Experimental Investigation of Seismically Resistant Bridge Piers under Blast Loading

Fujikura, Shuichi; Bruneau, Michaël

doi:10.1061/(asce)be.1943-5592.0000124

Cited by 92 publications

(58 citation statements)

References 7 publications

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“…RC columns also undergo lateral deformations when subjected to cyclical loading in the event of an earthquake. Many researchers (Bao and Li 2010;Flores 2004;Fujikura and Bruneau 2011;Hayes et al 2005;Williams and Williamson 2011) have done various works on seismically detailed RC components subjected to blast and reported improved performances over conventionally designed RC components. The research presented in this thesis focuses on the performance of RC columns detailed in accordance with the Canadian seismic detailing rules outlined clause 21 of CSA A23.3-04 (CSA, 2004).…”

Section: Thesis Outlinementioning

confidence: 99%

“…also tested reinforced concrete columns detailed for seismic resistance in accordance with ACI code to study the residual capacity of RC columns subjected to contact explosions and axial loads Wu et al (2011a). also limited their research to close-in explosions and did not investigate the performance of the RC columns under varying blast loading standoff distances.Many researchers(Fujikura and Bruneau 2011;Williams and Williamson 2011;Williamson et al 2010;Winget et al 2005) have also studied the performance of bridge piers under blast loading Fujikura et al (2008). studied the effects of blast loading on multi-hazard bridge piers; designed for both seismic and blast loading.…”

mentioning

confidence: 99%

“…The research was conducted on ¼scaled bridge piers made of concrete-filled Steel Tubes (CFST). The results were compared to an equivalent SDOF system with elasto-plastic behaviour, with the CFST columns showing ductile behaviour under blast loading Fujikura and Bruneau (2011). went on further to investigate the performance of seismically ductile RC bridge columns and conventional RC bridge columns retrofitted with steel jackets.…”

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Effects of Blast Loading on Seismically Detailed Reinforced Concrete Columns

Kyei¹

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The rise in the number of terrorist attacks over the past few decades has led to growing concerns about the performance of buildings designed by well-established conventional design methods under blast loading. The concerns arise from the response of buildings and loss of lives in some of the more popular terrorist attacks such as those involving the Alfred P. Murrah Building, the Khobar Towers, and Marriott Hotel in Islamabad. Whereas most damage during these attacks was to non-structural elements such as infill wall systems and window glass, the collapse of the Alfred P. Murrah Building revealed that failure of load-bearing members can lead to widespread buildings failure. Thus, it has become imperative to investigate the performance of load-bearing building members to blast loading. More specifically, to quantify the blast resistance offered by buildings designed and detailed for other load types such as wind and earthquake.The effect of seismically detailed reinforced concrete columns on their blast resistance was investigated. Reinforced concrete columns not forming part of the seismic force resisting system were detailed according to CSA A23.3-04 -Design of Concrete Structures. The detailed reinforced concrete columns were subjected to blast loading in a numerical study using the high fidelity physics based finite element code (LS-DYNA). The numerical study was undertaken to investigate the effects of columns designed for different levels of seismicity in the National Building Code of Canada (NBCC) on their blast resistance.The results of the numerical study show that the lateral reinforcement detailing has a significant effect on the behaviour of columns under blast loading. When the reinforced concrete columns were detailed for high levels of seismicity by reducing the lateral reinforcement spacing in the plastic hinge region, the maximum lateral displacement was observed to reduce significantly in comparison with columns detailed with lateral reinforcement spaced for conventional design.ii Also, reducing the lateral reinforcement spacing at mid-height of the column, where plastic hinge formations is expected under blast loading, further reduced the maximum lateral displacement.The closely spaced lateral reinforcement in the seismically-detailed columns was observed to increase the blast resistance, especially to close-in blast loading.The effect of axial loading was also investigated in the numerical study. As the axial load ratio increased, the blast resistance of the concrete columns increased. However, at high, axial load ratios, the columns suffered concrete crushing in the compression zone leading to higher lateral displacements and instability. At higher scaled distances, increasing axial load ratios resulted in reduced maximum lateral displacements; with the seismically-detailed columns not offering any significant advantage over the conventionally-detailed columns.iii

