The analysis and behaviour of composite space frames with profiled steel sheet floors

Kuleib, MMA

Abstract

The objective of this research was to analyse and
investigate the behaviour of a composite space frame.
The space frame is assembled from individual inverted
square-based pyramids. Each pyramid consists of a steelangle section top-tray and diagonals. When the top trays are connected together, they form the top-chord members of a double-angle section connected back to back.
The investigation is primarily concerned with the
composite section within the space frame system which
comprises the top chord members, profiled steel sheeting
and a concrete slab. This composite section is also
assumed to work as a system of intersecting composite Tbeams.
Each composite T-beam comprises of a top chord
member, a certain width of profiled steel sheet and a
concrete slab. The composite action is ensured by a
series of self-tapping screws.
The experimental work is based on two-unit space
frame specimens. Each specimen represents two adjacent
units with their top chord member which carries the
highest compressive axial load in the real structure.
Each unit is tested in a situation which simulates its
position and loading within the real structure. In
addition to the composite T-beams being tested, steel
struts composed of the top chord member double-angles were tested.
In the theoretical section, the real structure is
analysed as composite beam elements and thin steel plate
elements which all represent the top composite T-beams.
The diagonals and the ties were considered as truss
elements. A successful method of analysis was developed
using matrix and finite element methods resulting in the
force distribution and deformations for a full composite
space frame. Additionally, the experimental work yielded
useful information on the behaviour of composite struts
of this type. Recommendations for future work are made.
The investigation of the behaviour of the composite
T-beams with different locations and numbers of shear
connectors together with the analysis of the structure
comprise the main part of this work.

Citation

Kuleib, M. The analysis and behaviour of composite space frames with profiled steel sheet floors. (Thesis). University of Salford, UK

• Thesis Type: Thesis
• Deposit Date: Jun 10, 2009
• Publicly Available Date: Jun 10, 2009
• Additional Information: Additional Information : PhD supervisor: Mr. D. C. O'Leary
• Award Date: Aug 1, 1989