Recent research on the seismic response of assembled monolithic subway stations has unveiled critical insights that could reshape the construction and engineering sectors, particularly in earthquake-prone regions. Conducted by Yu Miao from the School of Civil and Hydraulic Engineering at Huazhong University of Science and Technology, this study addresses a significant gap in understanding how vertical ground motion and aboveground structures affect subway systems during seismic events.
As urban populations grow and infrastructure needs expand, the demand for resilient transportation systems becomes paramount. Miao’s research highlights the unique advantages of assembled monolithic subway stations, which blend the benefits of traditional cast-in-place and precast designs. However, the study exposes vulnerabilities that could impact the safety and longevity of these structures. “Our findings indicate that significant damage to the subway stations primarily occurs at the side middle slab, with upper columns and grouting sleeve joints being particularly susceptible,” Miao noted.
The study utilized advanced statistical analyses of bedrock ground motion parameters and generated artificial seismic motions to simulate real-world conditions. The results revealed that far-field ground motions tend to cause more damage than near-fault motions, a critical insight for engineers tasked with designing structures that can withstand various seismic scenarios. Moreover, the research found that vertical ground motion can accelerate damage progression, particularly when combined with the stresses imposed by aboveground structures. This interplay can lead to increased vertical displacement responses in the top slabs of subway stations.
Miao emphasized the implications of these findings for future construction projects, stating, “Understanding the interaction between vertical ground motion and aboveground structures is essential for improving the seismic resilience of subway systems.” This insight could lead to more robust design protocols, ultimately enhancing the safety of public transportation networks.
As cities continue to evolve, the construction sector must adapt to these insights to ensure infrastructure can withstand the challenges posed by natural disasters. The research not only informs better design practices but also has commercial implications, potentially influencing decisions in urban planning and investment in resilient infrastructure.
Published in ‘Underground Space’, or “Underground Space” in English, this study serves as a vital resource for engineers, architects, and policymakers alike. As the industry moves toward more integrated and resilient design approaches, the findings from Miao’s research could pave the way for enhanced safety standards and innovative construction practices in subway systems worldwide. For those interested in exploring this research further, more information can be found at lead_author_affiliation.
