Polymer Composite with Sisal Fiber Used for Node Reinforce in Space-Truss with Stamped Connection

Abstract:

Space trusses are three-dimensional structures made of steel bars very frequently used at the roof construction. The bars, with tubular section, are linking in the 3D form by connections. There are several types of connections to attach these members. The most economical connection is the staking end-flattened connection, also called typical node. The reduced cost and the fast assemblage of the truss are among their advantages. However, such connections present disadvantages like eccentricities and stiffness weakening of the tubular members. This research presents suggestions of reinforcement and constructive correction in the connection in order to increase its capacity. The base for this is the reduction of the eccentricity in typical node applying the spacer. This spacer was made by polymer composite with sisal fiber. In this work was developed experimental lab tests in prototypes with fifty four meters square of area. The results show an increase of 26% for collapse in the truss load carrying capacity when the suggested changes proposed in this article are used for the staking end-flattened connections.

• Periodical: Applied Mechanics and Materials (Volumes 719-720)
• Pages: 202-205
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.719-720.202
• Online since: January 2015
• Authors: Cleirton A.S. Freitas, Mucio M.S. Nobrega, Édipo A. Bezerra, Otávio R.O. Cavalcante
• Keywords: Polymer with Sisal Fiber, Space Trusses, Typical Node

References

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