A Comparative Study of Failure Criteria Between Bamboo-Grid and Bamboo-Nailed Reinforced Hill Slope Based on Nonlinear Time History Analysis

This study investigates the seismic stability of slopes reinforced with bamboo grids and bamboo nails using a two-dimensional finite element approach. The analysis was performed using a nonlinear time history method to simulate the response of reinforced and unreinforced slopes under seismic loading. Seismic loading was applied using the ground motion data from the 1971 San Fernando earthquake, characterized by a peak ground acceleration of 0.1563 g over a duration of 61.86 s. The analysis compared unreinforced (UR), bamboo grid-reinforced (BG), and bamboo nail-reinforced (BN) slope models. Results indicate that the BG model achieved the highest stability, with a 46% reduction in total displacement, 46.41% reduction in horizontal displacement, and 47% reduction in vertical displacement compared to the UR model. The BN model provided a more moderate improvement, reducing total displacement by 10.5% and horizontal displacement by 11.17%. The UR slope exhibited the greatest deformation and settlement rate, especially at later time stages, while the BG slope showed the least. These findings highlight the effectiveness of bamboo grids in enhancing seismic slope stability.