Open Access
N.M. Potdar
S.S. Jamkar
- Post Graduate Student Government College of Engineering Aurangabad, Maharashtra India
- Professor Government College of Engineering Aurangabad, Maharashtra India
Abstract
Lateral loads are critical in the design of high-rise structures. The buildings need to have high stiffness and must be able to resist lateral deformations and torsional rotations without having discomfort to the user. Diagrid structural system is one of the systems used in resisting lateral forces. In this study, diagrid geometry is generated using the ‘Golden Ratio’ concept and used to model 40, 50, and 60 story structures. Two more diagrid schemes are modeled to compare the results. The diagrid members are designed, and optimized sections are provided by performing iterations with different values of ‘s’ which is the ratio of lateral displacement at the top due to bending and due to shear, and a constant ‘α’. The structural performance of the proposed diagrid system is represented in terms of the time period, lateral stiffness, and drift ratio. The non-linear behavior of diagrids is studied by performing pushover analysis up to the point when one or more members reach a collapsed state. Proposed diagrid geometry shows better results than the other two diagrid schemes. Concluding remarks have been made regarding diagrid geometry, the design of diagrid members, the effectiveness of the golden ratio in diagrid geometry, and the non-linear behavior of diagrids.
Keywords: Golden ratio, Diagrid structures, Drift ratio, Lateral stiffness, Non-linear analysis, Material non-linearity
References
1. C. Liu, K. Ma. Calculation Model of the Lateral Stiffness of High Rise Diagrid Tube Structures Based on the Modular Method. The Structural Design of Tall and Special Buildings. 2016; 26 (4).
2. K. Jani, P. V. Patel. Analysis and Design of Diagrid System for High Rise Steel Buildings. Procedia Engineering. 2013; 51: 92-100p.
3. K. D. Jani, P. V. Patel. Design of Diagrid Structural System for High Rise Steel Buildings as per Indian Standards. Structures Congress. 2013; 1070-1081p.
4. M. M. Ali, K. S. Moon. Structural Developments in Tall Buildings: Current Trends and Future Prospects. Architectural Science Review. 2011; 50 (3): 205-223p.
5. N. Mashhadiali, A. Kheyroddin. Proposing the Hexagrid System as a New Structural System for Tall Buildings. The Structural Design of Tall and Special Building. 2012; 22: 1310-1329p.
6. G. Lacidogna, D. Scaramozzino, A. Carpinteri. Influence of the Geometrical Shape on the Structural Behaviour of Diagrid Tall Buildings Under Lateral and Torque Actions. Developments in Built Environment. 2020; 2.
7. F. Zhao, C. Zhang. Diagonal Arrangements of Diagrid Tube Structures for Preliminary Design. The Structural Design of Tall and Special Buildings.2015; 24:159-175p.
8. E. Asadi, H. Adeli. Diagrid: An Innovative, Sustainable and Efficient Structural System. The Structural Design of Tall and Special Buildings. 2016; 26.
9. G. M. Montuori, E. Mele, G. Brandonisio, A. D. Luca. Secondary Bracing System for Diagrid Structures in Tall Buildings. The Structural Design for Tall and Special Buildings. 2014; 75: 477-488p.
10. S. Sadeghi, F. R. Rofooei. Improving the Seismic Performance of Diagrid Structures Using Buckling Restrained Braces. Journal of Constructional Steel Research. 2020; 166.
11. K. S. Moon. Diagrid Structures for Complex-Shaped Tall Buildings. Procedia Engineering. 2011; 14: 1343-1350p.
12. K. S. Moon. Optimal Grid Geometry of Diagrid Structures for Tall Buildings. Architectural Science Review. 2011; 51 (3): 239-251p.
13. G. Lacidogna, G. Nitti, D. Scaramozzino, A. Carpinteri. Diagrid Systems Coupled with Closed- and Open-Section Shear Walls: Optimization of Geometrical Characteristics in Tall Buildings. Procedia Manufacturing. 2020; 44: 402-409p.
14. K. S. Moon, J. J. Connor, J. E. Fernandez. Diagrid Structural System for Tall Buildings: Characteristics and Methodologies for Preliminary Design. The Structural Design of Tall and Special Buildings. 2007; 16: 205-230p.
15. G. M. Montuori, E. Mele, G. Brandonisio, A. D. Luca. Design Criteria for Tall Buildings: Stiffness versus Strength. The Structural Design of Tall and Special Buildings. 2013; 23: 1294-1314p.
16. E. Asadi, H. Adeli. Non-linear behavior and design of Mid-to-Highrise diagrid structures in seismic regions. Engineering Journal; 2018.
17. C. Falbo. The Golden Ratio – A contrary Viewpoint. The College Mathematics Journal. 2005; 36 (2): 123-134p.
18. Indian Standard. Code of Practice for Design Loads (Other than Earthquake) for Buildings and Structures-Dead Loads. New Delhi: Bureau of Indian Standards; 1987.
19. Indian Standard. Code of Practice for Design Loads (other than earthquake) for Buildings and Structures-Wind Loads. New Delhi: Bureau of Indian Standards; 1987.
20. Indian Standard. Criteria for Earthquake Resistant Design of Structures- General Provisions and Buildings. New Delhi: Bureau of Indian Standards; 2002.
21. SAP 2000 Ultimate v16.0.0. CSi America. New York; 2021.
22. AMERICAN SOCIETY OF CIVIL ENGINEERS. Prestandard and Commentary for The Seismic Rehabilitation of Buildings. Washington, D.C.: Federal Emergency Management Agency; November 2000.
23. Applied Technology Council (ATC-55 Project). Improvement of Non-Linear Static Seismic Analysis Procedures. Washington, D.C.: Federal Emergency Management Agency; June 2005.
Journal of Construction Engineering, Technology & Management
| Volume | |
| Received | July 25, 2021 |
| Accepted | August 21, 2021 |
| Published | January 21, 2023 |