Experimental Study of Earthquake-Induced Soil Liquefaction and Lateral Spreading and its Effects on Pile-Supported Port Facilities

* 9612233 Dobry倾斜地面或滨水区附近土壤的横向扩展是一种普遍且昂贵的液化引起的地震引起的地面破坏类型。 它对建筑物、桥梁、桥梁、被掩埋的生命线，特别是港口设施造成损害。 特别重要的是对桩基础造成的破坏，如1989年洛马普列塔和1995年科比（日本）和曼萨尼约（墨西哥）地震等一些地震的历史案例所示。 由于横向扩散造成的累积损失，包括对桩和港口设施的影响，达到数十亿美元。 虽然在预测、量化和减轻这些影响方面取得了进展，但迫切需要改进评估程序。 该项目是与墨西哥国立自治大学（UNAM）合作研究计划的一部分。 它侧重于（1）在伦斯勒理工学院（RPI）进行的地震引起的横向扩展及其对单桩和群桩影响的土工离心模型试验（2）在墨西哥国立自治大学对曼萨尼约港土壤进行的实验室静态和循环荷载研究（3）横向扩展及其对桩影响的数值分析，以及（4）相关解释和建议，特别强调港口设施。 它包括在1995年10月地震期间在RPI对Puerto Manzanillo案例历史进行离心建模，并根据离心机结果和UNAM的其他信息对该案例历史进行进一步评估。 两个小组的工作密切协调。 在康奈尔大学进行了横向扩展的单桩和群桩离心模型试验的数值模拟。

*** 9612233 Dobry Lateral spreading of sloping ground or of soil near a waterfront is a pervasive and costly type of liquefaction induced ground failure resulting from earthquakes. It causes damage to buildings, bridges, embankments, buried lifelines, and, especially, port facilities. Especially important is the distress caused to pile foundations, as illustrated by case histories in a number of earthquakes, including the 1989 Loma Prieta and 1995 Kobe (Japan) and Manzanillo (Mexico) events. Accumulated losses due to lateral spreading, including effects on piles and port facilities, reaches the billions of dollars. Although progress has been made toward predicting, quantifying and mitigating these effects, there is an urgent need for improved evaluation procedures. The project is part of a cooperative research program with the Universidad Nacional Autonoma de Mexico (UNAM). It focuses on (1) geotechnical centrifuge model testing at Rensselaer Polytechnic Institute (RPI) of earthquake-induced lateral spreading and its effects on single piles and pile groups (2) laboratory static and cyclic loading research at UNAM on soil from Puerto Manzanillo (3) numerical analyses of both lateral spreading and its effects on piles, and (4) associated interpretations and recommendations, with particular emphasis on port facilities. It includes centrifuge modeling at RPI of the Puerto Manzanillo case history during the October 1995 earthquake, and further evaluation of this case history based on the centrifuge results and other information at UNAM. The work of the two groups is closely coordinated. The numerical simulations of the centrifuge model tests on single piles and pile groups subjected to lateral spreading are performed at Cornell University.***