Open Access
Pratiksha K. Pawar
Sanjay S. Jamkar
- Post Graduate Student Department of Applied Mechanics, Government Engineering College Maharashtra India
- Professor Department of Applied Mechanics, Government Engineering College Maharashtra India
Abstract
The exact value of column shortening is not a straightforward task. Various parameters are affected on column shortening results like rate of construction sequence and reinforcement ratio. The building should stand with high stiffness and must be able to resist lateral deformation without having discomfort to the user. The excessive drift is controlled by using outrigger system. In high rise buildings, the construction sequence analysis and conventional sequence analysis are used for column shortening of columns. For analysis of high rise buildings, the construction sequence analysis shows very good results as compared to conventional sequence analysis. In this work, the lumped construction sequence method is used for column shortening, and its efficiency is investigated for different lumping ratios are 1/5, 1/10, 1/15, 1/25 of total number of storeys of the building. These different lumping ratios are considered on 75, 90, 120 storey buildings. The model analysis is carried out in ETABS software. The analysis results indicate that the saw-tooth shape of total shortening has occurred, which can be modified by the curve fitting technique. The results of column shortening are nearly matching for the 1F unit model and 1/15 ratio of a lumped model. The lumped models about 1/15 lumping ratio of the storeys of the building is recommended for construction sequence analysis with accuracy of results.
Keywords: Column shortening, construction sequence ,lumped unit models outrigger system ,high rise building
[This article belongs to Recent Trends in Civil Engineering & Technology(rtcet)]
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References
1. Fintel, M., and Khan, F. R. Effects of Column Creep and Shrinkage in Tall Structures- Prediction of Inelastic Column Shortening. ACI Journal. 1969; 66, 957-967p.
2. M. T. R. Jayasinghe and W. M. V. P. K. Jayasena. Effects of Axial Shortening of Columns on Design And Construction of Tall Reinforced Concrete Building. ASCE. 2004; 9, 70-78p.
3. Bazat ZP and Wittmann FH. Creep and Shrinkage in Concrete Structure. John Wiley &Sons.1982; New York.
4. Tianyi Yi, Ph.D., Walter P. Moore. Differential Column Shortening Effects in Typical Medium to High Rise Building. ASCE- Structures Congress: New Horizons and Better Practices. 2007.
5. Kidong Park, Daeyoung Kim. A Comparison Study of Conventional Construction Methods and Outrigger Damper System for the Compensation of Differential Column Shortening in High-Rise Buildings. International Journal of Steel Structures. 2010; 10(4), 317-324p.
6. H.S. Kim and S.H. Shin. Column Shortening Analysis with Lumped Construction Sequences. Procedia Engineering. 2011; 14, 1791-1798p.
7. Santosh Panigrahi, Dr. Vikram Patil, Madan S. H., Somanagonda Takkalaki. Importance of Construction Sequence Analysis in Design of High Rise Building. IJISET. 2019; 6 (4).
8. M. Hassanien Serror and A. Essam El-Din. Assessment of Internal Forces Induced Due to Differential Shortening of Vertical Elements in Typical Medium-to- High-Rise Buildings. Journal of American Science. 2012; 8, 161-174p.
9. Fintel, M., Ghosh, S.K & Iyengar, H. Column Shortening in Tall Structures: Prediction and Compensation. Portland cement Association, Skokie. 1987; 3, 1-35p.
10. Shrikant R. Bhuskade, Samruddhi C. Sagane. Effects of Various Parameters of Building on Natural Time period. IJERT. 2017; 6, 557-561p.
11. Sudhir K. Patel, A. N. Desai. Effect of Number of Storeys to Natural Time Period of Building. National Conference on Recent Trends in Engineering & Technology, Gujarat.2011.
12. Geethu Girija Das, Dr. Praseeda K. I. Comparison of Conventional and Construction Stage Analysis of a RCC Building. IJASTE. 2016; 3, 50-57p.
13. Ruben Correia, Paulo Silva Lobo. Simplified Assessment of the Effects of Columns Shortening on the Response of Tall Concrete Buildings. Procedia Structural Integrity. 2017; 5, 179-186p.
14. Wael Alhaddad, Yahia Halabi, Hu Xu, Hong Gang Lei. Outrigger and Belt-Truss System Design for High-Rise Buildings: A Comprehensive Review Part II- Guideline for Optimum Topology and Size Design. Hindawi. Advances in Civil Engineering. 2020; 1-30p.
15. Han-Soo Kim. Optimum Locations of Outriggers in a Concrete Tall Building to Reduce Differential Axial Shortening. International Journal of Concrete Structures and Materials. 2018; 1-12p.
16. Indian Standard. Code of Practice for Design Loads (Other than Earthquake) for Buildings and Structures-Dead Loads. New Delhi: Bureau of Indian Standards; 1987.
17. Indian Standard. Code of Practice for Design Loads (Other than Earthquake) for Buildings and Structures-Live Loads. New Delhi: Bureau of Indian Standards; 1987.
18. Indian Standard. Code of Practice for Design Loads (Other than Earthquake) for Buildings and Structures-Wind Loads. New Delhi: Bureau of Indian Standards; 1987.
19. Indian Standard. Code of Criteria for Structural Safety of Tall Concrete Buildings-Lateral deflection. New Delhi: Bureau of Indian Standards; 2017.
20. Indian Standard. Code of Criteria for Earthquake Resistant Design of Structures-Earthquake Loads. New Delhi: Bureau of Indian Standards; 2016.
Recent Trends in Civil Engineering & Technology
| Volume | 11 |
| Issue | 3 |
| Received | September 28, 2021 |
| Accepted | October 22, 2022 |
| Published | January 22, 2023 |