Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543380
Title: Analysis of an alternative topology for steel-concrete-steel sandwich beams incorporating inclined shear connectors
Author: Leekitwattana, Manit
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 2011
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Abstract:
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.
Supervisor: Boyd, Stephen ; Shenoi, Ramanand Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.543380  DOI: Not available
Keywords: TA Engineering (General). Civil engineering (General) ; TH Building construction ; TS Manufactures
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