A model for determining the space efficiency in non-orthogonal high rise office buildings

Abstract

The study aims to create a model that gives the space efficiency value for non-orthogonal high-rise buildings. Fifteen criteria affecting the space efficiency were determined and examined on eleven non-orthogonal highrise buildings. By examining the criteria on the cases, sixty sub-criteria and weight percentages of the sub-criteria were created. To determine the relative importance of the criteria, 30 people specializing in high-rise buildings were asked to rate the criteria, and the data were analyzed by the analytical hierarchy process. The total score was calculated by multiplying the importance coefficient for each criterion and the weight percentages of the sub-criteria using simple additive weighting. It was found that the non-orthogonal form with the highest space efficiency was pyramidal, and the lowest was the free form. However, while the building form was found to be that most affected the efficiency, it was seen that the criteria of distance from floor-to-floor height and floor-to-ceiling height was the criterion that affected the efficiency the least. The model allows investors, architects, and real estate appraisers to make predictions about the building at the preliminary design stage. In addition, it offers practical calculations about how much the efficiency will change with the change of the sub-criteria.