Advanced Steel Construction

Vol. 13, No. 1, pp. 30-44 (2017)


NEW EXPERIMENTAL RESULTS OF THE RESEARCH ON

REINFORCED NODE IN SPACE TRUSS

 

Cleirton A. S. Freitas1,*, Luciano M. Bezerra2b, Rafael M. Araújo1, Emanuel C. Sousa1, Geverson M. Araújo1 and Édipo A. Bezerra1

1 Research Group on Structural Engineering in Cariri - GPEEC, Federal University of Cariri

http://www.ufca.edu.br, Av. Tenente Raimundo Rocha S/N, Cidade Universitária, Juazeiro do Norte, 630000 Ceará, Brazil.  

2 Department of Civil and Environmental Engineering, University of Brasília – UnB

http://www.unb.br, Brasília 70910-900, DF, Brazil

*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 25 August 2015; Revised: 7 January 2016; Accepted: 20 February 2016

 

DOI:10.18057/IJASC.2017.13.1.2

 

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ABSTRACT

In the first stage of this research the proposal of the reinforced node used in space truss was presented. Computer simulations and experimental lab tests were performed with small changes on the staking flattened-end connections, such as reinforcement and eccentricity correction. The results showed 68% increase in the truss load carrying capacity when the proposed changes were applied. However, small prototypes measuring 4 m2 were used for laboratory testing. In this paper, for proposal validation, the same research was developed, this time in prototypes with 54 m2. The outcome results of this research, confirmed a significant increase in the truss load carrying capacity. It is expected that factories can apply the reinforced node in space truss constructions to come.

 

KEYWORDS

Space truss, steel connection, steel construction, steel roof


REFERENCES

[1]       Krenk, S., Hogsberg, J., “Statics and Mechanics of Structures”, Hardcover, 2013, ISBN:978-94-007-6112-4.

[2]       Caglayan, O. and Yuksel, E., “Experimental and Finite Element Investigations on the Collapse of a Mero Space Truss Roof Structure, Case Study”, Engineering Failure Analysis, 2008, Vol. 15, pp. 458–470.

[3]       Taniguchi, Y., Saka, T., Shuku, Y., “Buckling Behavior of Space Trusses Constructed by a Bolted Jointing System”, Space Structures, 2009, Vol. 4, pp. 89 – 97.

[4]       Souza, A. C. and Gonçalves, R.M., “Mechanism of Collapse of Space Trusses with Steel Hollow Circular Bars with Flattened Ends”, International Journal of Space Structures, 2005, Vol. 20, pp. 201 – 209.

[5]       Marshall, P.W., “Design of Welded Tubular Connections, Basis and Use of AWS Provisions”, 1992, Elsevier Science Publishers, Amsterdam.

[6]       Gu, M., Tong, L.W., Zhao, X.L. and Zhang, Y.F., “Numerical Analysis of Fatigue Behavior of Welded CFCHS T-joints”, Advanced Steel Construction, 2014, Vol. 10, No. 4, pp. pp. 476-497.

[7]       Vacev, T., Kisin, S., Ranković, S., “Experimental Analysis of an Original Type of Steel Space Truss Node Joint”, Architecture and Civil Engineering, 2009, Vol. 7, pp. 43 – 55.

[8]       Freitas, C.A.S., “Estudo Experimental, Numérico e Analítico de Conexões de Estruturas Espaciais em aço com correção e reforço na ligação típica estampada”, DSc Thesis (in Portuguese), 2008, Department of Civil Engineering, University of Brasilia.

[9]       Souza, A. C. and Gonçalves, R.M., “Behavior of Tubular Space Truss Connections with Stamped End Bars”, International Journal of Space Structures, 2002, Vol. 5, pp. 337 – 345.

[10]     SAP2000, User’s Guide: A Structural Analysis Program for Static of Linear Systems. Educational Version, Computers & Structures Inc., 1999, Berkley, USA.

[11]     Bezerra, L. M., Freitas, C. A. S., Matias, W. T., Nagato, Y., “Increasing Load Capacity of Steel Space Trusses with End-flattened Connections”, Journal of Constructional Steel Research, 2009, Vol. 65, pp. 2197 - 2206.

[12]     Freitas, C. A. S., Bezerra, L.M., Silva, R. S. Y. C., “Numerical and Experimental Study of Steel Space Truss with Stamped Connection”, Journal of Civil Engineering and Architecture, 2011, Vol. 5, pp. 494-504.

[13]     Associação Brasileira de Normas Técnicas, NBR 8800. “Projeto e execução de estruturas de aço de edifícios: método estados limites”. Rio de Janeiro, 2008.

[14]     American Institute of Steel Construction AISC – LRFD (1999), “Manual of Steel Construction”, Chicago.

[15]     Freitas, C.A.S., Nobrega, M.M.S., Bezerra, E. A., Cavalcante, O. R.O., “Polymer Composite with Sisal Fiber Used for Node Reinforce in Space-Truss with Stamped Connection”, Applied Mechanics and Materials, 2015, Vol. 719-720, pp. 202-205.

[16]     Fong, M., Peng, Y.P. and Chan, S.L., “Second-order Analysis and Experiments of Semi-rigid and Imperfect Domes”, Advances in Structural Engineering, 2013, Vol.15, No.9, pp.1549-1558.