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

本次研讨会的目的是汇集国际研究人员和实践者处理本地化的地质力学。2002年研讨会的重点将是收集和讨论自1988年第一届研讨会以来所提出的申请。工作坊的范围将包括解析解、数值方法、实验技术和案例历史。除了介绍基础研究成果外，还将着重介绍在岩土、石油、采矿和散装材料工程方面的应用。许多土工结构的破坏以局部变形带的形成和扩展为特征。例如，软岩和超固结粘土的边坡和地下破坏的一个显著特征是出现滑动面或剪切带，其特征与变形集中在狭窄区域和周围材料看起来完整有关。局部化或其他分岔模式的出现往往表现在特定加载条件下试件或系统的失稳中。分岔现象和相关不稳定性的数学公式构成了连续体失效理论的基础。该理论及其应用，以及分析一般不稳定性的方法，对于许多岩土工程问题的充分建模和安全设计至关重要。在欧洲、日本和澳大利亚举行了五次关于地质力学分岔和局部化的国际研讨会：卡尔斯鲁厄，德国：1988年。2. 格但斯克，波兰：1989年。3. 奥索瓦，法国：1993年。4. 日本岐阜：1997年。5. 珀斯，澳大利亚：1999年。第六届研讨会将于2002年6月2日至5日在明尼苏达大学举行。

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.