Progressive Collapse of Post-Tensioned Box Girder Bridges under Blast Loads Using Applied Element Method

Ibarhim, Ahmed; Salim, Hani; Rahman, Nabil A.

doi:10.1061/9780784412367.201

Cited by 8 publications

(3 citation statements)

References 9 publications

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“…is bridge type is more frequent in comparison with other types of bridges in the United States. Some parameters including different charge weight and position of explosive charge have been investigated and led to valuable results [11]. Lu and Zhang conducted PC analysis on the pile foundation of a bridge due to ship collision.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Design and Retrofitting Solutions on the Progressive Collapse of Hongqi Bridge

Khoei¹,

Akbari²,

Maalek³

et al. 2020

Shock and Vibration

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In 2009, the Hongqi Bridge, a multispan reinforced concrete bridge located in Zhuzhou, Hunan Province, China, collapsed progressively in the form of domino, due to extreme effect of deck to pier, during demolition process of the bridge. In this study, progressive collapse of Hongqi Bridge was investigated using nonlinear dynamic analysis in the Applied Element Method, which has been proven as one of the best methods that can follow the collapse behavior of structures. Good agreements were obtained between numerical results and field observations as well as previously reported results. After verifying the bridge collapse procedure, the effects of different alternatives for superstructure and substructure systems on the progressive collapse procedure were investigated. In addition, application of restrainers at the connection of deck to abutment was studied as an effective solution in order to prevent collapse propagation and to minimize associated damages. The results of the study showed that all chosen methods and factors could be helpful and effective in the procedure of collapse propagation for this kind of bridge.

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Section: Introductionmentioning

confidence: 99%

Assessment of Design and Retrofitting Solutions on the Progressive Collapse of Hongqi Bridge

Khoei¹,

Akbari²,

Maalek³

et al. 2020

Shock and Vibration

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“…Some research studies have been carried out on the progressive collapse modeling of bridges [3,[10][11][12][13][14]. However, very few of them have studied this kind of collapse under earthquake.…”

Section: Introductionmentioning

confidence: 99%

Earthquake‐Induced Domino‐Type Progressive Collapse in Regular, Semiregular, and Irregular Bridges

Seyedkhoei

Akbari

Maalek

2019

Shock and Vibration

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Progressive collapse is a persistent spread and enlargement of initial local failure of structures characterized by inconsistency between the initial failure and its resulting extensive collapse. Although, great contributions have been made towards the progressive collapse of building structures, comparably small attention has been paid to bridge structures. In this study, the procedure of progressive collapse of bridges with concrete prestressed voided slab under earthquakes and effects of other parameters on propagation of collapse of regular, semiregular, and irregular bridges are investigated. At first, a bridge specimen, which its shake table test results were provided by previous researchers, was modeled and verified using the applied element method. en, the progressive collapse of the box girder bridge was investigated. In the next step, progressive collapse process of the same bridge with posttensioned voided slab under earthquakes was studied using nonlinear time history analysis. Irregularities of the piers were analyzed parametrically. e results show that domino-type progressive collapse happens in bridges with voided slab after the initial failure of the deck at the seating of bridge abutment. Also, it is concluded that, type of the deck, height of the piers, and ground slope have a great effect on the progressive collapse procedure of both regular and irregular bridges with voided slab deck.

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“…In the following paper [21] the authors estimate the bridge damage and possibilities for its strengthening by CFRP (Carbon Fibre Reinforce Polymer) fibres. Yet another numerical method that can be used to simulate structural collapse [22][23][24] following an explosive action is the applied element method (AEM). This method differs from traditional finite-element methods in that the elements forming the structural segment or structure are in fact solid bodies interconnected with springs, which describe internal deformations and stress fields.…”

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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Progressive Collapse of Post-Tensioned Box Girder Bridges under Blast Loads Using Applied Element Method

Cited by 8 publications

References 9 publications

Assessment of Design and Retrofitting Solutions on the Progressive Collapse of Hongqi Bridge

Assessment of Design and Retrofitting Solutions on the Progressive Collapse of Hongqi Bridge

Earthquake‐Induced Domino‐Type Progressive Collapse in Regular, Semiregular, and Irregular Bridges

Numerical simulation of effect of explosive action on overpasses

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