摘要:

AbstractA one‐dimensional wave propagation method for earthquake response analysis of horizontally‐layered sites of infinite lateral extent is adapted to account for the finite cross‐sectional dimensions of an embankment dam overlying a foundation deposit which may be considered infinite in its lateral extent. The procedure is used to study the response of an existing embankment dam for an actual earthquake record. A two‐dimensional dynamic finite element analysis is also performed for this case. The records of ground acceleration at an outcropping base rock and at the crest of the dam are available for the site. The comparisons of computed and observed responses support the modified use of the simple numerical pr

ISSN:0363-9061    

DOI:10.1002/nag.1610090202

出版商:John Wiley&Sons, Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractUse of “singularity” elements to model pore pressures in the vicinity of free‐draining loaded surfaces, immediately after application of loads at these surfaces is discussed. One‐dimensional consolidation is considered. Comparison of numerical results with the exact solution shows that use of specially designed elements approaching “singularity” may succeed in reducing the error in por

ISSN:0363-9061    

DOI:10.1002/nag.1610090203

出版商:John Wiley&Sons, Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractThe analysis of elasto‐plastic boundary value problems using the finite element method involves many discretizations. These lead to the problem of yield surface drift in which the stress state predicted at the end of an elasto‐plastic increment of loading does not lie on the current yield surface. As such discrepancies are comulative it is important to ensure that the stresses are corrected back to the yield surface during each increment of loading.In this paper five methods of accounting for this drift are examined. These involve correcting the stresses by projecting back along the plastic flow, the total strain increment and the accumulated effective stress direction. In addition a ‘correct’, method which accounts for the changes in elastic strains which accompany any stress correction is considered. This method is theoretically more sound than the other approximate approaches. All five methods have been used in finite element analyses of the stress changes that occur adjacent to a single pile installed in a uniform deposit of soil on pile loading. The soil was assumed to be normally consolidated and was modelled using a form of modified Cam Clay. Comparison of these results with an analysis, in which yield surface drift was negligible indicated that only the ‘correct’ method and the method involving projecting back along the plastic flow direction give accurate predictions. Substantiai errors occur if the other methods of correcting for yield surface drift are employed. It is recommended that the ‘correct’ method be adopted for finite eleme

ISSN:0363-9061    

DOI:10.1002/nag.1610090204

出版商:John Wiley&Sons, Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractA coupling scheme for boundary and finite elements using a joint element is proposed. The scheme is based on the finite element discretization (i.e. the equivalent FE procedure). Footing problems founded on multiple layers are solved. Furthermore, the scheme is extended to a non‐linear analysi

ISSN:0363-9061    

DOI:10.1002/nag.1610090205

出版商:John Wiley&Sons, Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractWhen a heat source such as a canister of radioactive waste is buried in a saturated soil the temperature changes that occur will cause the pore water to expand a greater amount than the voids of the soil. The temperature change will thus usually be accompanied by an increase in pore pressure. If the soil is sufficiently permeable these pore pressures will dissipate. This paper develops an analytic solution for the fundamental problem of a point heat source buried deep in a saturated soil.

ISSN:0363-9061    

DOI:10.1002/nag.1610090206

出版商:John Wiley&Sons, Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractA technique for locating the nodal points of standard isoparametric quadrilateral elements properly around a discharge velocity singularity point in a soil seepage flow problem is presented. It is based on the analytical solution of the problem in an infinite medium and gives simple formulae for calculating the nodal coordinates. The effectiveness of the method is justified with examples.

ISSN:0363-9061    

DOI:10.1002/nag.1610090207

出版商:John Wiley&Sons, Ltd    

年代:1985

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610090208

出版商:John Wiley&Sons, Ltd    

年代:1985

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610090209

出版商:John Wiley&Sons, Ltd    

年代:1985

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610090201

出版商:John Wiley&Sons, Ltd    

年代:1985

数据来源: WILEY