Azmat Zahera S. A.,
S. A. Bhalchandra,
- Student Department of Applied Mechanics, Government College of Engineering, Chh.Sambhajinagar (Aurangabad), Maharashtra, India
- Professor Department of Applied Mechanics, Government College of Engineering, Chh.Sambhajinagar (Aurangabad), Maharashtra, India
Abstract
The seismic performance of a structure is a fundamental and vital aspect of structural engineering, carrying significant importance in ensuring safety and stability. This study investigates the dynamic behavior of structures employing waffle slab designs with and without drops and beams, focusing on varying panel sizes. Commercial buildings, each comprising 12 stories with heights of 3.5 meters, were analyzed using the Response Spectrum Method in seismic Zone III, utilizing ETABS Software. Parameters such as lateral displacement, story shear, story drift, and overturning moment were assessed across different seismic zones. The analysis revealed that waffle slab designs consistently reduce displacement, with waffle slabs featuring beams showing a significant reduction of approximately 67.48% at an 8-meter span compared to those without drops and beams. Waffle slabs with drops generally decrease story shear, while waffle slabs with beams tend to increase it. Overall, waffle slab designs incorporating beams demonstrate superior performance in terms of displacement reduction and story shear across all span lengths, indicating their effectiveness in enhancing structural performance and stability. Hence, structures utilizing waffle slabs with beams can be deemed more efficient in meeting structural requirements compared to those employing waffle slabs with drops or without drops and beams.
Keywords: Dynamic Analysis, Waffle Slab, Drop Panels, Beams, Response Spectrum Method, Multi-story Structures, Comparative Study
[This article belongs to Recent Trends in Civil Engineering & Technology(rtcet)]
References
1. Nabil F. Grace and John B. Kennedy, “Dynamic Characteristics Of Prestressed Waffle Slabs”, ASCE, Journal of Structural Engineering, Volume 116, June 1, 1990, pp.1547-1564.
2. Mario E. Rodriguez, Sergio Santiago, and Roberto, “Seismic Load Tests On Two-Story Waffle-Flat-Plate Structure”, ASCE, Journal of Structural Engineering, Volume 121, September 1, 1995, pp.1287-1293.
3. Edward S. Hoffman, David P. Gustafson, Albert J. Gouwens “Two-Way (Waffle) Flat Slab Design”, Springer Nature, Journal of Structural Design Guide to the ACI Building Code, Volume 23, June 2, 1998, pp.178–202.
4. Hashim M. S., Abdul-Wahab and Mohammad H. Khalil, “Rigidity And Strength Of Orthotropic Reinforced Concrete Waffle Slabs”, ASCE, Journal of Structural Engineering, Volume 126, February 1, 2000, pp.219- 227.
5. Khalid M. Mosalam and Clay J. Naito, “Seismic Evaluation of Gravity-Load-Designed Column-Grid System”, ASCE, Journal of Structural Engineering, Volume 128, February 1, 2002, pp.160-168.
6. Benavent-Climenta , X. Cahıs , A. Catalan, “Seismic behavior of interior connections in existing waffle-flat- plate structures”, ELSEVIER, Journal of Engineering Structure, Volume 30, March 25, 2008, pp.2510-2516.
7. Ahmed Ibrahim, Hani Salim, Hamdy Shehab Eldin, “Analysis of Waffle Slabs with and without Openings”, ASCE, Journal of Structural Engineering, Volume 2, April 26, 2012, pp.2599-2605.
8. Jianguo Nie, Xiaowei Ma, A.M. and Lingyan Wen, “Experimental and Numerical Investigation of Steel- Concrete Composite Waffle Slab Behavior”, ASCE, Journal of Structural Engineering, Volume 141, February 17, 2015, pp.143-147.
9. Ali Alraie, Manoranjan Barik, “Effect of continuity on reduction factors of bending moments and shear forces in grid slabs”, ELSEVIER, Journal of Building Engineering, Volume 13, September 23, 2017, pp.291- 297.
10. Latha M.S., Pratibha K., “Analysis and comparison of conventional slab and grid slab for symmetric and asymmetric structures”, ELSEVIER, Journal of Structural Engineering, Volume 46, June 23, 2020, pp.1860- 1869.
11. CH. Lokesh Nishanth, Y. Sai Swaroop, Durga Chaitanya Kumar Jagarapu, Pavan Kumar Jogi, “Analysis and design of commercial building with different slab arrangements using ETABS”, ELSEVIER, Journal of Structural Engineering, Volume 33, April 6, 2020, pp.700-704.
12. Rameshwaran P.M. ,Nithyambigai G., Stella Mary F., “Behaviour of Waffle Slab”, ELSEVIER, Journal for Structural Engineering Research Frontiers, Volume 46, Issue 9, November 19, 2020, pp.3765-3768.
13. Seung Hyeong Lee, Byung Kwan Oh, Jewoo Choi, Do Hun Hong, Taehoon Hong, Dong-Eun Lee, Hyo Seon Park, “Eco-friendly and economically optimal design model (EEODM) to reduce the CO2 emissions and the cost of long-span waffle slabs”, ELSEVIER, Journal of Cleaner Production, Volume 296, May 10, 2021, pp.1263-1267.
14. Charles Besjak, Preetam Biswas, Alexandra Thewis, Raymond Sweeney, Damayanti Chaudhuri, “Chhatrapati Shivaji International Airport—Integrated Terminal Building”, Taylors & Fransics, Journal of Structural Engineering, Volume 23, March 2023, 2018, pp.08-13.
15. B. Teodosio, P.L.P. Wasantha,E. Yaghoubi, M. Guerrieri, S. Fragomeni, R. van Staden “Environmental, economic, and serviceability attributes of residential foundation slabs: A comparison between waffle and stiffened rafts using multi-output deep learning”, ELSEVIER, Journal of Structural Building Engineering, Volume 80, December 1, 2023, pp.1027-1037.
16. IS 1893 (Part 1) : 2016 – “Criteria for Earthquake Resistant Design of Structures : Part 1 – General Provisions and Buildings”, Bureau of Indian Standards, New Delhi, December 2016.
17. IS 456 : 2000 – “Indian Standard Code of Practice for General Structural Use of Plain and Reinforced Concrete”, Bureau of Indian Standards, New Delhi, July 2000.
18. IS 875 : 2015 – “Indian Standard Code of Practice for Design Loads (Other than Earthquake) for Buildings and Structures”, Bureau of Indian Standards, New Delhi – 110002, April 2015.
Recent Trends in Civil Engineering & Technology
| Volume | 14 |
| Issue | 02 |
| Received | June 12, 2024 |
| Accepted | July 9, 2024 |
| Published | July 10, 2024 |