Investigation on the 921 Ji-Ji Earthquake, Taiwan, of 21 September 1999

1999 年 9 月 21 日台湾 921 集集地震调查

• 批准号: 11800012
• 负责人: IEMURA Hirokazu
• 金额: --
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11800012/
• 关键词: 921 Ji-Ji Earthquake; Plate Boundary; Inland Earthquake; Strong Earthquake Record; Damage of Buildings; Damage of Bridges; Damage of Lifeline; Urban Disaster

This research was carried out by 15 researchers for the investigation into the damage and collection of information and data during early October to December 1999. The following became clear after the investigation.* The Philippine Sea plate subducts along the Ryukyu Trench beneath the Eurasian plate. The Eurasian plate is underthrusting beneath the Philippine Sea plate, this caused the earthquake. The maximum dislocation measured at ground surface was about 10 meters vertically, and several meters horizontally.* Before the earthquake, more than 700 strong motion observation stations have been distributed and maintained by the Central Weather Bureau, Ministry of Transportation and Communications, Taiwan. Near the epicenter, very strong acceleration, over 900 gals, was recorded. Furthermore, the velocity record from the integrated result of the acceleration record near the northern end of the fault was over 300 kine.* Many transportation facilities (including highway bridges, railway bridges and tunnels) suffered damage. It can be guessed that the most governmental factor of the damage is differential ground displacements in vertical and horizontal directions caused by the faulting.* The concrete gravity dam was damaged by the surface faulting. This will rise a new technical subject of the earthquake resistance of infrastructures against fault displacements.* The power supply system in Taiwan is concentrated on the one switching yard, and the earthquake hit it directly. Therefore the redundancy of the power system is necessary.

这项研究是由15名研究人员在1999年10月初至12月期间为调查损害和收集资料和数据而进行的。调查结束后，以下情况变得清晰起来：*菲律宾海板块沿着琉球海沟俯冲到欧亚板块之下。亚欧大陆板块向菲律宾海板块下方俯冲，从而引发了地震。地面测得的最大位移量垂直约10米，水平数米。*地震前，台湾交通运输部中央气象局已分布和维护了700多个强震观测站。在震中附近，记录到了非常强的加速度，超过900加仑。此外，断层北端附近的加速度记录综合结果的速度记录超过300公里。*许多交通设施(包括公路桥、铁路桥和隧道)遭到破坏。可以推测，破坏的最主要控制因素是断层引起的地表垂直方向和水平方向的差异位移。*地表断层破坏了混凝土重力坝。这将引发基础设施抗断层位移抗震的新技术课题。*台湾的供电系统集中在一个开关场，地震直接袭击了它。因此，电力系统的冗余是必要的。

项目成果

家村 浩和: "1999年台湾921集集地震による土木構造物の被害"第46回構造工学シンポジウム特別講演集. 41-48 (2000)

Hirokazu Iemura：“1999年台湾921 Chichi地震对土木工程结构的损害”第46届结构工程研讨会论文集41-48（2000）。

Kazuhiko Kawashima, et al: "Damage of Bridges in Ji-Ji (Taiwan) Earthquake 1999"Bridge and Foundation Engineering. Vol.34, No.4. 15-23 (2000)

Kazuhiko Kawashima 等人：“1999 年集集（台湾）地震中桥梁的损坏”桥梁和基础工程。

Hirokazu Iemura: "The damage of civil structures due to the 921 Ji-Ji earthquake, 1999 Taiwan"Special Report of 46th Structural Engineering Symposium, JSCE. 41-48 (2000)

家村博和：《1999年台湾921集集地震对土木结构的破坏》日本土建学会第46届结构工程研讨会特别报告。

塩原等: "建築物の被害(鎮における学校建物被害)"文部省 台湾921集集地震調査報告書. <印刷中).

Shiobara 等人：“建筑物损坏（城镇学校建筑损坏）”，台湾教育部 921 收集地震调查报告<正在出版）。

大槻憲四郎 他: "9.21台湾集集地震における断層とトレースに沿った変位ベクトル分布"文部省 台湾921集集地震調査報告書. (印刷中).

Kenshiro Otsuki 等：“台湾 9.21 集集地震期间断层和痕迹的位移矢量分布”，教育部，台湾 921 集集地震调查报告（正在出版）。