Workshop on Simulating Earthquake Strong Ground Motions on Large Geotechnical Centrifuges

这一行动是为了支持一个讨论使用土工离心机模拟地震强地面运动的研讨会。土工离心机模型是一种在实验室中测试土结构(如堤坝和大坝)的物理模型的方法：它通过正确地模拟重力引起的影响来实现这一点强调土体的强度和刚度特性。这些应力随着深度的增加而增加，就像水压力随着地表以下的深度增加一样。使N比例尺的地球模型受到N倍重力加速度的影响，会产生正确的重力应力。在过去的十年中，土工离心机模型的最新技术得到了迅速的发展。尤其重要的是，在这十年中，新一代岩土工程师接受了对这种方法的欣赏和使用经验的培训。一个令人振奋的发展是最近使用土工离心机来模拟地震引起的强烈地面运动。这一进展有可能为减轻地震灾害做出巨大贡献。这次研讨会的目的是探讨在加州大学戴维斯分校的三台大型国家土工离心机上增加地震模拟能力所涉及的问题，科罗拉多大学博尔德分校和纽约特洛伊的伦斯勒理工学院。与会者包括来自学术界、联邦和州政府机构、工业界以及外国主要土工离心机设备的代表。讲习班定于1990年2月12日至13日在科罗拉多大学博尔德分校举行：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.