Workshop on Bifurcations and Instabilities in Geomechanics, June 2-5, 2002, St. John's University, Collegeville, Minnesota

这次研讨会的目的是让从事地质力学本土化工作的国际研究人员和从业人员汇聚一堂。2002年讲习班的重点将是收集和辩论自1988年第一次讲习班以来提出的申请。研讨会的范围将包括解析解、数值方法、实验技术和案例。除了介绍基础研究成果外，还将强调在岩土、石油、采矿和散装材料工程中的应用。许多岩土结构的失效特征是局部变形区的形成和传播。例如，在软岩和超固结粘土中，斜坡和地下破坏的一个显著特征是出现滑动面或剪切带，其特征是变形集中在狭窄的区域，周围的材料看起来完好无损。局部化或其他分叉模式的出现通常表现为在特定加载条件下的试件或系统失稳。分叉现象和相关不稳定性的数学表述构成了破坏的连续统理论的基础。这一理论及其应用，以及分析一般不稳定性的方法，对于许多岩土工程问题的适当建模和安全设计是至关重要的。在欧洲、日本和澳大利亚举办了五次关于地质力学中的分叉和本地化的国际研讨会：1.卡尔斯鲁厄，德国：1988。2.波兰格但斯克：1989年。3.奥索伊斯，法国：1993年。4.岐阜市，日本：1997年。5.澳大利亚珀斯：1999年。明尼苏达大学被选为将于2002年6月2日至5日举行的第六次讲习班的地点。

The objective of this workshop is to bring together international researchers and practitioners dealing with localization in geomechanics. The focus of the 2002 workshop will be to collect and debate the applications that have taken place since the first workshop in 1988. The scope of the workshop will include analytical solutions, numerical methods, experimental techniques, and case histories. Besides the presentation of fundamental research findings, applications in geotechnical, petroleum, mining, and bulk materials engineering will be emphasized.Failure of many geotechnical structures is characterized by the formation and propagation of zones of localized deformation. For example, a noticeable feature of slope and underground failures in soft rock and overconsolidated clay is the appearance of slip surfaces or shear bands, the characteristics of which are associated with deformation being concentrated in narrow zones and the surrounding material appearing intact. The appearance of localization or other bifurcation modes often manifests itself in specimen or system instability under specific loading conditions. The mathematical formulation of bifurcation phenomena and related instabilities constitutes the basis of a continuum theory of failure. This theory and its applications, as well as the methodology of analyzing instabilities in general, are crucial in adequate modeling and safe design of numerous geotechnical engineering problems.Five international workshops on bifurcation and localization in geomechanics have been held in Europe, Japan, and Australia: 1. Karlsruhe, Germany: 1988. 2. Gdansk, Poland: 1989. 3. Aussois, France: 1993. 4. Gifu, Japan: 1997. 5. Perth, Australia: 1999. The University of Minnesota was selected as the site for the 6th Workshop to be held on June 2-5, 2002.