摘要:

AbstractProgressive failure in long natural clay slopes with an underlying weak shear zone is studied. The clay slope is assumed to be elastic–perfectly plastic, whereas the shear zone may have an elastic–plastic strain softening behaviour. The failure will occur due to the development of large shear deformations in the weak zone. The general behaviour, including the possibility of progressive failure, can be studied by the use of a one‐dimensional finite element model. Other interesting matters which can be studied are critical load, critical disturbance and critical length of the slope. Numerical examples show the overall behaviour due to different residual shear strengths of the weak layer, end disturbance or change of pore pressure in the weak layer. Although simple, the proposed finite element model provides a practically applicable tool for the prediction of whether progressive failure will occur and in which manner the local failure will prop

ISSN:0363-9061    

DOI:10.1002/nag.1610140902

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY

摘要:

AbstractVertical and horizontal deformations of surface footings have been studied for an inhomogeneous elastic half‐space in which the shear modulus increases with an arbitrary power of depth,n, and Poisson's ratio is constant. A general solution for displacements has been obtained first for point loads applied in vertical and horizontal directions. These are then used in obtaining closed‐form solutions for displacements of uniformly loaded circular and rectangular footings. Finally, a numerical method is described that can be used to analyse a rigid footing of an arbitrary shape, and results for rigid rectangular footings are gi

ISSN:0363-9061    

DOI:10.1002/nag.1610140903

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY

摘要:

AbstractLaplace transform solutions are derived for an evolving permafrost region in saturated ground when the freezing interface moves with constant speed. The solution is inverse in the sense that the melting temperature at the interface and the groud surface temperature are prescribed functions of time. The solution procedure incorporates an initial temperature distribution in a domain extended above the ground surface. This allows, by asymptotic analysis, the construction of initially continuous melting and surface temperatures with bounded first and second derivatives. Solutions for two classes of initial conditions are determined by numerical inversion of the transforms. These solutions are used to test the corresponding solutions obtained by a direct finite difference algorithm developed earlier.1Good agreements for both interface path and temperature profiles are obtained in both classes.

ISSN:0363-9061    

DOI:10.1002/nag.1610140904

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY

摘要:

AbstractThe dynamic response of an inhomogeneous, linear‐elastic half‐space to a time‐harmonic vertical line load on its surface is studied. The mass density and the Poisson's ratio are assumed to be constant and the shear modulus to increase continuously with depth according to a function which is bounded at infinity. This model can describe a wide range of uniformly deposited soil strata. Analytical solutions for the displacement field at the surface are obtained using the classical contour integration method by means of the residue theorem. The dependence of the displacement field on distance from the source, frequency and shear modulus variation is examined as well as the relative contribution of the higher surface wave vibration modes to the total displac

ISSN:0363-9061    

DOI:10.1002/nag.1610140905

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610140906

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610140901

出版商:John Wiley&Sons, Ltd    

年代:1990

数据来源: WILEY