Workshop on Simulating Earthquake Strong Ground Motions on Large Geotechnical Centrifuges

这一行动是为了支持一个研讨会讨论地震强地面运动的模拟使用土工离心机。土工离心机建模是在实验室中测试土结构（如堤防和水坝）物理模型的一种手段：它通过正确模拟重力引起的应力对土壤强度和刚度特性的影响来做到这一点。这些应力随深度的增加而增加，就像水的压力随深度的增加而增加一样。对一个N尺度的地球模型施加N倍的重力加速度，就会得到正确的重力诱发应力。近十年来，土工离心机建模技术发展迅速。尤其重要的是，在这十年中，新一代的岩土工程师已经接受了对这种方法的欣赏和使用经验的培训。最近一项令人兴奋的发展是使用土工离心机来模拟地震引起的强烈地面运动。这一发展有可能对减轻地震灾害作出巨大贡献。本次研讨会的目的是探讨在加州大学戴维斯分校的三个大型国家岩土离心机中增加地震模拟能力所涉及的问题。位于博尔德的科罗拉多大学和位于纽约特洛伊的伦斯勒理工学院。与会者包括来自学术界、联邦和州机构、工业界以及国外主要岩土离心机装置的代表。讲习班将于1990年2月12日至13日在博尔德的科罗拉多大学举行：讲习班结束后将分发一份总结讨论、结论和建议的报告。

This action is for the support of a workshop to discuss the simulation of earthquake strong ground motions using geotechnical centrifuges. Geotechnical centrifuge modeling is a means of testing physical models of earth structures - such as embankments and dams - in the laboratory: it does this by correctly simulating the effect of gravity-induced stresses on the strength and stiffness properties of soil. These stresses increase with depth, just as water pressure increases with depth below the surface. Subjecting an N-th scale earth model to N times the acceleration due to gravity yields the correct gravity-induced stresses. The state-of-the-art in geotechnical centrifuge modeling has progressed rapidly during the last decade. Especially important is the fact that during this decade, a new generation of geotechnical engineers has been trained with an appreciation of, and experience in using, this method. An exciting development has been the recent use of geotechnical centrifuges to simulate earthquake-induced strong ground motions. This development has the potential to make a dramatic contribution to earthquake hazard mitigation. The objective of this workshop is to explore the issues involved in adding an earthquake simulation capability to the three large national geotechnical centrifuges at the University of California at Davis, the University of Colorado at Boulder and at Rensselaer Polytechnic Institute in Troy, New York. Participants include representatives from academe, federal and state agencies, industry, and from major geotechnical centrifuge installations in foreign countries. The workshop is to be held at the University of Colorado at Boulder on 12-13 February 1990: a report summarizing the discussions, conclusions and recommendations will be distributed following the workshop.