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Mechanical role of reinforcement in seismic behavior of steel-strip reinforced earth wall

机译：钢筋在钢带加筋土墙抗震性能中的力学作用

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摘要

In the current design practices of steel-strip reinforced earth walls (SSREWs), the length of the reinforcing material is determined based on the equilibrium between the reinforcement tension and the earth pressure acting on the wall. Here, the resistance of the reinforcing material laid in the active failure zone (AFZ) is not considered. Moreover, the mechanical role of the reinforcing material against the integrity of the SSREW has not been sufficiently verified. Regarding the seismic stability of SSREW, although it is investigated by treating the entire reinforced earth wall as a rigid body, this inspection method is for gravity-retaining walls, and the difference in the seismic behavior between the SSREW and the rigid body is not clear. In this study, therefore, dynamic centrifuge model tests on 6 types of SSREWs were conducted to clarify the following items: (1) the basic earthquake behavior of a SSREW, (2) the mechanical role of the reinforcing material laid in the AFZ and (3) the mechanical role of the reinforcing material against the integrity of the SSREW. The results indicated that the reinforcing material laid in the AFZ can restrain the amount of deformation of the wall during earthquakes. Furthermore, the more stable the AFZ is, the smaller the maximum wall displacement will be. (C) 2019 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
机译：在钢带加固土墙（SSREW）的当前设计实践中，加固材料的长度是根据加固张力和作用在墙体上的土压力之间的平衡来确定的。在此，未考虑置于主动失效区域（AFZ）中的增强材料的电阻。此外，增强材料对SSREW的完整性的机械作用尚未得到充分验证。关于SSREW的抗震稳定性，尽管通过将整个加筋土墙视为刚性体进行了研究，但是这种检查方法是用于重力挡土墙，并且SSREW与刚性体之间的地震行为差异尚不清楚。因此，在本研究中，对6种类型的SSREW进行了动态离心模型测试，以澄清以下各项：（1）SSREW的基本地震行为，（2）AFZ中铺设的增强材料的机械作用和（ 3）增强材料的机械作用不利于SSREW的完整性。结果表明，在AFZ中铺设的增强材料可以抑制地震期间墙体的变形量。此外，AFZ越稳定，最大壁位移将越小。 （C）2019年由Elsevier B.V.代表日本岩土工程学会制作和主持。

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