Structural response of simple partially-clad steel frames to long-duration blast loading

Cannon, Laura; Clubley, Simon K.

doi:10.1016/j.istruc.2021.03.024

Cited by 8 publications

(2 citation statements)

References 14 publications

(16 reference statements)

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“…The events in Beirut are not unprecedented; there have been many recent large scale industrial explosions ( 10 tonnes TNT equivalent) in built-up areas [56], including Tianjin, China (2015; 173 deaths), and Buncefield, UK (2005; 43 injuries). Accordingly, the structural response to long-duration blast loading is an ongoing topic of interest, particularly for structures sensitive to such loads, e.g., bare steel sections [72,73], partially-clad steel frames [74], cylindrical shell structures [75,76], ISO containers [77], and bridges [78]. Accurately simulating long-duration blasts and their interaction with structural components several times smaller than the blast wavelength is highly challenging and requires considerable computational expense [79,80].…”

Section: Large Magnitude Urban Blastmentioning

confidence: 99%

A Review of Blast Loading in the Urban Environment

et al. 2023

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Urban blasts have become a significant concern in recent years. Whilst free-field blasts are well understood, the introduction of an urban setting (or any complex geometry) gives rise to multiple blast wave interactions and unique flow complexities, significantly increasing the difficulty of loading predictions. This review identifies commonly agreed-upon concepts or behaviours that are utilised to describe urban shock wave propagation, such as channelling and shielding, in conjunction with exploring urban characterisation metrics that aim to predict the effects on global blast loading for an urban blast. Likewise, discrepancies and contradictions are highlighted to promote key areas that require further work and clarification. Multiple numerical modelling programmes are acknowledged to showcase their ability to act as a means of validation and a preliminary testing tool. The findings contained within this review aim to inform future research decisions and topics better.

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Section: Large Magnitude Urban Blastmentioning

confidence: 99%

A Review of Blast Loading in the Urban Environment

et al. 2023

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“…In September 2017, five people were killed and more than 30 injured in a bombing at Parsons Green Underground station in west London, as well as a subway station bombing in Belarus. The positive pressure region of the shock wave generated by these explosion events can be as high as 10 2 ~10 3 ms, belonging to the long-pulse-width explosion load [1][2][3]. Long-duration blast waves are typically defined by positive pressure durations over 100 ms, which develop in later stages of shock wave propagation, i.e., in the 'far field' from the source of detonation.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response Analysis Method of a High-Strength RC Beam Subjected to Long-Duration Blast Loading

Zhao,

Zeng,

Feng

et al. 2024

Buildings

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An analysis method of normalized pressure–impulse (P-I) diagrams related to the ductility ratio of structural components is proposed, to quickly estimate the dynamic response of high-strength reinforcement concrete (RC) beams subjected to long-duration blast loading. Firstly, the overall bending deformation mode of RC beams is uncovered via explosion tests in a closed chamber, where the durations of the near-planar blast loadings are varied within 80–105 ms. Then, a single-degree-of-freedom (SDOF) model is established based on the bending deformation mode. The resistance function for the uniform pressure loading is developed using a novel approach, consisting of (1) developing and benchmarking a three-dimensional (3D) improved steel–concrete separated finite-element (FE) model; (2) using the benchmarked FE model to conduct numerical simulations for uniform pressure loading; and (3) idealizing the resistance function for uniform pressure using a bilinear relationship. Finally, the SDOF model is used to conduct parametric analyses and develop a normalized P-I diagram that can be used to analyze or design RC beams for far-field blast effects. This P-I diagram is verified using results from blast load tests that are primarily in the dynamic region. A total of 188 additional 3D nonlinear FE analyses of RC beams are conducted to expand the database in the impulse and quasi-static regions. Considering the limitations of the proposed method in predicting the shear-dominated deformation and the fracture behavior of members, the P-I diagram is applicable to the dynamic response of the bending deformation of members under far-field explosion, which can provide an important reference for the blast-resistant design and analysis of high-strength RC beams.

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