds the stabilising moment.