Displacement-based blast-resistant evaluation for simply-supported RC girder bridge under below-deck explosions

Ma, Liangliang; Wu, Haiyan; Fang, Qin; Xu, Jiapei

doi:10.1016/j.engstruct.2022.114637

Cited by 7 publications

(2 citation statements)

References 21 publications

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“…Based on Refs., [31][32][33][34] the article shows the TNT equivalent of explosions caused by standard vehicles in Table 5. From the statistics, five working conditions were designed, with the height of the explosion center set at 1 m based on the average height of the vehicle.…”

Section: Methodsmentioning

confidence: 99%

Application of steel fiber concrete in small box girder under vehicle explosion load

Wang,

Chen,

Wang

et al. 2023

Journal of Engineered Fibers and Fabrics

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In recent years, the exceptional performance of steel fiber-reinforced concrete in blast and impact resistance has garnered widespread recognition, sparking considerable interest in its practical application in small box girders. To this end, nine groups of Trinitrotoluene (TNT) explosion simulation experiments were designed with the equivalent magnitudes matching those of actual automobile explosions to evaluate the anti-explosion and anti-penetration capabilities of steel fiber-reinforced concrete and ordinary concrete using the Arbitrary Lagrangian-Eulerian (ALE) method and the Smoothed Particle Hydrodynamics-ALE method. The aim was to explore the application prospects of steel fiber-reinforced concrete in small box girders. The research results demonstrate that with increasing TNT equivalent, the leading cause of breach to concrete slabs changes from spalling to cratering. The penetration resistance of steel fiber-reinforced concrete slabs is superior to its blast resistance. However, when the explosive force is larger than the sedan, the anti-explosion effect of steel fiber-reinforced concrete slabs becomes negligible. Moreover, under typical automobile explosion loads, the addition of 2% steel fibers can reduce spalling by up to 23% and cratering by up to 13% and can decrease the area of penetration damage by up to 47%. In designing blast-resistant structures, steel fiber-reinforced concrete is not recommended to enhance the blast resistance of bridges when the TNT equivalent exceeds 500 kg.

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Section: Methodsmentioning

confidence: 99%

Application of steel fiber concrete in small box girder under vehicle explosion load

Wang,

Chen,

Wang

et al. 2023

Journal of Engineered Fibers and Fabrics

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“…Once the structure is damaged, the bearing capacity and service life of the stiffened beam will be reduced. In the analysis of the anti-blast performance of bridges, the coupling effect of a vehicle load is seldom studied, and the effect of a single blast load is still the main focus of research at present [14][15][16]. Chen et al [17] conducted experimental and numerical simulation studies on the performance of welded steel column joints in bridges.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of a Box Multistage Stiffened Beam under the Coupling of Vehicle Load and Air Blast Load

Ma,

Gao,

et al. 2023

Buildings

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If a bridge is subjected to a blast load when there is vehicle traffic, not only its own safety is threatened, but it can also lead to damage to vehicles. In addition, the coupling of a vehicle load and an explosion load may further aggravate the impact of an explosion. To understand the coupling relationship between the two kinds of loads on a bridge, a static load was applied on the bridge using the impact coefficient while a blast load was applied on the outside of the bridge. A numerical simulation was also used to further study the coupling effect of the vehicle load and the explosion load. The results showed that the vehicle load could effectively limit the vertical deformation. The numerical model was accurate in predicting the response process of the stiffened beam. With the coupling of the vehicle load, the equivalent plastic strain of the box multistage stiffened beam was mainly concentrated at the hinge and decreased when the blast loading remained constant. The transverse anti-blast performance of the stiffened beam was mainly provided by the bridge web and the diaphragm under the coupling effect of the vehicle load and the blasting load, but the function of the diaphragm was weakened. Additionally, the hinge used as a connector was able to directly affect the bearing capacity of the bridge. Even if the hinge was only slightly damaged, it could cause the bridge to enter the failure stage, meaning that the strength of the hinge must be greater than that of the bridge.

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Failure mode and response of a typical RC straight and skew highway girder bridge under the blast, wrapped with and without a non-Explosive Reactive armour using FEM-SPH coupling

Saha,

karmakar

2024

Engineering Failure Analysis

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Displacement-based blast-resistant evaluation for simply-supported RC girder bridge under below-deck explosions

Cited by 7 publications

References 21 publications

Application of steel fiber concrete in small box girder under vehicle explosion load

Application of steel fiber concrete in small box girder under vehicle explosion load

Dynamic Response of a Box Multistage Stiffened Beam under the Coupling of Vehicle Load and Air Blast Load

Failure mode and response of a typical RC straight and skew highway girder bridge under the blast, wrapped with and without a non-Explosive Reactive armour using FEM-SPH coupling

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