Dynamic discrete analysis of an earthquake-induced large-scale landslide

DDA validation of the mobility of earthquake-induced landslides

“…In this method, the seismic accelerations were applied to the base block, which was different from the former seismic loading input model. Wu et al (2009), Wu (2010, Wu and Chen (2011) and Wu and Tsai (2011) applied the DDA to simulate the kinematic behavior of sliding rock blocks in the Tsaoling landslide and the Chiu-fen-erhshan landslide, which were induced by the 1999 Chi-Chi earthquake.…”

Seismic landslide simulations in discontinuous deformation analysis

“…Additionally, Wu and Lin [22] developed an approach that integrates accelerograph and GPS data to back-calculate the mechanical properties of the sliding surface of the Chiu-fen-erh-shan landslide slope when cohesion is 0 kPa and the internal friction angle is 24.8°. Wu et al [23] used seismic DDA with Method 3 and baseline-corrected time-dependent ground movement to investigate post-failure behavior of the Chiu-fen-erh-shan landslide slope during the Chi-Chi earthquake.…”

“…Fig. 10 shows the geometry of the Chiu-fen-erh-shan landslide, which is largely divided into stable base rock at the bottom and sliding rocks on the base rock slope, for DDA [23]. Fig.…”

“…11c reveals the downward co-seismic permanent ground displacement at TCU072, even though the accelerograph station is located on the hanging wall of the reverse thrust Chelungpu fault [22]. Wu and Lin [22] and Wu et al [23] utilized neighboring GPS data to validate the correctness of baseline corrections applied to TCU072 data. The corrected displacement-time curve (Fig.…”

“…13a) (Method 2) and time-dependent displacements (Fig. 13b) [23] (Method 3) of the base rock. The 20-s preevent data are removed in this study, and a total of 70 s of seismic data are applied to Chiu-fen-erh-shan simulations.…”