ABSTRACT
This study explores the seismic performance of AI-optimized Engineered Cementitious Composites (ECC) in tunnel linings, comparing it with conventional shotcrete under dynamic conditions. Using a 2D finite element model, ground motions with a peak acceleration of 0.4g were applied to linings of 50mm, 100mm, and 150mm thickness. Results revealed ECC’s superior resilience, significantly reducing tension damage by 2.3% (0.84 vs. 0.86), in-plane plastic strain by 83.3% (0.01 vs. 0.06), and out-of-plane strain by 50%. ECC improved stability, cutting horizontal accelerations by 59.2% (-1.2g vs. -2.8g) and vertical accelerations by 46.7%. Settlement was reduced by 56.2%, with ECC showing 14mm compared to shotcrete’s 32mm. These findings highlight ECC’s ability to enhance seismic safety, reduce maintenance, and extend tunnel lifespans. By incorporating ECC, we can build more resilient infrastructure, ensuring safer and more reliable tunnels in earthquake-prone regions.
