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Design of landmark pedestrian urban bridge with evolutionary topology optimization

Soroush, H ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.5176/2301-394X_ACE19.546
  3. Publisher: Global Science and Technology Forum , 2019
  4. Abstract:
  5. one of the important issues of construction industry today, is providing a meaningful interconnectivity between Architecture and its technical and technological aspects. In construction projects aesthetic and form is habitually crucial for the architect while structural designers aim for efficiency and stability of the structure. This research is concerned with the design of an urban footbridge located in Tehran-Iran with social and cultural spaces in which the form of the bridge is obtained by the use of topology optimization process. The objective of this study is to investigate the utilization of topology optimization process in architecture in order to achieve a beneficial design framework for both architectural and structural engineers. As first step, site analysis, connectivity and access diagrams and physical planning of the project is presented to provide the planar schematization of the project, along with a brief review associated with application of topology optimization process and its applications in architecture. Further on, primary planar design of the bridge is introduced as input to a general purpose Finite Element Analysis software, subject to stress analysis for various combinations of boundary conditions such as bridge supports and loading regions. Structural form-finding algorithm is then used to obtain the 3-dimentional structurally optimized chassis of the bridge. Algorithms used in this research are based on Evolutionary Structural Optimization (ESO) with objective functions to either minimization of volume and consequently weight of the structure while maximization its stiffness. Following several variations and comparison of altering forms and with regard to architectural requirements of the project, the more appropriate forms were chosen. In addition to architectural and structural efficiency, these forms are optimized with respect to both structural volume and consumable material to have the maximum stiffness. As topology optimization method is a solution for form development based on structural efficiency, an effective relation could be built between structure and architecture. In recent years, this method is introduced to the field of architecture and possesses capacities for more development in the close future. Furthermore, this paper describes the design steps of an architectural space through topology optimization method to whom interested in this field of study. And by investigating the effect of different approaches of ISO algorithms and varying input parameters better understanding of topology optimization processes is achievable for those interested in implementing these techniques within their schematic architectural design process
  6. Keywords:
  7. Evolutionary Structural Optimization ; Form-Finding ; Structural Shematic Design ; Topology Optimization
  8. Source: 7th Annual International Conference on Architecture and Civil Engineering, ACE 2019, 27 May 2019 through 28 May 2019 ; 2019 , Pages 100-120 ; 2301394X (ISSN)