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

地震引起土体液化横向扩展及其对桩基港口设施影响的试验研究

• 批准号: 9612233
• 负责人: Ricardo Dobry
• 金额: $ 27.51万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-15 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9612233&HistoricalAwards=false
• 关键词: Experimental; Study; Earthquake; Induced; Soil

*** 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.***

*** 9612233 Dobry 倾斜地面或海滨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。 它会对建筑物、桥梁、路堤、埋藏的生命线，尤其是港口设施造成损害。 特别重要的是对桩基造成的破坏，正如许多地震的历史案例所表明的那样，包括 1989 年洛马普列塔地震、1995 年神户（日本）和曼萨尼约（墨西哥）地震。 由于横向扩散造成的累计损失（包括对桩和港口设施的影响）达到数十亿美元。 尽管在预测、量化和减轻这些影响方面已经取得了进展，但仍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) 合作研究项目的一部分。 它的重点是 (1) 伦斯勒理工学院 (RPI) 的岩土离心模型测试，地震引起的横向扩展及其对单桩和群桩的影响 (2) 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载荷研究 (3) ）横向扩展及其对桩的影响的数值分析，以及（4）相关的解释和建议，特别强调港口设施。 它包括 RPI 对 1995 年 10 月地震期间曼萨尼约港案例历史的离心机建模，以及根据离心机结果和墨西哥国立自治大学的其他信息对该案例历史的进一步评估。 两个小组的工作密切配合。 在康奈尔大学进行了单桩和群桩横向扩展离心模型试验的数值模拟。***