International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
Parametric Study on Influence of DIAGRID Angles On Seismic Parameters Of Multi-Storey Circular Shaped Building Poornima D1, Guruprasad T.N2 1P
G Student, Computer Aided Design of structures, Shridevi Institute of Engineering and Technology, Tumakuru, Karnataka, India 2Assistant Professor, Department of Civil Engineering, shridevi Institute of Engineering and Technology, Tumakuru, Karnataka, India ---------------------------------------------------------------------***-------------------------------------------------------------------recognized very easily. The main objective of using Diagrid Abstract: Advanced structural elements, materials and
system is to remove the number of vertical columns. The vertical columns carry the gravity loads and are not capable of resisting lateral load. The Diagrids carry the gravity loads and it gives lateral stability due to its triangular configuration of the structure. The Diagrid system also saves 20% of the structural steel compared to conventional framed structure.
methodology are considered for the analysis and design which leads to the development of tall buildings. Tall structures are raised due to lack of construction areas, which also provides the land for vegetation purposes. Tall structures are susceptible to failure under lateral loads like seismic loads and wind loads. Lateral load resistance of structure is provided by interior structural system or exterior structural system. Usually braced frame and shear wall and their combination refer to interior system. In the other hand Diagrid, framed tubes are provided at the periphery of the structure. In modern days Diagrid system is adopted in tall buildings due to its efficiency and flexibility. Provision of Diagrid to tall buildings, reduces the steel when compared to the conventional buildings. The present work is concerned with considering circular shape plan having 23 storey building, along with Diagrid are used. The Diagrid are provided with angles. In this work seismic analysis is carried out using ETABS v9.7 software to determine the structural parameters like storey displacement, storey drift, Time period and base shear.
2. OBJECTIVE OF THE STUDY:
3. METHODOLOGY 3.1 Analysis of 23 storey Circular Diagrid building
Keywords: Diagrid, ETABS, Storey displacement, storey drift, Base shear, Time Period
Following data are considered in the modeling of the structure.
1. INTRODUCTION
1) 23 storey building having circular shape with 40m diameter. The total height of the building is 82.8m with 3.6m height of each storey is taken. 2) Size of Diagrid is taken as 350mm pipe section with 25mm thickness. 3) The diagrid angle of 66.43o, 73.78o and 80.1o will be taken. 4) ISMB 550 is taken for the size of beam, and 700mm circular column will be considered. 5) The characteristic strength of concrete is taken as 25N/mm2 and characteristic strength of steel will be taken as 415N/mm2. 6) The yield stress of steel is taken as 250N/mm2 and ultimate tensile strength is taken as 420N/mm2. 7) The dead load is taken as 5.5KN/m2 on terrace level and 4KN/m2 on floor level. The live load is taken as 1.5KN/m2 on terrace level and 4KN/m2 on floor level.
Now a days the rapid growth of urban population, scarcity and high cost of available land influence the construction industries. So that the construction of high rise structures are preferable. Lateral stiffness is very much important for a tall building. Lateral load consideration is very much important when the height of the structure increases. For that reason lateral load resisting system has become much importance than structural system that resists the gravity loads. Now a day’s Diagrid, diagonal grid system is used for high rise buildings due to its structural efficiency and aesthetic look provided by its geometric configuration. Here structural efficiency means, it decreases the number of interior columns. Therefore it provides more flexibility to the design. In recent days conventional framed structures are losing interest because of new and different aesthetic look provided by diagonal systems and also they gives good appearance and
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Analysis of Diagrid structure for different angle of Diagrid by varying the Seismic zones. Study the Maximum storey displacement, storey drift, Base shear and Time period to show the behavior of the structure under Earthquake loading.
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