Structural Efficiency of Tall Buildings by Means of Parametric Generative Design

Pooyan Kazemi
MS.c in Architectural Technology
Shahid Beheshti University, Tehran

Recently, it is noticed that cooperation between engineers and architects in the design process has faded, specifically in tall building design procedures. While "Architectural form" straightly affects building's structural behavior, inadequate considerations on "schematic design process" would negatively reduce structural efficiency. This presentation is a part of an ongoing research that its main purpose is to address structural behavior in the architectural form in tall buildings design process.
To start out with, explored potential 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 are further generated trough ascending from base plan to top according to Curvilinear and Morph vertical transformations by means of Generative design. Subsequently, a Steel Tubular DiaGrid structure was generated and mapped on the architectural form. Due to abundant models, a linear static parametric structural analysis was done after determinations and application of lateral loads. For the sake of comparison, all generated forms and structures follow the same parametric design process with highly similar specifications.
Finally, all models were subject to comparison through factors indicating structural efficiency that had been used in similar researches such as Drift Ratio, Total mass etc. Also, a novel structural efficiency factor is introduced as "expected design weight” that represents the expected designed weight of the structural members of the building without going through a structural element design process. This factor can be used as an indication of the cost of the building structure for similar construction techniques in parametric design environments.