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: Geopolymer Concrete is one of the emerging construction materials as a substitute for conventional cement concrete, eliminating the usage of Ordinary Portland Cement. This paper aims to provide the failure pattern and yield line behaviour of Geopolymer concrete two way slabs with polypropylene fibres and compare with the conventional reinforced cement concrete. The Slab model used is of 1000mmx1000mmx30mm reinforced with 4mm diameter steel mesh. The failure pattern was studied experimentally for slab subjected to uniformly distributed load with fixed condition all-round. The results obtained agree with behaviour of conventional concrete. The results were validated using finite element model.

• Publication Date: 14-Dec-2014
• DOI: 10.15224/978-1-63248-035-4-74
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