摘要:

AbstractA three‐dimensional finite element program is used to analyse an 80 m high rockfill dam. An analysis is made of the deformed shape of the dam and the internal stresses and strains due to reservoir fillin

ISSN:0363-9061    

DOI:10.1002/nag.1610020102

出版商:John Wiley&Sons, Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractAn investigation was conducted to develop a comprehensive moisture model for predicting non‐isothermal moisture conditions in soils. An extensive literature review indicated that a model based on the Philip and de Vries equations for non‐isothermal moisture movement and heat conduction would give the best results. By using numerical methods, the implicit finite difference approximations to the moisture movement and heat‐transfer equations were programmed for computer solution of water content and temperature in the soil with time.Validation studies indicate that the moisture model can be used to predict accurately moisture conditions in the soil. The model was validated by using hydraulic data from laboratory studies conducted on soil columns compacted with AASHO A‐3 and AASHO A‐4 soil.The application of the moisture model to the study of non‐isothermal moisture movement in the field is demonstrated. The influence of parameters such as water table depth, precipitation, and soil hydraulic properties on soil moisture content are shown by use of the moisture model. The model is shown to be applicable to a wide range of boundary conditions and that it predicts the moisture‐temperature regime with time in soils utilizing climat

ISSN:0363-9061    

DOI:10.1002/nag.1610020103

出版商:John Wiley&Sons, Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractIncremental theory of plasticity has been used to derive associated and non‐associated stress–strain relations for analysing the undrained stress‐strain response of isotropic normally and lightly overconsolidated clays. A series of comparisons between the theoretical stress‐strain‐pore pressure response and laboratory test results for 3 in. × 6 in. samples of very high degree of repeatability and reproduceability have been described. From these comparisons it can be seen that both the associated and, non‐associated Cam clay models appear to give consistently the best correlations between the theoretical results and the experimental

ISSN:0363-9061    

DOI:10.1002/nag.1610020104

出版商:John Wiley&Sons, Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractNumerical codes which use a one‐point quadrature integration rule to calculate stiffness matrices for the 2‐D quadrilateral element and the 3‐D hexahedral element, produce matrices which are singular with respect to a number of displacement patterns, other than the rigid body patterns. In this paper an economical method is derived to remove this singularity and which also produces accurate flexural response. For rectilinear element geometry the method is equivalent to the incompatible model element of Wilsonet al.7For non‐rectilinear element geometry a slight modification of the scheme is required in order to assure that it passes the patch test. The method of this paper can also be used in finite difference codes which experience similar diffi

ISSN:0363-9061    

DOI:10.1002/nag.1610020105

出版商:John Wiley&Sons, Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractThe paper deals with the determination of the flow properties of expansive and unsaturated clays under different conditions of stress. By choosing the moisture content as the dependent variable, the well known non‐linear diffusin equation is derived. Numerical solutions using a finite element program are presented, assuming a linear relationship between the moisture diffusivity and the concentration (the relative moisture content). These solutions are interpreted and a procedure is proposed to derive the flow properties of the clay from the sorption curves. Results of tests are presented and used to illustrate the procedure. It is found that the lower the stress applied, the smaller the initial moisture diffusivity and the stronger the dependence of the moisture diffusivity upon the concentratio

ISSN:0363-9061    

DOI:10.1002/nag.1610020106

出版商:John Wiley&Sons, Ltd    

年代:1978

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610020107

出版商:John Wiley&Sons, Ltd    

年代:1978

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610020109

出版商:John Wiley&Sons, Ltd    

年代:1978

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610020101

出版商:John Wiley&Sons, Ltd    

年代:1978

数据来源: WILEY