Collaborative Research: Investigation of Site Effects, Seismic Compression, and Liquefaction in the June 23, 2001, Southern Peru Earthquake

【摘要】201574，华盛顿州立大学Adrian Rodriguez-Marek，“合作研究：2001年6月23日秘鲁南部地震的场地效应、地震压缩和液化研究”，在过去的25年中，全球最大的地震事件是2001年6月23日的秘鲁南部地震（Mw = 8.4）。它破坏了莫克瓜、塔克纳、阿雷基帕、卡马纳和伊洛等城市及其周边地区。美国和秘鲁研究人员组成的一个合作小组在地震发生后不久对该地区进行了地质技术勘察。主要发现包括：(i)某些地区的结构破坏集中表明，场地和地形可能对所造成的破坏程度产生了影响；（ii）由于地震压缩、液化、滑坡和落石，受影响地区的道路和桥梁受到相当大的破坏。大震级地震事件，如秘鲁南部地震，提供了一个机会，通过开发和研究详细的案例历史来推进岩土地震工程实践的状态。这些案例研究对于现有设计程序和地震规范的校准是非常宝贵的，并且它们通常作为开发新的，更可靠的分析程序的跳板。华盛顿州立大学和德雷塞尔大学之间的这项合作研究的目标是：(1)记录和研究塔克纳和莫克瓜城市的遗址扩大和地形效应；(2)开发和分析压实填料地震压缩的历史案例；(3)收集和评估液化和相关横向扩散的历史案例。该研究计划利用了研究人员目前与秘鲁天主教大学的工作关系，以及他们与当地政府官员、工程学会和工业界的联系。这项研究包括几项任务：(a)发展具有代表性的地面运动，(b)通过测试钻孔、横波速度测量和实验室实验来描述地下条件，(c)编写和发展详细的案例历史，(d)分析案例历史，以及(e)及时传播数据和发现。病例历史和相关数据将在一个专门的互联网网站上免费提供，该网站将以英语和西班牙语开发，使美国和国外的个人都可以访问。这项研究将为专业人士提供一系列案例研究，可用于校准或验证现有的设计和分析程序。它还将有助于开发新的或更新的分析程序、建筑设计规范和地震指南。这一发现将对全世界的地震安全界产生影响，尤其与太平洋西北部和阿拉斯加等地区有关，因为这些地区的地震危险是由俯冲事件控制的。

Abstract0201574, Adrian Rodriguez-Marek, Washington State University"Collaborative Research: Investigation of Site Effects, Seismic Compression, and Liquefaction in the June 23, 2001 Southern Peru Earthquake"During the past 25 years, the largest seismic event worldwide was the Southern Peru Earthquake of June 23, 2001 (Mw = 8.4). It damaged regions in and around the cities of Moquegua, Tacna, Arequipa, Camana, and Ilo. A collaborative team of United States and Peruvian researchers conducted a geotechnical reconnaissance of the region shortly after the event. Among the key finding were: (i) the concentration of structural damage in some areas suggested the influence of site and possibly topographic amplification in the resulting damage levels; (ii) considerable damage occurred to roadways and bridges in the affected regions as a result of seismic compression, liquefaction, landslides, and rockfalls.Large magnitude seismic events such as the Southern Peru Earthquake provide an opportunity to advance the state of geotechnical earthquake engineering practice through the development and study of detailed case histories. These case studies are invaluable for calibration of existing design procedures and seismic codes, and they often serve as a springboard for developing new, more reliable analysis procedures. The objective of this collaborative research between Washington State University and Drexel University is to: (1) document and study site amplification and topographic effects in the cities of Tacna and Moquegua; (2) develop and analyze case histories of seismic compression of compacted fills; and (3) assemble and evaluate case histories of liquefaction and associated lateral spreading. The research plan takes advantage of the investigators' current working relationship with the Catholic University of Peru, and from their contacts with local officials from government, engineering societies, and industry. The research involves several tasks: (a) development of representative ground motions, (b) characterization of subsurface conditions by test borings, shear wave velocity measurements, and laboratory experiments, (c) compilation and development of detailed case histories, (d) analysis of the case histories, and (e) timely dissemination of the data and findings. The case histories and associated data will be freely available on a dedicated Internet site, which will be developed in both English and Spanish to make it accessible to individuals in both the Unites States and abroad.This research will provide the profession with a series of case studies that may be used for calibration or validation of existing design and analysis procedures. It will also aid the development of new or updated analysis procedures and building design codes and seismic guidelines. The findings will have implications for the seismic safety community worldwide, and will be particularly relevant to regions such as the Pacific Northwest and Alaska, where the seismic hazard is controlled by subduction events.