Abstract According to the geophysical data obtained in the near field of the Lushan M7.0 earthquake in 2013, including the deep reflection profile and the result of P wave and S wave tomography, we establish the two-dimensional finite element model. The contact element is used to simulate the discontinuous behavior of the faults, and the numerical simulation results of the strong ground motion are further given. The results show that the ground motion parameters on hanging walls are larger than those on footwalls at the similar rupture distances, which we call the hanging-wall/foot-wall effects of near-fault ground motions. At the same time, the stress drop and cohesive force parameters have obvious positive effects on ground surface horizontal bedrock ground motion. The stress drop plays a significant role in the short period components in 0.05 s-1.00 s, and cohesion has a significant effect on the medium and long period components of 1.00 s-6.00 s.
MENG Qingxiao,LV Jian,JING Pengxu. Simulation of Near Field Strong Ground Motion of Lushan M7.0 Earthquake Based on Two-Dimensional Finite Element Method[J]. jgg, 2019, 39(2): 131-136.
MENG Qingxiao,LV Jian,JING Pengxu. Simulation of Near Field Strong Ground Motion of Lushan M7.0 Earthquake Based on Two-Dimensional Finite Element Method[J]. jgg, 2019, 39(2): 131-136.
