Analysis of the seismic response for high slope with special fractured rock

• 1、Institute of Water Resources and Hydro-electric Engineering, Xi’an University of Technology, Xi’an 710048, China

Abstract：The seismic response of high slope with special fractured rock was analyzed in this pape. Forced state and movement characteristics of discontinuity fracture surface were analyzed in detail. The constraint condition of discontinuity fracture surface was introduced by the penalty functions and Lagrange multipliers method. Based on generalized variational principle, the discontinuity theory framework of fractured rock mass was established, which was applied in the numerical analysis of a special discontinuous fracture surface of high rock slope with inverted wedge. The results showed that the method was reliable. The seismic response analysis of high rock slope did not linearly increase. The amplifier of peak acceleration at different elevation was staggered. The input seismic waves were affected by surface amplification of the slopes. The peak acceleration in the slope was greater than the mountain at the same elevation. The discontinuous fracture surface of rock mass has an important implication on seismic response of slopes, particularly more significant influence on the surrounding rock of discontinuous fracture surface. The study provides an important reference for the awareness of the dynamic characteristics of high slope engineering and later management.

Keywords： high slope fractured rock seismic dynamic response numerical analysis