Geotechnical Earthquake Engineering Reconnaissance of the September 21, 1999, Taiwan Earthquake

[摘要]1999年9月21日，台湾南投县赤赤附近发生7.6级地震，造成大量人员伤亡。桥梁和水坝遭到严重破坏，由于地形多山，发生了数百次山体滑坡，其中包括几次非常大的灾难性山体滑坡。这次地震的一个非常重要的特征是逆断层破裂，垂直位移从南段2米到北端8米不等。断层破裂延伸到高度发达的地区，对主要交通和河流控制结构造成了很大的破坏。由于加州北部和南部的大部分地区沿着活动断层轨迹有广泛的基础设施发展，因此观察和记录台湾地震中大断层位移的直接影响对美国地震工程界具有明显的实践和研究兴趣。这一行动为一个协调的产学研侦察小组提供了部分支持，以尽可能详细地记录这次地震的岩土和工程地质/地震学特征。特别令人感兴趣的是大地震断层偏移对城市基础设施的影响。与所有震后侦察调查一样，预计台湾这次地震将提供重要的记录和数据。从科学的角度来看，这些大地震就像全尺寸的实验，不能通过实验室或实地的控制实验来复制。正是通过快速反应侦察工作，才能从这些事件中恢复大部分短暂的数据，并将其用于进一步推进减轻地震危害的工作。这项调查的结果有望提供信息和数据，帮助专业人士了解大型地震断层偏移对城市基础设施的影响。这是一个多机构奖，涉及加州大学伯克利分校和南加州大学。

Abstract0072688A magnitude 7.6 earthquake occurred on September 21, 1999, near Chi-Chi in Nantou county, Taiwan, about 90 miles south of Taipei, resulting in extensive damage, injuries and loss of life. Extensive damage occurred to bridges and dams and, due to the mountainous nature of the terrain, there were hundreds of s landslides, including several very large catastrophic landslides. A very important feature of this earthquake was the reverse fault rupture with vertical displacements ranging from 2 meters along the southern section to as much as 8 meters along the northern terminus. The fault rupture extends through heavily developed areas and is responsible for much of the damage to major transportation and river control structures. Since much of northern and southern California has extensive infrastructure development along active fault traces, observing and documenting the direct impact of large fault displacement in the Taiwan earthquake is of obvious practical and research interest to the US earthquake engineering community.This action provides partial support for a coordinated industry-academia reconnaissance team to document the geotechnical and engineering geology/seismology features of this earthquake in as much detail as possible. Of particular interest is the impact of large seismic fault offset on urban infrastructure.As with all post-earthquake reconnaissance investigations, it is expected that vital records and data will become available as a result of this earthquake in Taiwan. From a scientific viewpoint, these large earthquakes act as full scale experiments that cannot be duplicated via controlled experiments in the laboratory or in the field. It is through quick response reconnaissance efforts that the mostly-ephemeral data from these events can be recovered and used to further advances in earthquake hazard mitigation. The results from this investigation are expected to yield information and data that will help the profession to understand the impact of large seismic fault offset on urban infrastructure.This is a multi-institutional award involving the University of California at Berkeley and the University of Southern California.