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confidence: 99%

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confidence: 99%

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Effects of Blast Loading on Seismically Detailed Reinforced Concrete Columns

Kyei¹

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“…Pan et al [6] investigated three modern types of reinforced concrete bridges under various blasting loads, including a slab-on-girder bridge, a box-girder bridge, and a long-span cable-stayed bridge and discussed the protection performance of carbon fiber-reinforced polymer on bridges. Fujikura and Bruneau [7] studied the blast resistance of steel jacketing bridge piers by experiments. Li and Hao [8] analyzed steel wire mesh-reinforced concrete slab under contact explosion.…”

Section: Introductionmentioning

confidence: 99%

Research of Steel‐Concrete Composite Bridge under Blasting Loads

2018

Advances in Civil Engineering

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is paper presents a study to simulate the performance of steel-plate composite bridge under various blasting loads. e multi-Euler domain method based on the fully coupled Lagrange and Euler models is adopted for the structural analysis of explosion process with the commercial software Autodyn. Due to the difference of material characteristics and space distribution between the concrete and steel part, the most adverse position is estimated to be above and below detonation. A remarkable difference between these two explosive denotations for steel-concrete composite bridge is noted, and the failure mode above denotation is the damage of local concrete deck, with the compression mode near the denotation point showing a standard trigonometric curve. e failure mode below denotation includes damage of steel girders and concrete failure near junction.

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“…In this respect, most tests were conducted on reduced scale models [6][7][8][9] as testing on full scale models is both costly and hazardous [10,11]. Fujikura and Bruneau (2011) [7] conducted ductility testing for ordinary and non-ductile steel-strengthened reinforced-concrete piers in order to determine their resistance to explosions, but none of the pier types tested exhibited ductile behaviour when subjected to load. In fact, failure occurred due to shear at the pier bottom, which was contrary to the assumed bending failure scenario.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of effect of explosive action on overpasses

2017

JCE

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Numerical simulation of effect of explosive action on overpassesOverpasses can not be made absolutely safe to explosive action, regardless of interventions made during their design and/or realisation. This is due to the fact that the very quantity of explosive to be activated under the bridge during an attack can not be defined with an acceptable level of probability. Three quantities of explosives activated under the overpass structure are analysed. The load, behaviour, and damage to overpass superstructure are considered. It is stated in conclusion that all three quantities of explosive afflict considerable damage to usual overpasses, and cause their collapse. The nonlinear numerical analysis of the overpass was conducted using the Ansys Autodyn hydrocode software. Numerička simulacija djelovanja eksplozije na nadvožnjake Nadvožnjak nije moguće učiniti, projektiranjem i/ili izvedbom, apsolutno sigurnim na djelovanje eksplozije jer se ni sama količina eksploziva koja bi se detonirala ispod mosta u nekakvom napadu ne može odrediti s prihvatljivom vjerojatnošću. U radu je analizirano djelovanje tri količine eksploziva detonirane ispod rasponske konstrukcije nadvožnjaka. Promatrano je djelujuće opterećenje, ponašanje i oštećenje rasponskog sklopa nadvožnjaka. Zaključeno je kako sve tri količine eksploziva znatno oštećuju uobičajeni nadvožnjak te uzrokuju rušenje. Nelinearna numerička analiza nadvožnjaka provedena je koristeći hidrokod softver Ansys Autodyn.

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Experimental Investigation of Seismically Resistant Bridge Piers under Blast Loading

Cited by 92 publications

References 7 publications

Effects of Blast Loading on Seismically Detailed Reinforced Concrete Columns

Effects of Blast Loading on Seismically Detailed Reinforced Concrete Columns

Research of Steel‐Concrete Composite Bridge under Blasting Loads

Numerical simulation of effect of explosive action on overpasses

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