Practical method to predict settlement of subgrade induced by long-term traffic loads

被引：0

作者：

Zhang, Xing-Xing ^{[1
,2
]}

Zhang, Jian-Min ^{[1
]}

Wen, Yan-Feng ^{[2
]}

机构：

[1] State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing

[2] State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing

来源：

Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2015年 / 37卷 / 11期

关键词：

Finite element method; Settlement; Subgrade; Traffic load; Visco-elastic model;

D O I：

10.11779/CJGE201511018

中图分类号：

学科分类号：

摘要：

There are still no effective methods to predict the settlement of subgrades caused by long-term irregular traffic loads. The mechanism of the plastic deformation caused by slight long-term dynamic loads has not been understand. And the existing plastic theory can hardly involve this type of deformation. In order to solve this problem, a practical method is proposed based on an equivalent vicso-elasto-plastic model. The model consists of two components. The first is a visco-elastic model, in which dynamic modulus is determined by Ramberg-Osgood equations and the damping ratio is determined by the equation proposed by Hardin and Drnevich. The other is empirical equation determines the residual strain, which is based on the stress process in subgrade foundation caused by traffic loads and the characteristics of residual strain tested by dynamic triaxial tests. After the stress process is obtained using the finite element analysis, the residual strain of every element can be determined by the empirical equation, then the settlement of the subgrade can be predicted. A simple example is presented to illustrate this procedure. © 2015, Chinese Society of Civil Engineering. All right reserved.

引用

页码：2067 / 2072

页数：5

共 15 条

[1]

Taniguchi E., Whitman R.V., Marr W.A., Prediction of earthquake-induced deformation of earth dams, Soils and Foundations, 23, 4, pp. 126-132, (1983)

[2]

Chen S.-S., Shen Z.-J., Analysis of seismic permanent deformation of rockfill dam, Journal of Nanjing Hydraulic Research Institute, 3, pp. 277-286, (1990)

[3]

Shen Z.-J., An equivalent visco-elastic mechanism for liquefaction-induced deformation in sand, China Civil Engineering Society. Selected Papers of the Fourth Symposium on Soil Mechanics and Foundation Engineering, pp. 199-207, (1986)

[4]

Wang Z.-L., Wang Y.-Q., Han Q.-Y., Visco-elastoplastic soil model for irregular shear cyclic dynamic loadings, Chinese Journal of Geotechnical Engineering, 2, 3, pp. 10-19, (1980)

[5]

Ramberg W., Osgood W.R., Description of stress-strain curves by three parameters, (1943)

[6]

Hardin B.O., Drnevich V.P., Shear modulus and damping in soils, Journal of the Soil Mechanics and Foundations Division, 98, 7, pp. 69-667

[7]

Wang J., Cai Y.-Q., Study on accumulative plastic strain model of soft clay under cyclic loading, Chinese Journal of Rock Mechanics and Engineering, 27, 2, pp. 331-338, (2008)

[8]

Wichtmann T., Explicit Accumulation Model for Non-cohesive Soils Under Cyclic Loading, (2005)

[9]

Zhang H.-B., Long term cumulative deformation of cohesionless material induced by repeated loading, (2006)

[10]

Zhang H.-B., Huang M.-S., Song X.-G., Equivalent viscoplastic model for cumulative deformation of sandy silt under long-term cyclic loading, Journal of Hydraulic Engineering, 40, 6, pp. 651-658, (2009)

← 1 2 →