[H-DS08] Landslides and related phenomena

[HDS08-P14] Numerical analysis on the failure of landslide dam resulting from seepage-induced stiffness degradation

*Raden Harya Dananjaya^1,2, Gonghui Wang¹ (1.Kyoto University, 2.Department of Civil Engineering, Universitas Sebelas Maret, Indonesia)

Keywords:Landslide disaster, Smoothed Particle Hydrodynamics, landslide dam, Soil-water hydromechanical coupling model

Landslide is a prominent disaster in hilly areas; it can harm the environment and people. The need to understand failure mechanisms of slope for countermeasure is urgently needed. In this research, a numerical method will be used to examine the failure mechanism of a landslide dam. both serial and parallel SPH-based codes were developed and their performances were examined. Subsequently, a Kleefsman’s dam break test code was conducted numerically, and its experimental data sheets were used to validate the code. The result shows that the GPU parallel code increases performance by more than ten times faster than its serial CPU code. Moreover, in Kleefsman’s dam break test, no obvious difference was found in both numerical and experimental results, although our code has a lag time of around 0.06 s.