Abstract Ordinary stone columns and Geosynthetic Encased Stone columns are used in remediation of soft soils with low bearing capacities. Primary objective of granular columns is to provide structural support to the overlying foundation layers. Given that the granular columns implemented in soft soil conditions support a large portion of the surcharge pressure, developing an understanding of settlement response and pressure bearing characteristics of granular columns under seismic loading conditions is of paramount importance. This study aims to present experimental findings of granular column load bearing response under simulated seismic loads and the effects of lateral boundary conditions on column behavior. In order to mimic the seismic behavior of columns supporting a sustained surcharge load, two different large-scale experimental assemblies are used in 1-g shaking table tests. The assemblies used were a laminar box and a rigid box which were intended as physical analogies for free-field and rigid boundary conditions. The reinforcement strains, pressure concentration on column heads, and settlement of the unit cells enhanced with granular columns with varying reinforcement stiffnesses are studied. The relationship between unit cell settlement and two important earthquake intensity measures namely, Arias Intensity and Shaking Intensity Rate, are also investigated.

中文翻译：

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地震荷载作用下土工合成材料柱的承载和沉降特性

摘要 普通石柱和土工合成石柱用于低承载力软土的修复。颗粒柱的主要目的是为上覆的基础层提供结构支撑。鉴于在软土条件下实施的颗粒柱支撑大部分超载压力，了解颗粒柱在地震荷载条件下的沉降响应和承压特性至关重要。本研究旨在展示模拟地震荷载下颗粒柱承载响应的实验结果以及横向边界条件对柱行为的影响。为了模拟支撑持续超载荷载的柱子的地震行为，两种不同的大型实验组件用于 1-g 振动台测试。使用的组件是层流盒和刚性盒，它们旨在作为自由场和刚性边界条件的物理类比。研究了钢筋应变、柱头压力集中以及不同钢筋刚度的粒状柱增强的单元格的沉降。还研究了单元格沉降与两个重要的地震烈度度量，即阿里亚斯烈度和震动烈度率之间的关系。研究了不同钢筋刚度的粒状柱增强的晶胞的沉降。还研究了单元格沉降与两个重要的地震烈度度量，即阿里亚斯烈度和震动烈度率之间的关系。研究了不同钢筋刚度的粒状柱增强的晶胞的沉降。还研究了单元格沉降与两个重要的地震烈度度量，即阿里亚斯烈度和震动烈度率之间的关系。