Study of the Effectiveness of Outrigger System for High-Rise Composite Buildings for Cyclonic Region

Authors: S. Fawzia, A. Nasir, T. Fatima

Abstract:

The demands of taller structures are becoming imperative almost everywhere in the world in addition to the challenges of material and labor cost, project time line etc. This paper conducted a study keeping in view the challenging nature of high-rise construction with no generic rules for deflection minimizations and frequency control. The effects of cyclonic wind and provision of outriggers on 28-storey, 42-storey and 57-storey are examined in this paper and certain conclusions are made which would pave way for researchers to conduct further study in this particular area of civil engineering. The results show that plan dimensions have vital impacts on structural heights. Increase of height while keeping the plan dimensions same, leads to the reduction in the lateral rigidity. To achieve required stiffness increase of bracings sizes as well as introduction of additional lateral resisting system such as belt truss and outriggers is required.

Keywords: Cyclonic wind regions, dynamic wind loads, Alongwind effects, Crosswind response, Fundamental frequency of vibration.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1075907

References:

[1] S. Fawzia and T. Fatima, Deflection Control in composite building by using Belt truss and Outrigger System. Proceedings of the 2010 World Academy of Science, Engineering and Technology conference, pp. 25-27 August 2010, Singapore.
[2] Standard Australia/ Standard New Zealand, Structural Design Action Part 2: Wind Actions, AS/NZS 1170.2:2011.
[3] Strand7 Pty Ltd. Strand7, Finite Element Analysis System. User-s Manual 2005, Sydney, Australia.
[4] P. Mendis and T. Ngo, Design of Tall Buildings - Recent Changes. Australasian Structural Engineering Conference (ASEC), pp. 26-27 June 2008, Melbourne Australia.
[5] P. Gabor, Concrete Buildings: past, present and future. Australian Journal of Civil Engineering, vol. 6 No. 3, Institute of Engineers Australia 2006.
[6] M.M. Ali, Evolution of Concrete Skyscrapers: from Ingalls to Jin mao. Electronic Journal of Structural Engineering, vol. 1, No.1, pp. 2-14 (2001).
[7] P. Jayachandran, Design of tall Buildings - Preliminary Design and Optimization. National Workshop on High-rise and Tall buildings, University of Hyderabad, India, May 2009.
[8] Standard Australia/Standard New Zealand, Structural Design Action Part 0: General Principal, AS/NZS 1170.0:2002.
[9] Standards Australia, Steel Structure. AS 4100:1998.
[10] Australian Standards, Concrete Structures. AS 3600-2009.
[11] R. Rahgozar and Y. Sharifi, An approximate analysis of Framed tube, Shear core and Belt truss in high-rise building. Struct. Design Tall Spec. Build. Vol. 18, pp. 607-624 (2009).
[12] BlueScope Lysaght Manual, Using Bondek- design and construction guide 2003 edition, BlueScope Steel limited, Australia.
[13] A. Ng and G. Yum, Span Tables for Simply supported Composite Beams. Onesteel Market Mills Design Note DN3. Ed1.1, Nov 2005.
[14] Building Code of Australia (BCA). Volume 1 and Edition 2011.
[15] Standard Australia/Standard New Zealand, Structural Design Action Part 2: Wind Actions, AS/NZS 1170.1:2002.
[16] A.M. Nasir and J. Beutel, Wind analysis of multi-storey building. Accepted for Australian Structural Engineering Conference, New Castle, Australia and Presented in International Conference on ÔÇÿAdvances in Cement based Materials and Applications in Civil Infrastructure-, Lahore, Pakistan (2007).
[17] Australian Steel Institute (ASI), Design Capacity Tables. Volume 1, Fourth edition 2009.
[18] J. R. Wu and Q. S. Li, Structural Performance of Multi-Outrigger-Brace Tall Buildings. Struct. Design Tall Spec. Build. vol. 12, pp. 155–176 (2003).