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The Scientific World Journal
Volume 2014, Article ID 309872, 13 pages
http://dx.doi.org/10.1155/2014/309872
Research Article

Research on the Mechanical Properties of a Glass Fiber Reinforced Polymer-Steel Combined Truss Structure

1Institute of Field Engineering, PLA University of Science & Technology, Nanjing, Jiangsu 210007, China
2Department of Engineering Management, PLA Institute of Logistics Engineering, Chongqing 401331, China
3Institute of Defense Engineering, PLA University of Science & Technology, Nanjing, Jiangsu 210007, China

Received 28 March 2014; Revised 15 June 2014; Accepted 17 June 2014; Published 27 August 2014

Academic Editor: Gaetano Giunta

Copyright © 2014 Pengfei Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An assembled plane truss structure used for vehicle loading is designed and manufactured. In the truss, the glass fiber reinforced polymer (GFRP) tube and the steel joint are connected by a new technology featuring a pretightened tooth connection. The detailed description for the rod and node design is introduced in this paper, and a typical truss panel is fabricated. Under natural conditions, the short-term load test and long-term mechanical performance test for one year are performed to analyze its performance and conduct a comparative analysis for a reasonable FEM model. The study shows that the design and fabrication for the node of an assembled truss panel are convenient, safe, and reliable; because of the creep control design of the rods, not only does the short-term structural stiffness meet the design requirement but also the long-term creep deformation tends towards stability. In addition, no significant change is found in the elastic modules, so this structure can be applied in actual engineering. Although the safety factor for the strength of the composite rods is very large, it has a lightweight advantage over the steel truss for the low density of GFRP. In the FEM model, simplifying the node as a hinge connection relatively conforms to the actual status.