Shaking table tests on geosynthetic-reinforced slope- Effects of foundation strength

Abstract

In present study geosynthetic-reinforced walls were used to having a shaking table test A laminar box was used to reduce boundary effect About the test medium used in this study is a medium-dense river sand Through various peak acceleration frequency length of reinforcement and angle difference in front of the wall were used in the model test to investigate their on the dynamic behavior of the geosynthetic-reinforced walls Results of a comparative study between the test results reported in the literature and those in the present study reveal: 1 The seismic displacement are significantly affected by the frequency of base motion i e seismic displacement increase with decreasing frequency of base motions for identical values of horizontal peak ground acceleration(HPGA) 2 The normalized displacement curves obtained here fall to the right of analytical and empirical curves reported in the literature suggesting that a permanent displacement of the slope prior to the yielding of the slope occurs This phenomenon has not been considered in previous studies 3 Transitions from an amplification state to a de-amplification state occur at certain levels of input ground accelerations depending on the input wave motion 4 Through multiple methods to represent the amplification factor such as Max of peak acceleration Rms method and Arias intensity These methods shows the similar trend about amplification and de-amplification but each of them have the different transition point 5 Through change the slope angel in front of the wall the maximum lateral displacement position change from middle of the wall to top of the wall

Date of Award	2019
Original language	English
Supervisor	Ching-Chuan Huang (Supervisor)