Analysis of an alternative topology for steel-concrete-steel sandwich beams incorporating inclined shear connectors
University of Southampton, Faculty of Engineering and the Environment,
This thesis presents a new concept in steel-concrete-steel sandwich construction in which
a bi-directional corrugated-strip core is proposed as an alternative inclined shear connector.
The focus is on the feasibility study of fabrication techniques and the theoretical
study of the structural responses of both unfilled and concrete-filled steel-concrete-steel
sandwich beams under static flexural loading using numerical and analytical methods.
Two possible fabrication techniques to create the proposed bi-directional corrugatedstrip
core are presented. The unfilled sandwich beam is studied using a finite element method and three analytical methods referred to as the modified stiffness matrix, the
braced frame analogy, and the discrete beam methods The finite element method is used to investigate the stiffness and strength behaviour of the unfilled sandwich beam.
The modified stiffness matrix method provides good correlation with the finite element
method. The other two analytical methods are less accurate. The assessment of the effect
of geometrical parameters defining the bi-directional corrugated-strip core is carried
out. The responses of the strength and stiffness, especially the transverse shear stiffness,
are examined and discussed. The optimum configuration of the core is found at the angle
of the inclined part of the corrugation is about 45o. The concrete-filled sandwich beam
is studied using the fnite element method. The finite element method is used to investigate
the transverse shear strength and the crack development of a four-point loaded
concrete-filled sandwich beam. The assessment of the effect of geometrical parameters
defining the inclined shear connectors is carried out. The responses of the concrete-filled
sandwich beam are examined and discussed. The optimum advantage of the transverse
shear strength of the concrete-filled sandwich beam is also found when the inclined shear
connectors align at an angle 45o. It is found that creating the proposed core with a 45o
pattern provides a great advantage in transverse shear stiffness and strength in both the
unfilled and concrete-filled sandwich beams.
||University of Southampton, Engineering Science Unit
|1 March 2011||Published|
||28 Jun 2012 13:47
||17 Apr 2017 17:27
|Further Information:||Google Scholar|
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