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

1999年9月21日，台湾南投县集集附近发生7.6级地震，造成大面积的破坏、人员伤亡。 桥梁和水坝遭到广泛破坏，由于地形多山，发生了数百次山体滑坡，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，其垂直位移范围从沿着南段的2米到沿北方终点的沿着高达8米。 断层破裂延伸穿过高度发达的地区，并对主要交通和河流控制结构的大部分破坏负责。 由于北方和南部加州的大部分地区都有广泛的基础设施开发，沿着活动断层痕迹，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际和研究意义。这一行动为一个协调的工业和学术界勘察小组提供了部分支持，以记录岩土和工程地质学。尽可能详细地介绍这次地震的地震学特征。 特别值得注意的是，大地震断层偏移对城市基础设施的影响。与所有地震后的勘察一样，预计台湾地震将提供重要的记录和数据。 从科学的角度来看，这些大地震是一个全面的实验，无法通过实验室或现场的控制实验来复制。 正是通过快速反应的侦察工作，这些事件的大多数短暂的数据可以恢复和用于进一步推进减轻地震灾害。 这项调查的结果预计将产生信息和数据，这将有助于专业人士了解大地震断层偏移对城市基础设施的影响。这是一个多机构的奖项，涉及加州大学伯克利分校和南加州大学。

Abstract0072877A 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.