Steel Square Hollow Sections Subjected To Transverse Blast Loads
Date
2012Author
Zhaoa, X.L
Grzebietac, R.H
Nurickb, G.N
Jamaa, H.H
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
Thin-walled steel hollow sections are used extensively in the construction, offshore, mining and security industries. Such members subjected to blast loads are of interest due to increased security demands and the occurrence of accidental or intentional explosive events. This paper reports an experimental and analytical investigation of steel square hollow sections subjected to transverse blast load, applied with explosive uniformly distributed along the length of the member. Three different section sizes were tested over three different lengths, and the members were fully clamped at their ends. The explosive loads were sufficient in magnitude to cause plastic deformation of the cross-section (local deformation), plastic flexural deformation of the overall member (global deformation), and tensile tearing at the supports. The energy dissipated in the local deformation is determined using rigid-plastic analysis and yield line mechanisms of the deformed cross-sections. The total input energy minus the energy dissipated in local deformation is assumed to be expended in flexural deformation. Analytical solutions using the energy consumed in flexural deformation are shown to produce bounded solutions of the transverse plastic deformation of the members. Finally, a semi-empirical solution is suggested that can be used to aid in design.
URI
http://www.sciencedirect.com/science/article/pii/S0263823112000109http://hdl.handle.net/11295/39601
Publisher
Department of Civil Engineering, Monash University, VIC 3800, Australia Blast Impact and Survivability Research Unit (BISRU) Department of Mechanical Engineering, University of Cape Town, Private Bag Rondebosch 7701, South Africa TARS, Faculty of Science, University of New South Wales, Old Main Building (K15), Sydney, NSW 2052, Australia
Description
We report experiments of steel hollow sections subjected to transverse explosive loads. ► Results indicate a combination of local cross-section deformation and global flexural deformation. ► Existing theories were found not to be generally applicable to steel hollow sections. ► A new theory was developed which includes the energy dissipated in local deformation. ► A semi-empirical design method is shown to provide reasonable estimates of the deformation.