ATTEMPTS AT CENTRIFUGAL AND NUMERICAL SIMULATIONS OF A LARGE- SCALE IN SITU LOADING TEST ON A GRANULAR MATERIAL
ATTEMPTS AT CENTRIFUGAL AND NUMERICAL SIMULATIONS OF A LARGE- SCALE IN SITU LOADING TEST ON A GRANULAR MATERIAL
复制标题
颗粒材料大规模原位加载试验的离心和数值模拟尝试
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
T. Hagiwara
中科院分区：
文献类型：
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作者：
O. Kusakabe;Y. Maeda;Masatoshi Ohuchi;T. Hagiwara
本文介绍了在气压沉箱中对火山喷发产生的颗粒物质--火山渣进行的大型现场载荷试验。还提供了从加载测试现场获取的未扰动火山渣样本的测试结果。对于加载测试，尝试了两种类型的模拟：使用未受干扰的样品的离心模拟和使用元件测试数据的CRISP包的FEM（有限元法）模拟。结果发现，离心模拟使用原状样品预测的屈服载荷，接近原型的弹性变形，但没有开发出清晰的滑移线和屈服载荷下的沉降比原型大得多。据推测，观察结果可能部分是由于颗粒尺寸效应。在有限元分析中遇到的土壤参数的选择困难和不确定性的K（次O）值的确定非常高的超固结比被公认。(A)有关覆盖摘要，请参见IRRD 859983。
This paper describes a large-scale in situ loading test on a scoria, a granular material produced by volcanic eruptions, conducted in a pneumatic caisson. Presented also are test results on undisturbed scoria samples procured from the loading test site. For the loading test, two types of simulation were attempted: centrifugal simulation using undisturbed samples and FEM (Finite Element Method) simulation of the CRISP package using the element test data. It was found that centrifugal simulation using undisturbed samples predicted the yield load, and elastic deformations close to the prototypes, but clear slip lines were not developed and settlements at yield load were much larger than those in prototype. It was inferred that the observations may be partly due to particle size effect. Difficulty in the selection of soil parameters in the FEM analysis was encountered and uncertainty in the determination of K(sub O) values for very high overconsolidation ratios was recognized. (A) For the covering abstract see IRRD 859983.