Seismic Response Law And Optimal Design Method Of Geosynthetic Reinforced Embankments

Road structures like bridges,embankments,tunnels and so on are usually used to facilitate transportation.These structures often face different degrees of damage during earthquakes.The performance of these structures needs to be maintained to a certain level after an earthquake,this will help road communication system to easily get back to normal after an earthquake.To achieve this,we need to reinforce these structures against earthquake during construction.Earthquakes are usually of different magnitudes and intensities.This means the degree of damage caused by an earthquake on a road structure will depend on the magnitude and intensity of the earthquake.So,to better design a road structure against earthquake,we need to carry out some laboratory tests to understand the seismic behavior of such a structure.In this paper,we looked at how we can use geosynthetic reinforcements to improve the performance of road embankments against earthquakes.In order to better comprehend the seismic behavior of geosynthetic reinforcements and the importance of using geosynthetic reinforcements,large-scale shaking table model tests were performed on the geosynthetic reinforced embankment and five simulations were performed.The first of the five simulations was the simulation of the seismic response of an unreinforced embankment.The second simulation was the simulation of the seismic response of an embankment reinforced with 3 layers of geogrids.The third simulation was the simulation of the seismic response of an embankment reinforced with 5 layers of geogrids.The fourth simulation was the simulation of the seismic response of an embankment reinforced with 6 layers of geogrids.The last simulation was the simulation of the seismic response of an embankment reinforced with 11 layers of geogrids.For the finite element analysis,the simulation software Abaqus 2020 was used to simulate and analyze the seismic behavior of a road embankment without and with geosynthetic reinforcements.The engineering properties of the embankment materials used in numerical analysis were obtained from tests performed by various researchers.Mohr coulomb model was used for embankment material modeling and a real accelerogram of an earthquake of magnitude 6.5 on the Richter scale recorded for the Koyna dam earthquake on December 11,1967 was used for the finite element method analysis.The simulation results were then analyzed by comparing the simulation results to the largescale shaking table experimental results.The data provided by Wenchuan earthquake damage investigation was also useful in analyzing embankment damages.The simulation results show that the damage level of the reinforced embankment was very insignificant compared to that of the unreinforced embankment.And that when more layers of reinforcements were used,the seismic performance of the embankment was increased...