PSI - Issue 28

Abdoullah Namdar / Procedia Structural Integrity 28 (2020) 301–310 Author name / Structural Integrity Procedia 00 (2019) 000–000

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with developed well boundary condition. The geomorphology of a construction site plays a key role to select the shape and size of the embankment model.

Fig. 1. The embankment-subsoil model developed for numerical simulation.

According to figure 2, the magnitude of the acceleration at each direction is different and the nonlinearity of the acceleration at any of three major directions acts independently. The interaction of the acceleration in multidirectional results in specific the acceleration resultants, and the acceleration interaction change the characteristics of the embankment-subsoil seismic response. The near-fault ground motion was applied to the embankment-subsoil model in a single direction and multidirectional, and results of numerical simulation when the embankment-subsoil model was subjected to a single direction and multidirectional are compared.

0 2 4

X - Direction

-4 -2

-4 -2 Acceleration [m/s 2 ] 0 2 4 0 2 4

Y - Direction

Z - Direction

-4 -2

0

2

4

6

8

10

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14

Time [s]

Fig. 2. The acceleration (m/s 2 ) in X, Y and Z directions [CESMD].

Figure 3 depicts the mesh structure used in the numerical simulation. The mesh size of 4000 (mm) with a hexahedral shape was employed for both the embankment and subsoil. In the mesh construction for exact transfer seismic loading along with the embankment-subsoil model, the mech element in subsoil coincides with the mesh element in the