Probabilistic study of premature shear failure of slender reinforced concrete one-way slabs subjected to blast loading

Blast-loaded reinforced concrete (RC) slabs should fail under a ductile bending mechanism enabling high energy absorption capacity. Hence, brittle shear failure must be avoided. However, due to the uncertainties related to the materials, geometry, and resistance models, it may be difficult to predic...

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Bibliographic Details
Published in:	Frontiers of Structural and Civil Engineering Vol. 19; no. 8; pp. 1334 - 1354
Main Authors:	LOZANO, Fabio, JOHANSSON, Morgan, LEPPÄNEN, Joosef, PLOS, Mario
Format:	Journal Article
Language:	English
Published:	Beijing Higher Education Press 01.08.2025 Springer Nature B.V
Subjects:	Bending Blast blast loading Blast loads Building codes Cities Civil Engineering Concrete slabs Concrete structures Confidence intervals Countries Ductile-brittle transition Energy absorption Engineering Failure mechanisms Failure modes model uncertainty Monte Carlo method Monte Carlo simulation premature shear failure Regions Reinforced concrete reinforced concrete slabs Research Article Shear Statistical analysis Uncertainty model uncertainty Monte Carlo method premature shear failure reinforced concrete slabs blast loading
ISSN:	2095-2430, 2095-2449, 2095-2449
Online Access:	Get full text
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Summary:	Blast-loaded reinforced concrete (RC) slabs should fail under a ductile bending mechanism enabling high energy absorption capacity. Hence, brittle shear failure must be avoided. However, due to the uncertainties related to the materials, geometry, and resistance models, it may be difficult to predict which failure mode will prevail. This study analytically estimated the probability of premature flexural shear failure of slender RC one-way slabs subjected to blast loading considering such uncertainties and using the Monte Carlo method. The resistance models in Eurocode 2 were adopted. Specimens with and without shear reinforcement were analyzed. Bending failure was shown to be the most likely failure mode in the studied slabs. However, the probability of shear failure developing before bending failure was still relatively high, particularly for slabs without stirrups. To increase the confidence level concerning the preferred failure mechanism, the article proposes an overstrength factor to magnify the shear demand of the blast-loaded RC slab. Values of the overstrength factor for different target reliability levels were calculated. The study also found that the probability of premature shear failure increased with increasing amount of longitudinal reinforcement and decreasing slenderness. Likewise, greater impulse was found to enhance the risk for shear failure.
Bibliography:	model uncertainty Monte Carlo method Document accepted on :2025-04-18 premature shear failure reinforced concrete slabs blast loading Document received on :2025-02-07 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14
ISSN:	2095-2430 2095-2449 2095-2449
DOI:	10.1007/s11709-025-1205-4