Economically Prudent Design (EPC) of Outrigger-Based Structural Systems
Keywords:Outrigger, Time History, Response Spectrum, Tall Buildings, Seismic Load
As the construction of mega-tall buildings in all major cities around the world accelerates, the seismic risk associated with them also rises. Hence study on the response of tall buildings to earthquake loads is gaining significant importance. Outrigger tall buildings are one of the most common structural structures because they are simple to construct, cost-effective, and have significant lateral stiffness. Therefore, this research explores a structural outrigger system for high-rise buildings to analyze the output of a system by changing the place of outrigger positions. Dynamic research was performed in accordance with IS 1893, the response spectrum and time of California’s most recent earthquakes. The parameters discussed are lateral displacements, inter-storey drifts for static analysis, and base force, displacement, and spectral acceleration for dynamic analysis. From the analyzed results, it was found that an outrigger when located at H0/H=0.6 causes a maximum reduction in the lateral displacement. Hence outrigger located at H0/H=0.6 is the desired location to provide an outrigger in a structural system and could act as an initial economical prudent design solution in the construction of tall buildings with outriggers. Time history analysis shows that the reduction is maximum when the outrigger is located at H0/H=0.9 for LA03, H0/H=0.85 for LA06 H0/H=1.0 for LA14.
M. J. Park, and Y. K. Ju, “Disaster Assessment of Tall Buildings in Korea by K-Rapid Visual Screening System Focusing on Structural Safety,” Buildings, Vol. 12, No. 4, pp. 442, 2022.
C. Fang, “Applicability of Damped Outrigger Systems Using Timoshenko Beam Theory,” International Journal of Structural Stability and Dynamics, pp. 2250076, 2022.
I. Venanzi, et al., “Multi-hazard loss analysis of tall buildings under wind and seismic loads,” Structure and Infrastructure Engineering, Vol. 14, No. 10, pp. 1295-1311, 2018.
M. N. Aydınoğlu, “Challenges and problems in performance-based design of tall buildings, in Performance-Based Seismic Engineering: Vision for an Earthquake Resilient Society,” Springer, pp. 279-300, 2014.
M. M. Ali, and K. S. Moon, “Structural developments in tall buildings: current trends and future prospects,” Architectural science review, Vol. 50, No. 3, pp. 205-223, 2007.
A. Dangi, and S. Jamle, “Determination of Seismic parameters of RCC Building Using Shear Core Outrigger, Wall Belt and Truss Belt Systems,” International Journal of Advanced Engineering Research and Science, Vol. 5, No. 9, pp. 305-309, 2018.
N. M. N. Al-Azri, S. Kuckian, and H. Gaur, “Reducing the Impact of Wind Load with Shape of High Rise Buildings,” Journal of Student Research, 2019.
S. Fawzia, and T. Fatima, “Deflection control in composite building by using belt truss and outriggers systems,” Proceedings of the World Academy of Science, Engineering and Technology, pp. 800-805, 2010.
N. Herath, et al., “Behaviour of outrigger beams in high rise buildings under earthquake loads in Australian Earthquake Engineering Society” Conference, 2009.
N. Priyanka, , et al., “Comprehensive Analysis of Outrigger System for High Rise Structures Subjected to Wind and Earthquake Loadings, in Sustainability Trends and Challenges in Civil Engineering,” Springer, pp. 601-618, 2022.
T. Wang, S. Yang, and X. Wang. “Analysis of construction parameters of outriggers in the mega column-core tube-outrigger structure based on seismic reliability. in Structures,” Elsevier, 2022.
A. Habrah, M. Batikha, and G. Vasdravellis, “An analytical optimization study on the core-outrigger system for efficient design of tall buildings under static lateral loads,” Journal of Building Engineering, Vol. 46, pp. 103762, 2022.
J. Lee, et al., “Geometric nonlinear analysis of tall building structures with outriggers,” The Structural Design of Tall and Special Buildings, Vol. 22, No. 5, pp. 454-470, 2013.
K. Kamath, N. Divya, and A. U. Rao, “A study on static and dynamic behavior of outrigger structural system for tall buildings,” Bonfring international journal of industrial Engineering and Management Science, Vol. 2, No. 4, pp. 15-20, 2012.
S. M. Walls, “FEMA 356 Prestandard and Commentary for the Seismic Rehabilitation of Buildings”, ASCE for the Federal Emergency Management Agency, Washington, DC, November 2000. R. Forghani, Totoev Y. Z. S. Kanjanabootra, “Experimental investigation of the water penetration through semi interlocking masonry (SIM) walls”, Proc. Annual Meeting of Architectural Institute of Japan, Kobe, Japan, September 2014, pp. 889-890. Masonry Society Journal, Vol. 25, No. 1, pp. 41-52, 2004.
S. K. Jain, “Review of Indian seismic code, IS 1893 (Part 1): 2002,” Indian concrete journal. Vol. 77, No. 11, pp. 1414-1422, 2003.
S. Kuckian, et al., “A study on seismic response of reinforced structures retrofitted with fluid viscous dampers in shear walls,” GRIN Verlag, 2019.
A. AR, et al., “Seismic response of a structure retrofitted with fluid viscous dampers in core wall–an analytical study,”.
A. Gupta and D. Podder, “Optimum position of outrigger-belt system in a high-rise RCC building through pushover analysis,” Asian Journal of Civil Engineering. Vol. 22, No. 2, pp. 277-296, 2021.
F. Adachi, et al., “Importance of interstory velocity on optimal along-height allocation of viscous oil dampers in super high-rise buildings,” Engineering structures. Vol. 56, pp. 489-500, 2013.
G. Guo, et al., “Self-similar inter story drift spectrum and response distribution of flexural-shear beam with non-uniform lateral stiffness,” Bulletin of Earthquake Engineering. Vol. 17, No. 7, pp. 4115-4139, 2019.
D. Yang, J. Pan, and G. Li, “Interstory drift ratio of building structures subjected to near-fault ground motions based on generalized drift spectral analysis,” Soil Dynamics and Earthquake Engineering. Vol.30, No.11, pp. 1182-1197, 2010.
M. Jackson, and D. M. Scott. “Increasing efficiency in tall buildings by damping. in Structures Congress,” 2010.