Direct Displacement Control of Deformed Double Layer Dome

  • Shna Jabar Abdulkarim Department of Civil Engineering, University of Raparin, Rania, Sulaymaniyah, Kurdistan Region-F.R. Iraq http://orcid.org/0000-0001-6969-4889
  • Najmadeen Mohammed Saeed Department of Civil Engineering, University of Raparin, Rania, Sulaymaniyah, Kurdistan Region-F.R. Iraq http://orcid.org/0000-0001-7074-0256
  • Hawkar Ali Haji Department of Civil Engineering, University of Raparin, Rania, Sulaymaniyah, Kurdistan Region-F.R. Iraq http://orcid.org/0000-0002-0703-4874
Keywords: Force method, Actuation, Shape restoration, Displacement control, Double layer dome.

Abstract

Space structures such as double layer dome is light and active structural system that used for various structural application, for instance structural covers large areas such as exhibition halls, stadium and concert halls. They are aesthetically pleasing in appearance as well as the architectural requirement, in which tolerances of structural shape under changing service conditions are very significant, which high appearance accuracy is requested in some applications. Due to many reasons such as loading, these type of structures may suffer from a noticeable deflection, which leads to a significant potential undesired appearance of the shape. In this situation, the displacements may need to be reduced or eliminated. In this study, by applying the shape adjustment technique that its scheme is depend on the linear force method, shape restoration is performed to the double layer dome model in three different cases corresponding to the directions of loadings were considered. The improvement of controlling nodal displacement can be achieved through using a rather simple and direct method, due to calculating necessary length of actuators by applying a single formulation. It is found that if the number of provided actuators are satisfactory, controlling of all the displaced joints could be performed by a very small percentage of discrepancy, even if the controlled joints connection is not direct with the adjustable members. The technique of shape adjustment is very efficient for double layer dome model, and it can roughly eliminate the displacement of definite joints (Exterior joints only) by simply changing the length of certain bars by eo amount

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Author Biographies

Shna Jabar Abdulkarim, Department of Civil Engineering, University of Raparin, Rania, Sulaymaniyah, Kurdistan Region-F.R. Iraq

Ms. Shna Jabar is currently an Assistant Lecturer at the Department of Civil Engineering, University of Raparin, Rania, Sulaymaniyah, Kurdistan Region-F.R. Iraq.

 

Najmadeen Mohammed Saeed, Department of Civil Engineering, University of Raparin, Rania, Sulaymaniyah, Kurdistan Region-F.R. Iraq

Asst. Prof. Dr. Najmadeen Mohammed Saeed

PhD Civil Engineering\ Structures School of Engineering United Kingdom 2015-04-22 Master Building Construction Engineering\ Structures College of Engineering/ Building Construction Department Kurdistan Region/ Iraq 2010-04-20 Bachelor Building Construction Engineering College of Engineering/ Building Construction Department Kurdistan Region/ Iraq 2002-07-04
Hawkar Ali Haji, Department of Civil Engineering, University of Raparin, Rania, Sulaymaniyah, Kurdistan Region-F.R. Iraq

Mr. Hawkar Ali is currently holding the position of Assistant Lecturer at the Department of Civil Engineering, University of Raparin, Rania, Sulaymaniyah, Kurdistan Region-F.R. Iraq. 

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Published
2020-06-30
How to Cite
Abdulkarim, S., Saeed, N., & Haji, H. (2020, June 30). Direct Displacement Control of Deformed Double Layer Dome. UKH Journal of Science and Engineering, 4(1), 1-14. https://doi.org/https://doi.org/10.25079/ukhjse.v4n1y2020.pp1-14
Section
Research Articles