Numerical simulation of axially loaded concrete columns under transverse impact and vulnerability assessment

Thilakarathna, Herath Mudiyanselage Indika, Thambiratnam, David, Dhanasekar, Manicka, & Perera, Nimal (2010) Numerical simulation of axially loaded concrete columns under transverse impact and vulnerability assessment. International Journal of Impact Engineering, 37(11), pp. 1100-1112.

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With a view to assessing the vulnerability of columns to low elevation vehicular impacts, a non-linear explicit numerical model has been developed and validated using existing experimental results. The numerical model accounts for the effects of strain rate and confinement of the reinforced concrete, which are fundamental to the successful prediction of the impact response. The sensitivity of the material model parameters used for the validation is also scrutinised and numerical tests are performed to examine their suitability to simulate the shear failure conditions. Conflicting views on the strain gradient effects are discussed and the validation process is extended to investigate the ability of the equations developed under concentric loading conditions to simulate flexural failure events. Experimental data on impact force–time histories, mid span and residual deflections and support reactions have been verified against corresponding numerical results. A universal technique which can be applied to determine the vulnerability of the impacted columns against collisions with new generation vehicles under the most common impact modes is proposed. Additionally, the observed failure characteristics of the impacted columns are explained using extended outcomes. Based on the overall results, an analytical method is suggested to quantify the vulnerability of the columns.

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ID Code: 34113
Item Type: Journal Article
Refereed: Yes
Keywords: Concrete colums, Transverse Impacts, Numerical Simulation, Vehicle Collisions
DOI: 10.1016/j.ijimpeng.2010.06.003
ISSN: 0734-743X
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Urban Development
Copyright Owner: 2010 Elsevier Ltd All rights reserved.
Deposited On: 18 Aug 2010 01:07
Last Modified: 29 Feb 2012 14:16

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