What question did this study set out to answer?

To develop a pre-event-reference-free, non-destructive methodology using terrestrial laser scanning to estimate post-fire flexural stiffness loss in reinforced concrete members from residual geometry.

September 17, 2026InfrastructuresOpen Access

Pre-Event-Reference-Free TLS-Based Geometric Condition Assessment of Post-Fire RC Flexural Members

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Authors

RCRubén Cano-Marín AMAntonio Morales‐Esteban MRMaría-Victoria Requena-García-Cruz

Discussion

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Overview

Observational assessment reveals residual stiffness losses in fire-damaged concrete flexural members using laser scanning, indicating a reliable pre-event-reference-free screening method.

Key Points

To develop a pre-event-reference-free, non-destructive methodology using terrestrial laser scanning to estimate post-fire flexural stiffness loss in reinforced concrete members from residual geometry.
Acquired terrestrial laser scanning point clouds of a fire-affected one-way ribbed slab, filtering, rasterizing, and normalizing data against fitted regression planes.
Statistically analyzed orthogonal plane deviations to establish a geometric condition indicator (DI) based on point concentration differences between homologous structural members.
Calculated beam deflection increases and prestressed joist camber losses relative to undamaged equivalent members to derive an apparent deformation-based stiffness-change index (KΔ).
Geometric condition indicators showed strong monotonic associations with apparent stiffness change, yielding Spearman coefficients of −0.82 for beams and 0.92 for prestressed joists.
Beams exhibiting increased deflection and prestressed joists with reduced camber experienced mean apparent relative stiffness losses of 32.7% and 36.7%, respectively.

Cite This Study

Cano-Marín et al. (2026) studied this question.

synapsesocial.com/papers/6aabb75d5f706d05830e66c1 https://doi.org/10.3390/infrastructures11090329

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September 17, 2026InfrastructuresOpen Access

Pre-Event-Reference-Free TLS-Based Geometric Condition Assessment of Post-Fire RC Flexural Members

View Full Paper

Ask AI

Bookmark

Authors

RCRubén Cano-Marín AMAntonio Morales‐Esteban MRMaría-Victoria Requena-García-Cruz

Discussion

Member takes

Overview

Observational assessment reveals residual stiffness losses in fire-damaged concrete flexural members using laser scanning, indicating a reliable pre-event-reference-free screening method.

Key Points

To develop a pre-event-reference-free, non-destructive methodology using terrestrial laser scanning to estimate post-fire flexural stiffness loss in reinforced concrete members from residual geometry.
Acquired terrestrial laser scanning point clouds of a fire-affected one-way ribbed slab, filtering, rasterizing, and normalizing data against fitted regression planes.
Statistically analyzed orthogonal plane deviations to establish a geometric condition indicator (DI) based on point concentration differences between homologous structural members.
Calculated beam deflection increases and prestressed joist camber losses relative to undamaged equivalent members to derive an apparent deformation-based stiffness-change index (KΔ).
Geometric condition indicators showed strong monotonic associations with apparent stiffness change, yielding Spearman coefficients of −0.82 for beams and 0.92 for prestressed joists.
Beams exhibiting increased deflection and prestressed joists with reduced camber experienced mean apparent relative stiffness losses of 32.7% and 36.7%, respectively.

Cite This Study

Cano-Marín et al. (2026) studied this question.

synapsesocial.com/papers/6aabb75d5f706d05830e66c1 https://doi.org/10.3390/infrastructures11090329

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