What does this research mean for the field?

Applying a 3D-2D correction factor, moment connections, and an at-rest lateral earth pressure coefficient of 0.50 provides more realistic load rating values for reinforced concrete box culverts that better reflect actual field conditions compared to standard 2D models. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To develop a modified and realistic load rating procedure for aging cast-in-place reinforced concrete box culverts by correlating 2D and 3D structural models.

August 22, 2026Bridge Structures

Modified load rating procedure for cast-in-place reinforced concrete box culverts in Louisiana

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Authors

MSMohsen Shahawy ZLZhiyong Liang MGMohammad Mahdi Sabouri Ghannad

Discussion

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Overview

Parametric modeling study reveals improved load rating factors in concrete box culverts, suggesting standard two-dimensional models underestimate real-world capacity.

Key Points

To develop a modified and realistic load rating procedure for aging cast-in-place reinforced concrete box culverts by correlating 2D and 3D structural models.
Conducted a parametric analysis using 120 3D finite element models across diverse configurations alongside corresponding 2D frame element models.
Evaluated pinned versus moment wall-slab connections and performed field testing on representative culverts to validate the numerical models.
Established correction factors to correlate moment values between simplified 2D frame element models and complex 3D plate element models.
Demonstrated that applying moment connections, an at-rest lateral earth pressure coefficient (k_o = 0.50), and 3D-to-2D correction factors yields realistic load rating values matching field conditions.

Cite This Study

Shahawy et al. (2026) studied this question.

synapsesocial.com/papers/6a895eeeca7ade938187d299 https://doi.org/10.1177/15732487261478727

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August 22, 2026Bridge Structures

Modified load rating procedure for cast-in-place reinforced concrete box culverts in Louisiana

View Full Paper

Ask AI

Bookmark

Authors

MSMohsen Shahawy ZLZhiyong Liang MGMohammad Mahdi Sabouri Ghannad

Discussion

Member takes

Overview

Parametric modeling study reveals improved load rating factors in concrete box culverts, suggesting standard two-dimensional models underestimate real-world capacity.

Key Points

To develop a modified and realistic load rating procedure for aging cast-in-place reinforced concrete box culverts by correlating 2D and 3D structural models.
Conducted a parametric analysis using 120 3D finite element models across diverse configurations alongside corresponding 2D frame element models.
Evaluated pinned versus moment wall-slab connections and performed field testing on representative culverts to validate the numerical models.
Established correction factors to correlate moment values between simplified 2D frame element models and complex 3D plate element models.
Demonstrated that applying moment connections, an at-rest lateral earth pressure coefficient (k_o = 0.50), and 3D-to-2D correction factors yields realistic load rating values matching field conditions.

Cite This Study

Shahawy et al. (2026) studied this question.

synapsesocial.com/papers/6a895eeeca7ade938187d299 https://doi.org/10.1177/15732487261478727

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