Behaviour and Design of Steel Columns Subjected to Vehicle Impact

Al-Thairy, Haitham; Wang, Yongchang

doi:10.4028/www.scientific.net/amm.566.193

Cited by 12 publications

(18 citation statements)

References 42 publications

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“…In this study, the damping effect is neglected because it has no clear influence on structural behaviour for the studied cases. This can be attributed to the short duration of the impact compared to the natural period of the structural system (Jones, 1997, Al-Thairy, 2012. …”

Section: Element Typesmentioning

confidence: 99%

“…Several studies (Al-Thairy, 2012, Jones, 1997 have suggested different failure modes for steel members under impact loads including global plastic failure, tensile tearing failure and shear failure. For externally bonded CFRP strengthened steel elements under static load, six possible failure modes have been suggested by (Zhao and Zhang, 2007).…”

Section: Failure Modesmentioning

confidence: 99%

“…For instance, Bambach et al (2008), Huo et al (2011) tested fully clamped hollow square sections and simply supported I-sections under a dropped mass respectively. Al-Thairy (2012) and Pei and Wang (2012) studied the effect of impact loads on structural members using the finite element method (FEM) and found the models capable of simulating the behaviour of steel members under impact loads.…”

Section: Introductionmentioning

confidence: 99%

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Modelling impact resistance of polymer-laminated steelwork

Kadhim¹,

Wu²,

Cunningham³

2017

Proceedings of the Institution of Civil Engineers - Engineering

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This paper reports the numerical simulation of a series of carbon fibre reinforced polymer (CFRP) strengthened steel beams under impact loads. Non-linear finite element (FE) analysis is conducted using a proposed FE model validated via comparison with available experimental tests. The numerical model includes the effect of the strain rate for steel using the Johnson-Cook model, while for CFRP and adhesive materials the Cowper-Symonds model is employed. Several possible failure modes for the strengthened member can be captured using the FE model such as global steel failure, CFRP rupture and debonding between steel members and CFRP laminates. The numerical results show that the use of externally bonded CFRP laminates decreases mid-span deflection of strengthened beams in the series by 11%. While having the same level of impact kinetic energy, it is found that a beam struck at a lesser velocity and with a larger mass of impactor tends to have higher deflection both for the strengthened and un-strengthened cases. Additional key parameters such as CFRP laminate thickness are also investigated in this study.

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Section: Element Typesmentioning

confidence: 99%

Section: Failure Modesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modelling impact resistance of polymer-laminated steelwork

Kadhim¹,

Wu²,

Cunningham³

2017

Proceedings of the Institution of Civil Engineers - Engineering

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“…The experimental study conducted by Zeinoddini et al [15] found that the level of damage of tested un-strengthened columns was dependent on the level of axial preload. Al-Thairy [16] undertook an extensive numerical parametric study using the commercial finite element code ABAQUS to develop a simplified analysis method for axially compressed un-strengthened steel columns subjected to transverse impact. It was found that the location of the plastic hinge was almost always close to the centre of the column and was not dependent of the impact position except for a very low level of axial compression (<25% design resistance).…”

Section: Introductionmentioning

confidence: 99%

Experimental study of CFRP strengthened steel columns subject to lateral impact loads

Kadhim

Cunningham

2018

Composite Structures

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In both building and civil engineering structures, the occurrence of impact loading to column elements can be a significant issue, particularly in regard to disproportionate collapse. For existing structures vulnerable to impacts, the development of appropriate strengthening techniques is key to extending service life and improving robustness. In the case of structural steelwork, composites such as carbon fibre reinforced polymer (CFRP) offer a promising means of retrofitting and improving performance under impact. Towards this, the present study experimentally investigated a total of 12 square hollow section (SHS) columns under impact loads. The test series included both unstrengthened and CFRP strengthened samples with different fibre orientations with a view to finding the optimum CFRP configuration. As a means of simulating lateral impact on axially loaded elements, a purpose-built test rig was manufactured to apply a compressive preload to the samples prior to impact. Different preloading levels were applied to the samples before they were impacted transversely. The results show that the strengthening effectiveness increased with higher preloading level. The average reduction in the transverse displacement for the strengthened columns tested under 70% preloading level was around 32% compared to the unstrengthened column while this value was about 22% for the columns tested without compressive preload.

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“…The nonlinear spring is modelled to define the load-deformation behaviour of vehicle during impact simulation. The validation of spring-mass vehicle model is conducted by comparing maximum contact force-displacement results with vehicle full frontal impact tests data available in US National Highway Traffic Safety Administration (NHTSA, 2011) and previous FE analysis (Al-Thairy 2012). The contact forces of vehicle frontal crush tests are estimated by Al-Thairy (AlThairy 2012) using the proposed equations (Campbell 1974;Jiang et al 2004) and vehicle frontal crush data from NHTSA.…”

Section: Spring-mass System Vehicle Modelmentioning

confidence: 99%

CFRP strengthened CFST columns under vehicular impact

Alam¹,

Fawzia²,

Batuwitage³

2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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Concrete filled steel tubular (CFST) columns are increasingly used in bridge piers and high-rise buildings due to their excellent axial load bearing capacity. These columns may experience severe damage or failure due to transverse impact of vehicle collisions. In this study, numerical investigation is carried out to evaluate the effect of carbon fibre reinforced polymer (CFRP) strengthening CFST columns under vehicular impact. The CFRP composites damage mechanisms are simulated to account four different failure criteria. The cohesive elements are introduced as interface element to properly simulate the adhesively bonded regime. Simplified vehicle model is also developed to represent real vehicle behaviour. The FE analysis results show that externally bonded CFRP composites improve the impact resistance capacity compared to bare CFST column.

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Behaviour and Design of Steel Columns Subjected to Vehicle Impact

Cited by 12 publications

References 42 publications

Modelling impact resistance of polymer-laminated steelwork

Modelling impact resistance of polymer-laminated steelwork

Experimental study of CFRP strengthened steel columns subject to lateral impact loads

CFRP strengthened CFST columns under vehicular impact

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