|
|||||
|
|
Assessment of three interface elements and modification of the interface element in CRISP90 |
|
| Authors: | P C F Ng I C Pyrah and W F Anderson |
| Institution: | a Department of Civil Engineering, David Keir Building, The Queen’s University of Belfast, Stranmillis Road, Belfast BT9 5AG, N. Ireland, U.K. b Department of Civil and Transportation Engineering, Napier University, 10 Colinton Road, Edinburgh EH10 5DT, Scotland, U.K. c Department of Civil and Structural Engineering, The University of Sheffield, Mappin Street, Sheffield S1 3JD, U.K. |
| Abstract: | To model the interaction between a buried pipeline and the surrounding soil either special interface elements or thin conventional elements may be used. In this study the CRISP90 interface element, the DRCRISP interface element and a conventional 8-noded quadrilateral element have been examined and their behaviour compared for a variety of loading conditions. Initial studies reveal that all these elements have limitations and are only suitable for monotonic loading and situations where tensile conditions do not occur across the interface. In the light of these findings the CRISP90 interface element has been modified by introducing a limiting adhesive strength in the normal direction; a flag system has also been introduced to track the various conditions of separation and closure for any gap that is formed. The results of single element and other benchmark tests show that the modified element can satisfactorily model the different modes of deformation relevant to soil–structure interface problems. |
| Keywords: | Soil structure interactions Interfaces (materials) Loads (forces) Tensile properties Finite element method Mathematical models Buried structure Monotonic loading Adhesive strength |
| 本文献已被 ScienceDirect 等数据库收录！ | |