ISSN:0363-9061    

DOI:10.1002/nag.1610010102

出版商:John Wiley&Sons, Ltd    

年代:1977

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610010103

出版商:John Wiley&Sons, Ltd    

年代:1977

数据来源: WILEY

摘要:

AbstractPresented in this paper is a formulation and a numerical solution method for problems which involve finite deformations of an elasto‐plastic material. The governing equations are cast in rate form and the constitutive laws are formulated in a frame indifferent manner. Particular reference is made to the finite deformation of soil. Plastic failure is described by a general yield condition and plastic deformation by an arbitrary flow rule. Several examples are treated numericall

ISSN:0363-9061    

DOI:10.1002/nag.1610010104

出版商:John Wiley&Sons, Ltd    

年代:1977

数据来源: WILEY

摘要:

AbstractThe stress field and flow characteristics are studied for a cavity with the shape of a prolate spheroid in dome salt with emphasis given to the excavation phase. A semi‐empirical creep law is derived from thermodynamic principles and experimental results. In this paper, an elementary non‐linear form is used in the kinetic relation. A finite element solution procedure is discussed which incorporates the creep law, excavation sequence, and arbitrary non‐homogeneous initial stress

ISSN:0363-9061    

DOI:10.1002/nag.1610010105

出版商:John Wiley&Sons, Ltd    

年代:1977

数据来源: WILEY

摘要:

AbstractSome recently developed implicit time discretizations are discussed whose main application is to solving ordinary differential equations arising from finite element approximations to partial differential equations. Their theoretical properties, computer implementation and numerical behaviour, as observed in tests on simple examples, are compared with well‐known discretizations such as the Crank‐Nicholson met

ISSN:0363-9061    

DOI:10.1002/nag.1610010106

出版商:John Wiley&Sons, Ltd    

年代:1977

数据来源: WILEY

摘要:

AbstractA series of finite element analyses were performed to study the behaviour of a system of two parallel and adjacent tunnels. Various sequences of excavation of the two tunnels and installation of tunnel liners have been simulated in the analyses. Influence of various parameters on the behaviour of the two parallel tunnels has been investigated. The important parameters considered in this study are: the width of the pillar separating the two tunnels; the tunnel depth; support condition; sequence of excavation; and, to some extent, the influence of plastic yielding in the medium surrounding the two tunnels.

ISSN:0363-9061    

DOI:10.1002/nag.1610010107

出版商:John Wiley&Sons, Ltd    

年代:1977

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610010101

出版商:John Wiley&Sons, Ltd    

年代:1977

数据来源: WILEY