Importance factor for design of bridges against fire hazard

Kodur, Venkatesh; Naser, M.Z.

doi:10.1016/j.engstruct.2013.03.048

Cited by 68 publications

(32 citation statements)

References 12 publications

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“…The five classes, parameters, and sub-parameters are listed in Table 2. Based on engineering judgment and recommendations of previous studies [1,2,9,10,[16][17][18]23,24,25] weightage factors are assigned to different sub-parameters. These weightage factors (φ i , x ), are assigned on a scale of 1 to 5 based on the critical influence of that sub-parameter to fire performance of structural member or impact to fire, are shown in Table 2.…”

Section: Methodology Of the Proposed Approachmentioning

confidence: 99%

“…The previously developed fire-based importance factor for girders is expanded to cover all components of a bridge [10]. In addition, the revised importance factor accounts for additional features that influence fire performance of bridges.…”

Section: Importance Factor For Bridges Based On Fire Riskmentioning

confidence: 99%

“…In addition, Wardhaua and Hadipriono [8] as well as Scheer [9] showed that 3.2% and 4.9% of total bridge population experienced some level of collapse due to fire, respectively. Similarly, Kodur et al [1,10] reviewed recent bridge fire incidents and concluded that bridge fires can lead to major structural damage or collapse of bridges. However, no structural fire design provision for bridges currently exists in codes and standards.…”

Section: Introductionmentioning

confidence: 97%

“…In a previous study, Kodur and Naser proposed an importance factor for classification of bridge girders based on fire hazard [10]. The proposed importance factor considers only bridge girders to be vulnerable to fire, and does not take into consideration possible weakness of other super and sub-structural components of bridges to fire.…”

Section: Introductionmentioning

confidence: 99%

“…Only critical bridges, from the point of fire hazard, may have to be designed for fire safety. Identification of such critical bridges can be done through the use of fire-based importance factor similar to that used for evaluating snow or wind loading in the design of buildings [10].…”

Section: Introductionmentioning

confidence: 99%

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A probabilistic assessment for classification of bridges against fire hazard

Naser

Kodur

2015

Fire Safety Journal

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a b s t r a c tThis paper presents the development of a simplified approach for classification of bridges based on fire hazard. Statistical data from recent fires in bridges is utilized to quantify the probable risk of fire in bridges and also probability of fire-induced collapse of structural members in bridges. An importance factor is derived for identifying the vulnerability of bridges to fire hazard. The proposed importance factor, developed using weighted factor approach, takes into account the degree of vulnerability of different bridge components, critical nature of a bridge from traffic functionality point and fire mitigation strategies present in a specific bridge. The proposed importance factor for fire design, which is similar to the one currently used for evaluating wind, and snow loading in buildings, is validated against previous bridge fire incidents. It is shown through this validation that the proposed method for importance factor can be used as a practical tool for identifying critical bridges from the point of fire hazard.

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