[1]杨海军,季 厅.胶结砂石料应变预测模型参数灵敏度分析[J].江苏水利,2019,(04):33-36+41.
　YANG Haijun,JI Ting.Analysis on the parameter sensitivity of the deformation predicting model for CSG material[J].JIANGSU WATER RESOURCES,2019,(04):33-36+41.
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胶结砂石料应变预测模型参数灵敏度分析()
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《江苏水利》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年04期
页码:
33-36+41
栏目:
水利规划与设计
出版日期:
2019-04-15

文章信息/Info

Title:
Analysis on the parameter sensitivity of the deformation predicting model for CSG material
文章编号:
1007-7839(2019)04-0033-04
作者:
杨海军;  季 厅
南通市水利勘测设计研究院有限公司, 江苏 南通 226000
Author(s):
YANG Haijun;  JI Ting
Nantong Surveying and Design Institute of Water Resource Co., Ltd., Nantong 226000, Jiangsu
关键词:
胶结砂石料;  应变预测模型;  参数灵敏度
Keywords:
CSG material;  prediction model of deformation;  parameters sensitivity
分类号:
TV321; TV649
文献标志码:
A
摘要:
为了探究胶结砂石料应变预测模型参数的灵敏度,首先利用胶凝掺量为80kgm3的胶结砂石料三轴试验数据确定胶结砂石料应变预测模型的参数Ei、n、k m、εm、εd、λ、d,分析了这些参数单独变化对该模型得出的应力变形计算结果的影响。研究表明,参数Ei、n、k、m、εm对胶结砂石料初始模量以及应力-应变曲线的非线性特征等变形特性有一定影响,参数k、m也对强度有较大影响; 参数εd影响着胶结砂石料体积应变曲线中的剪缩剪胀转折点位置,而λ、d影响着胶结砂石料的剪缩剪胀程度。综合比较了应变预测模型的各参数对体变、模量及强度的灵敏度,表明不同参数的灵敏度差异很大; 工程实际应用时,灵敏度较大的参数k、m、λ取值应慎重。
Abstract:
In order to explore the parameter sensitivity of the deformation predicting model for cement-sand-gravel(CSG)material, firstly, the parameters Ei,n,k,m,εm,εd,λ,d of the deformation predicting model for CSG material were determined by using the triaxial test data with the cement proportion of 80kg/m3, and the influence of the individual changes of these parameters on the calculation results of stress and deformation obtained from the model was analyzed.The result showed that the parameters Ei, n, k, m, εm had certain effects on the initial modulus and the nonlinear characteristics of the stress-strain curve, and the parameters k, m also had a great influence on the shear strength.The parameter εd affected the position of the shear dilating turning point in the volumetric strain curve of CSG material, while λ and d affected the degree of shear dilatation and shear dilatancy.The sensitivities of each parameter of strain prediction model to volumetric strain, modulus and strength were comprehensively compared, which indicated that the sensitivities of different parameters were very different.When engineering was applied, the parameters k, m and λ with higher sensitivity should be cautious.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-01-16
作者简介:杨海军(1981—),男,本科,工程师,主要从事水利规划设计工作。
更新日期/Last Update: 2019-04-15