摘要:

AbstractA method for the analysis of the consolidation of a horizontally layered soil under plane conditions is developed. The method depends upon the transformation of the governing equations by a Fourier trasform. This transformation has the effect of reducing the partial differential equations of consolidation to ordinary differential equations. The ordinary differential equations are then solved using a finite layer or finite difference approach. Once the solution in the transformed plane has been found, the actual solution is synthesized by Fourier inversion. The method leads to a considerable reduction in the amount of core storage necessary for solution and enables the solution of quite significant problems to be obtained on a mini‐compute

ISSN:0363-9061    

DOI:10.1002/nag.1610060204

出版商:John Wiley&Sons, Ltd    

年代:1982

数据来源: WILEY

摘要:

AbstractThe theory developed in Part I of this paper is extended to apply to the consolidation of horizontally layered soils under both axially symmetric and general surface loading. The method again leads to a considerable reduction in the amount of core storage necessary for computer solution and can be implimented on a mini‐compute

ISSN:0363-9061    

DOI:10.1002/nag.1610060205

出版商:John Wiley&Sons, Ltd    

年代:1982

数据来源: WILEY

摘要:

AbstractDuring the last ten years the Calculus of variations technique has been applied to solve the problem of stability of slopes. All published methods are essentially based on the attainment of a functional and the search for its absolute minimum or maximum by vanishing its first variation.Obviously this statement of the problem is valid only if such a minimum or maximum exists and can be obtained by making the first variation of the functional equal to zero. So, these implicit hypotheses must be checked.This work analyses from this point of view the validity of the methods proposed by ‘Baker and Garber’, ‘Chen’ and ‘Castillo and Revilla’, and demonstrates that the first two methods are incorrectly stated while the third one is correct at least in the case of a fricti

ISSN:0363-9061    

DOI:10.1002/nag.1610060206

出版商:John Wiley&Sons, Ltd    

年代:1982

数据来源: WILEY

摘要:

AbstractThe bearing capacity of deep foundations has been analysed using finite elements in conjunction with elasto‐viscoplasticity. The influence of elastic parameters, mesh size and strain conditions on computed collapse loads was observed. Axisymmetric problems in particular were of interst, because it was found that good numerical solutions could be obtained through to collapse provided reduced integration was use

ISSN:0363-9061    

DOI:10.1002/nag.1610060207

出版商:John Wiley&Sons, Ltd    

年代:1982

数据来源: WILEY

摘要:

AbstractClosed‐form solution to the problem of free vibrations of vertically inhomogeneous earth dams, modelled as truncated‐wedge‐shaped shear beams, has been obtained by implementing an inverse procedure in which the determination of the function descrbing the inhomogeneity constitutes part of the problem. The resulting cube‐root variation of the shear‐wave velocity with distance from the crest compares very favourably with measurements in two Japanese dams. The results of the method are presented in theform of natural periods, modal shapes and average seismic coefficients for a number of truncation ratios. Compared with an ‘equivalent’ homogeneous dam, the inhomogeneous experiences sharper amplification of modal displacements and greater averge seismic, coefficients near the crest and has natural periods which are closer to each other. This behaviour is in better agreement with the observed response of a 37m‐high dam during five ear

ISSN:0363-9061    

DOI:10.1002/nag.1610060208

出版商:John Wiley&Sons, Ltd    

年代:1982

数据来源: WILEY

摘要:

AbstractAn incremental formulation of constitutive laws is first presented and the fundamental notion of incremental non‐linearity, necessary for the description of cyclic behaviour of soils, is emphasized.The incremental constitutive law for soils and its principal assumptions, which make it more general than the classical elastic–plastic models are detailed.The constitutive parameters of Hostun sand and Grundite clay are then given, as well as a comparison of theoretical results with experimental axisymmetrical and true triaxial measurements (Hostun sand tests at Grenoble and Grundite clay tests at Berkeley). Different cyclic behaviour simulations are presented, as well as an example of cyclic liquefaction of Monterey loose sand. Finally, a simple shear test is simula

ISSN:0363-9061    

DOI:10.1002/nag.1610060209

出版商:John Wiley&Sons, Ltd    

年代:1982

数据来源: WILEY

摘要:

AbstractA continuum finite element formulation that models the failure of a rock mass, the collapse of this rubble into a void space and the associated bulking of the rubble is presented. This formulation is incorporated into a finite element computer program that treats the large deformation non‐linear motion of axisymmetric and two‐dimensional continua. A dynamic relaxation procedure is used for the solution algorithm. Example calculations are given that demonstrate the formulat

ISSN:0363-9061    

DOI:10.1002/nag.1610060210

出版商:John Wiley&Sons, Ltd    

年代:1982

数据来源: WILEY

摘要:

AbstractThe effectiveness of the heat balance integral approach in determining the extent of frost penetration of the ground is illustrated.

ISSN:0363-9061    

DOI:10.1002/nag.1610060211

出版商:John Wiley&Sons, Ltd    

年代:1982

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610060212

出版商:John Wiley&Sons, Ltd    

年代:1982

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610060203

出版商:John Wiley&Sons, Ltd    

年代:1982

数据来源: WILEY