Abstract: This paper presents a test program on screw connections of thin steel sheets using single shear connection and moment connection tests. The structural behavior of the screw connections were studied by varying the thickness of the steel sheets, number and arrangement of screws for each connection. The failure loads and failure modes were obtained from the tests. The failure modes observed were net section tension, tilting and bearing failure. No buckling was observed in the moment connection joint. The test strength was compared with the predicted strength using the current specifications for cold-formed steel structures. It is shown that the strength of the single shear screw connection predicted by the current specifications is generally conservative. However, the strength predicted for the moment connection joint is not conservative.

• Publication Date: 14-Dec-2014
• DOI: 10.15224/978-1-63248-035-4-73
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Abstract: The design of tunnel lining requires a proper estimate lining forces. In engineering practice different design methods tend to be used, varying from simple empirical and analytical formulations to advanced finite element analysis. This paper begins with a review of empirical and analytical analysis for tunnel lining forces and materials, followed by the design methodology, the analytical results and the concrete design of the tunnel lining using structural software known as STAAD Pro. The scope of this research is mainly focused on the analysis and concrete design of the tunnel lining. Finally, the results obtained are carefully shown in this paper and performed by mean of two different approaches: a tunnel lining analysis and a concrete design results, showing the excellent accuracy achieved in terms of displacements, stresses, reactions, bars criteria and main reinforcement.

• Publication Date: 14-Dec-2014
• DOI: 10.15224/978-1-63248-035-4-76
• Views: 0
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