Reevaluation of the seismic resistance of coastal areas in the event of large-scale serial ocean trench earthquakes, with a consideration of foundation reinforcement technologies

日本的许多重要基础设施都位于软土地基上，如冲积平原和沿海人工填海地基，预计会发生广泛的地震破坏。本研究试图重新评估在大规模系列海沟地震的情况下，考虑地基加固技术的沿海地区的抗震能力。现有的破坏预测方法主要集中在地震过程中的地震稳定性评估，并不足以预测地震后不可避免地发生的持续的长期地面沉降。使用新的数值技术来评估系统中天然和人工土壤的地震和震后抵抗能力，与现有方法并行，它不仅负责提高精度，而且还负责防止对严重地震破坏的忽视。

Many important infrastructures in Japan are located on the soft ground, such as Alluvial plain and coastal artificial reclaimed ground where extensive seismic damages are expected to occur. This research tries to reevaluate the seismic resistance of coastal areas in the event of large-scale serial ocean trench earthquakes with a consideration of ground reinforcement technologies. Existing damage prediction methods focus primarily on seismic stability assessment during an earthquake and are inadequate to forecast ongoing long-term ground settlement which inevitably occurs after an earthquake. To use a new numerical technology to evaluate the seismic and post-seismic resistance capabilities of natural and artificial soils in systems, in parallel with the existing methods, it will be responsible not only for a accuracy enhancement but also for preventing oversight of the serious seismic damages.