Interpretation of creep properties of geogrid under simulated seismic event condition by SIM(Stepped Isothermal Method) test

초록

Usually, the lifetimes of geogrid are assessed as the long-term creep behavior which causes shape deformation and collapse of the slopes and embankments. During an earthquake, the structure is subjected to additional loads, which may influence the creep characteristics of the reinforcement. The SIM (stepped isothermal method) test provides an opportunity to study the effect of simulated seismic events or the influence of other additional loads, occurring at different intervals of the life of the structure, on the long-term strength of geosynthetic reinforcement. In this paper, two simulated seismic event related to SIM tests were performed, one with a simulated seismic event at 23℃ step, the other tests carried out after 79℃ step. Creep strain decreased after seismic event cause of recovery force, then strain increased again. After same conditions of seismic event in different times were applied, strain finally overlapped. Copyright © 2018 by the International Society of Offshore and Polar Engineers (ISOPE)

키워드