What question did this study set out to answer?

To assess structural damage patterns, failure mechanisms, and systemic seismic fragility across transportation networks impacted by a major earthquake.

September 17, 2026Earthquake Spectra

Seismic Performance and Damage Assessment of Transportation Systems During the 2025 Myanmar Earthquake (M7.9)

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Authors

YHYong HuangHunan University HHHe HuaChina Earthquake Administration MDMa DebaoChina Earthquake Administration

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Overview

Field investigation reveals severe vulnerability in aging railway bridges and fault-driven displacement in highway structures, highlighting urgent needs for targeted seismic retrofitting.

Key Points

To assess structural damage patterns, failure mechanisms, and systemic seismic fragility across transportation networks impacted by a major earthquake.
Conducted a 14-day post-earthquake field survey across affected regions to construct a bridge damage database.
Generated simulated ground motion fields to compensate for scarce near-fault recordings and modeled failure mechanisms for 18 damaged bridges using the spectral element method.
Performed regional statistical fragility analyses to establish ground shaking thresholds across highway and railway structural systems.
Structural damage orientation was dictated by the relative dominance between fling-step and rupture directivity effects, compounded by valley soil liquefaction and lateral spreading.
Highway bridges exhibited median peak ground acceleration thresholds above actual seismic demands, with damage primarily limited to bearing sliding, girder collisions, and pier plastic hinging.
Older railway bridges showed severe vulnerability, reaching moderate damage at a median peak ground acceleration of 0.48 g due to masonry degradation and universal steel truss girder damage.

Cite This Study

Huang et al. (2026) studied this question.

synapsesocial.com/papers/6aabb7e75f706d05830e73f6 https://doi.org/10.1002/esp4.70121

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September 17, 2026Earthquake Spectra

Seismic Performance and Damage Assessment of Transportation Systems During the 2025 Myanmar Earthquake (M7.9)

View Full Paper

Ask AI

Bookmark

Authors

YHYong HuangHunan University HHHe HuaChina Earthquake Administration MDMa DebaoChina Earthquake Administration

Discussion

Member takes

Overview

Field investigation reveals severe vulnerability in aging railway bridges and fault-driven displacement in highway structures, highlighting urgent needs for targeted seismic retrofitting.

Key Points

To assess structural damage patterns, failure mechanisms, and systemic seismic fragility across transportation networks impacted by a major earthquake.
Conducted a 14-day post-earthquake field survey across affected regions to construct a bridge damage database.
Generated simulated ground motion fields to compensate for scarce near-fault recordings and modeled failure mechanisms for 18 damaged bridges using the spectral element method.
Performed regional statistical fragility analyses to establish ground shaking thresholds across highway and railway structural systems.
Structural damage orientation was dictated by the relative dominance between fling-step and rupture directivity effects, compounded by valley soil liquefaction and lateral spreading.
Highway bridges exhibited median peak ground acceleration thresholds above actual seismic demands, with damage primarily limited to bearing sliding, girder collisions, and pier plastic hinging.
Older railway bridges showed severe vulnerability, reaching moderate damage at a median peak ground acceleration of 0.48 g due to masonry degradation and universal steel truss girder damage.

Cite This Study

Huang et al. (2026) studied this question.

synapsesocial.com/papers/6aabb7e75f706d05830e73f6 https://doi.org/10.1002/esp4.70121

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