IJIRST (International Journal for Innovative Research in Science & Technology)ISSN (online) : 2349-6010

 International Journal for Innovative Research in Science & Technology

Analysis of Diagrid Structural System


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International Journal for Innovative Research in Science & Technology
Volume 6 Issue - 1
Year of Publication : 2019
Authors : Akash Malik

BibTeX:

@article{IJIRSTV6I1007,
     title={Analysis of Diagrid Structural System},
     author={Akash Malik},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={6},
     number={1},
     pages={5--8},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV6I1007.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}



Abstract:

As in modern era population of metropolitan cities increased very rapidly. Due to which construction of high rise buildings is justified. High rise buildings require advance technologies in terms of structural material, vertical transportation and structural system. Mud bricks are used as structural material from ancient period. In late 19th century cast iron replace mud bricks. Structural material has developed from cast iron to reinforced concrete and steel to increase available strength. With the advancement, several types of structural system like framed structure, braced frames, shear wall, tubular structure, outrigger and diagrid were developed for high rise buildings which are the major requirement to accommodate large population of metropolitan cities. In the present study one of such structural system i.e. diagrid structural system has been studied. The high rise building having 40 storey with diagrid structural system with corner columns and without corner columns has been analysied in the present study. The objective of the study was to get the best configuration of diagrid structural system. Structural system is an important factor in the construction of high rise buildings. The aim of structural system is to transfer loads to ground efficiently. Lateral loads are dominating over gravity loads in high rise building. Hence structural system with high rigidity is required. Structural designers mainly increase the volume of structural components to increase the rigidity of structure, which reduces the usable floor area, increase dead loads and increase the cost of construction. Structural designers can reduce the volume of structural components for a required rigidity by using efficient structural system. Presently the Framed, tubular, space truss, super frame structural systems are used to construct high rise buildings. Nowadays a new system named diagrid system has been adopted as a replacement of framed structure. In diagrid system the diagonal members are designed as tress element. Diagrid structural system in unique as it resist lateral load by its axial action. Efficiency of diagrid structural system mainly depends upon angle of diagrid. In the present study the diagrid model with corner column and without corner column at various angles have been studied to find a better configuration. The analysis of diagrid structural system with corner columns and without corner columns was carried out by modeling a 40 storey building in SAP2000 at angles 30.96°, 50.19°, 60.95°, 67.38°,71.57° and 80.54° in terms of first time mode period and top storey displacement in the present study. A regular floor plan of 36m x 36m size with four inner columns at a distance of 12m from outer periphery is considered. SAP-2000 software is used for modeling and analysis. All structural members are designed as per IS 800:2007. Wind load is considered as per IS 875 (part III) for analysis of structure. From the analysis the first time mode period and top story displacement of building with corner column and without corner column has been optimized as 50° to 67° and 60° to 71° respectively. From the study, it was concluded that diagrid structural system with corner columns is better than diagrid structural system without corner columns.


Keywords:

High Rise Building, SAP2000, Diagrid Structure


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