Mechanical characteristics and deformation calculation of steel diagrid structures in high-rise buildings. (October 2021)

• Record Type: Journal Article
• Authors: Fang, Dengjia; Liu, Chengqing
• Is Part Of: Journal of building engineering. Volume 42(2021)
• Publication Date: 2021-10
• Subjects: High-rise buildings -- Diagrid structures -- Polygon plane -- Structural deformation -- Equivalent stiffness; Building -- Periodicals; 690.05
• DOI: 10.1016/j.jobe.2021.103062
• Languages: English
• ISSNs: 2352-7102

Abstract

Abstract: In order to propose a simple and practical methodology for calculating the deformation of diagrid structure with polygon plane in arbitrary direction, the diagrid structure is considered to be mainly composed of "element" by geometric method. The vertical stiffness and lateral stiffness of diagrid structure with arbitrary polygon plane under vertical load and horizontal load are derived respectively. The corresponding laboratory test and numerical simulation analysis are carried out through the scale models of steel diagrid structures. The analysis results show that the calculated results of each deformation equation are in good agreement with the test results and numerical simulation results. In addition, the influence of the parameters on the stiffness of the structure is revealed theoretically. The results demonstrate that when the diagonal angle is about 55°, the variation of the diagonal angle has the greatest effect on the vertical stiffness of the diagrid structure. Moreover, the vertical stiffness of steel diagrid structure is smaller than that of traditional structure, and the vertical displacement is obviously larger. It is necessary to limit the inter-story drift ratio of vertical modules. Furthermore, current paper theoretically explains that the more edges of diagrid structure, the greater the horizontal shear stiffness of the structure. Highlights: Stiffness of diagrid structure with arbitrary polygon plane is derived. Limit index of vertical displacement of steel diagrid structure is proposed. Equivalent lateral stiffness equation of diagrid structure is recommended.