In 2021, Miyagi Stadium suffered extensive damage from an earthquake off the coast of Miyagi Prefecture—exceeding even the impact of the Great East Japan Earthquake. In response, a comprehensive investigation was conducted, followed by meticulous renovation work to restore and reinforce the stadium.
While the primary objective was to restore the stadium to its original condition, additional safety enhancements were implemented to improve its resilience against future seismic events.
Key Recovery and Reinforcement Measures:
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Cantilevered Stand Restoration: To prevent in-plane buckling caused by phase differences in ground vibrations, newly installed planar slits were placed at both ends of the renovation area. Additionally, RC beams at the tips of the cantilevered girders were reinforced with steel to enhance durability and structural stability.
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Shear Reinforcement for Safety: Upon discovering widespread cracks in cantilevered girders beyond the initially planned renovation scope, further structural assessments were conducted. Crack repairs were followed by carbon fiber shear reinforcement, significantly improving the overall safety of the stands.
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Comprehensive Repairs & Upgrades: Structural elements and finishing materials throughout the stadium underwent extensive restoration and reinforcement, ensuring a safer and more resilient facility for future use.
With these measures, Miyagi Stadium has been rebuilt to withstand future seismic events, providing a safer and more secure environment for athletes, spectators, and the broader community.
