Evaluation of extent of damage in geogrid reinforced soil walls subjected to earthquakes

在这项研究中，在GRSW的损伤程度评估进行了讨论。由墙体的水平位移估算加固区回填材料的剪应变。然后，根据简单塑性理论确定滑移线的出现。以往的研究表明，加筋土挡墙的抗震稳定性取决于回填土中滑移线产生后，土工格栅与回填材料之间的抗拔力，因此，对加筋区存在滑移线的加筋土挡墙的抗震稳定性进行了拉拔试验评价。最后，通过离心振动台试验验证了该方法的有效性。

In this study, evaluation of degree of damage in GRSW is discussed. Shear strain of backfill material in the reinforced area is evaluated from the horizontal displacement of the wall. Then, occurrence of the slip line is decided based on the simple plastic theory. Since the past studies show that seismic stability of the GRSW depends upon the pullout resistance between geogrid and backfill material after the generation of slip line in the backfill, seismic stability of the GRSW having slip line in the reinforced area is evaluated from the results of the pullout test. Finally, the validity of the proposed method was verified with results of some centrifuge shaking table tests.