Achieving Structural Efficiency of Tall Buildings by Means of Parametric Generative Design

Pooyan Kazemi
MS, Architectural Technology
Shahid Beheshti University, Tehran

While architectural form directly affects a building's structural behavior, inadequate considerations of the schematic design process can reduce structural efficiency. This presentation is a part of an ongoing research program that addresses structural behavior in the architectural form during skyscraper design.

First, potentially explorable forms were parametrically generated, based on previous research on form generation for tall buildings, consisting of regular geometries in symmetric axial, top, and base floor plans. Overall forms were further generated by ascending from the base plan to the top, according to curvilinear and morph vertical transformations, through generative design. A tubular steel diagrid structure was generated and mapped on the architectural form. Due to the abundance of models, a linear static parametric structural analysis was done after lateral loads were determined and applied. For the sake of comparison, all generated forms and structures follow the same parametric design process with similar specifications. Finally, all models were compared through factors indicating structural efficiency that had been used in similar research, such as drift ratio, total mass, etc. Also, a novel structural efficiency factor is introduced as an "expected design weight,” representing the expected designed weight of the structural members of the building without going through structural element design. This factor can be used as an indication of the cost of the building structure for similar construction techniques in parametric design environments.