| 邹德高.粗粒料广义塑性模型对不同应力路径适应性研究[J].,2013,53(5):702-709 |
| 粗粒料广义塑性模型对不同应力路径适应性研究 |
| Study of adaptability of generalized plastic model of coarse grained soil under various stress paths |
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| DOI：10.7511/dllgxb201305014 |
| 中文关键词: 粗粒料 应力路径 三轴试验 广义塑性模型 模型验证 |
| 英文关键词: coarse grained soil stress paths triaxial test generalized plastic model model validation |
| 基金项目:]地震行业科研专项经费资助项目(201208013)；国家自然科学基金资助项目(51138001；51279025；51078061)；新世纪优秀人才支持计划资助项目(NCET-12- 0083). |
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| 中文摘要: |
| 结合两种不同岩性的粗粒料在等σ1、等σ3、等p以及等应力比应力路径下的大型三轴试验和侧限压缩试验成果,研究了粗粒料广义塑性模型对不同应力路径的适应性．结果表明:广义塑性模型很好地反映了粗粒料变形的应力路径相关性．同时根据Roadford坝坝料的三轴试验结果得到的模型参数,对大坝进行了有限元数值模拟,计算得到的大坝填筑后的变形与实际监测结果吻合较好．表明广义塑性模型也能较好地反映土石坝施工期应力路径对坝体变形的影响． |
| 英文摘要: |
| Based on a series of large-scale triaxial tests and confined compression tests, the stress paths of coarse grained soil with two kinds of rock properties under constant σ1, constant σ3, constant p and constant stress ratio are simulated by the generalized plastic model to study the adaptability of model for stress paths of coarse grained soil. Through the comparison between numerical simulations and test results, it is testified that the deformation of coarse grained soil under complex stress paths can be well reflected by the generalized plastic model. At the same time, the Roadford dam is simulated by a finite element procedure, and the parameters of the generalized plastic model are calibrated by triaxial experiments of rockfill materials of Roadford dam. The numerical results agree well with in-situ monitoring records of dam deformation. It is concluded that the effects of stress paths on dam deformation during construction can be well reflected by the generalized plastic model. |
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