Free-form External Design using BIM and Development of Grasshopper Model

  • Authors

    • Sangchul Kim
    • Shinjo Eom
    https://doi.org/10.14419/ijet.v7i3.24.22525
  • Free-form building, external panel, BIM, Grasshopper, non-linear
  • Background/Objectives: Recently, the number of free-form buildings using BIM(building information modeling) technology is increasing, but it is difficult to design and manufacture non-linear external panels of free-form buildings.

    Methods/Statistical analysis: In this study, the research team will develop the technology for easily creating non-linear surface panels using BIM, develop a scalable 3D external design process based on grasshopper module, and validate the engineering feasibility through simulation. The methods for making grasshopper modules are based on optimization techniques, algorithms, analysis of existing cladding panel technology, and analysis of existing fabrication methods

    Findings: In order to develop grasshopper model, the first step is generating the optimization algorithm. To find the algorithm, we considered three alternatives, 1) the method of extracting and utilizing the coordinate point in the initial design of Grasshopper and applying the minimum interval to the concept mass of Revit while keeping the original plan, 2) Designing the design through connection of the minimum interval (coordinate point) of the interval on the U. V grid in the concept mass stage using Revit in the early stage, and 3) It is a plan to utilize Dynamo. Then, based on three options, 1) and 2) were combined to develop the technology. And the validation of proposed technology was performed between existing fabrication methods and the proposed methods by 4 major categories.- accuracy, waste reduction, optimization, and congruity. In all aspects, the proposed method was exceeded over the level of existing technique.

    Improvements/Applications: The research team developed a design process that can produce exterior panels of free-form buildings through optimization, algorithm, and Grasshopper. The results are applicable to all areas of construction.

     

     

  • References

    1. [1] Ku K, Pollalis S, Fischer M, Shelden D. 3D model-based collaboration in design development and construction of complex shaped buildings. Journal of Information Technology in Construction. 2008;13:458-485.

      [2] Iyengar H, Sinn R, Zils J. Unique Steel Structures in Spain: The Guggenheim Museum Bilbao and the Hotel Arts, Barcelona. Journal of Constructional Steel Research. 1998;46:10-11.

      [3] Cohen-Steiner D, Alliez P, Desbrun M. Variational shape approximation. ACM Transactions on Graphics. 2004;23(3):905-914. DOI:10.1145/1186562.1015817

      [4] Grobman YJ, Yezioro A, Capeluto IG. Non-Linear Architectural Design Process. International Journal of Architectural Computing.2010 Jan;8(1):41-53.

      [5] Lawson B. How Designers Think:The Design Process Demystified. Oxford: Architectural Press; 1997.

      [6] Rowe PG. Design Thinking. Cambridge: MIT Press; 1987.

      [7] Alexander C. Notes on the Synthesis of Form. Cambridge: Harvard University Press; 1964.

      [8] Meek DS, Walton DJ. Approximation of discrete data by G1 arc spline. Computer-Aided Design. 1992;23(10):301-306.DOI:10.1016/0010-4485(92)90047-E

      [9] Branco JNR. Soares CG.Mapping of shell plates of double curvature into plane surface. Journal of Ship Production. 2005;21(4):248-257.

      [10] Liu Y. Pottmann H.Wallner J. Yang YL. Wang W.Geometric modeling with conical meshes and developable surfaces. ACM 52 Transactions on Graphics. 2006;25(3):681-689.

      [11] Aumann G. Degree elevation and developable B´ezier surfaces. Computer Aided Geometric Design. 2004;21:661-670

  • Downloads

  • How to Cite

    Kim, S., & Eom, S. (2018). Free-form External Design using BIM and Development of Grasshopper Model. International Journal of Engineering & Technology, 7(3.24), 146-152. https://doi.org/10.14419/ijet.v7i3.24.22525