Earthquake-Resistant Design and Remediation of Lifelines and Deep Foundations Subjected to Liquefaction: Centrifuge Modeling and Engineering Interpretations

1995年的孝根-南方大地震夺走了5500多人的生命，造成了超过1000亿美元的损失。天然气、供水和电力公用事业线路恢复正常。高速公路、铁路和地铁上的桥梁和立交桥坍塌。高层住宅和办公建筑遭到严重破坏。液化的土壤沿海岸、码头、海堤和码头横向沉降和扩散。长达数公里的码头和码头墙在海岸和人工岛--港岛和罗科岛--倾斜和定居。整个神户港几乎被完全摧毁。这场城市灾难是由一场直接发生在人口稠密的城市地区的地震造成的。幸运的是，自从1994年北岭地震释放出远离人口稠密地区的能量以来，加利福尼亚州的圣费尔南多山谷避免了类似的破坏。这一行动是为了支持一个由美国和日本研究人员组成的团队参与的合作研究项目。美方包括康奈尔大学、伦斯勒理工学院和南加州大学的教授和学生。几个美国政府和行业组织也同意合作，包括多学科地震工程研究中心[MCEER-前身为NCEER]、太平洋天然气和电力公司(PG&Amp；E)、美国陆军工程兵团、美国地质调查局和伍德沃德-克莱德咨询公司。在日本方面，该团队由来自京都大学、东京工业大学、东京大学、早稻田大学和山口大学的教授和学生组成。几个日本政府和行业组织也将参与这项研究工作。主要目的是研究1994年北岭地震和1995年玄武地震中液化引起的变形对地基和生命线系统的影响，并提出在未来地震中减轻这些破坏性影响的工程解决方案。研究小组的研究结果将有助于美国和日本在岩土和结构工程中实施基于性能的设计。

The 1995 Hyogoen-Nanbu earthquake claimed more than 5500 lives and caused damage in excess of 100 billion dollars. Gas, water, and electric utility lines reptured. Bridges and overpasses on highways, railroads and subways collapsed. High-rise residential and office structures were severely damaged. Liquefied soils settled and spread laterally along the coast and in docks, piers, sea walls, and quays. Kilometers of docks and quay walls titled and settled both at the coast and in the man-made islands, Port Island and Rokko Island. The entire port of Kobe was almost completely destroyed. This urban disaster resulted from an earthquake striking directly within a densely populated urban area. A similar devastation was fortunately avoided in the San Fernando Valley in California since the 1994 Northridge earthquake released its energy away from populated areas.This action is to support a collaborative research program involving a team of US and Japanese researchers. The US side includes professors and students form Cornell University, Rensselaer Polytechnic Institute, and the University of Southern California. Several US government and industry organizations have also agreed to cooperate, including the Multidiciplinary Center for Earthquake Engineering research [MCEER- formerly NCEER], the Pacific Gas and Electric Company (PG&E), U.S. Army Corps of Engineers, U.S. Geological survey, and Woodward-Clyde Consultants. On the Japanese side, the team consists of professors and students from Kyoto University, Tokyo Institute of Technology, University of Tokyo, Waseda University, and Yamaguchi University. Several Japanese government and industry organizations will also contribute to the research effort. The main objective is to investigate the effects of liquefaction induced deformation on foundations and lifeline systems in the 1994 Northridge and 1995 Hyogoken-Nanbu earthquakes, and to propose engineering solutions to mitigate these devastating effects in future earthquakes. The findings of the research teams will contribute to the implementation of performance-based design in geotechnical and structural engineering in the United States and Japan.