Fast System Identification Using Building Seismic Records and Site Response Study for Microzonation (US-Taiwan/IDNDR)

这是一个合作研究项目，主要围绕台湾中央气象局（CWB）目前正在进行的强震仪器项目，安装1000个数字强震仪岛上的站点（大约60%的自由场地和40%的结构安装）。这一最新进展开辟了新的可能性，从根本上改变强震数据的收集、分析、并为利用自由场和井下强震资料进行地震微带现场反应研究提供了新的契机。为了充分利用新系统的潜力，提出了一个三方合作研究计划，包括休斯顿大学、南加州大学、以及国立台湾大学。目标是(1)开发一套实时强震建筑数据处理和分析方法，应用于新的基于个人电脑的系统；(2)发展一套快速识别系统的方法，以在以个人电脑为基础的系统上实施，以生成目前不经常可用的工程数据；(3)利用现有阵列数据和台湾CWB自由场和井下阵列的预期数据，改进微区划场址响应预测方法。本项目侧重于上述第(3)项中确定的地面运动问题。这个合作研究项目利用已经获得资助的地震仪器系统作为试验场，开发强震数据利用的新方法。从而扩大了强运动自由场和结构响应数据的实用性。研究结果可以很容易地应用于美国，合作也将为更大的美国地震工程界提供及时获取从地震中产生的有价值的信息台湾的新系统。

This is a collaborative research project centered around a strong-motion instrumentation project currently undertaken by Taiwan's Central Weather Bureau (CWB) to install 1,000 digital strong-motion stations on the island (approximately 60% free-field and 40% structural installations). This recent development opens up new possibilities to fundamentally change the way building strong-motion data are collected, analyzed, and disseminated and offers new opportunity for site response study for seismic microzonation using the free-field and down-hole strong-motion data. To fully exploit the potential of the new systems, a three-way cooperative research program is proposed that involves the University of Houston, the University of Southern California, and the National Taiwan University. The objectives are (1) to develop a real-time strong-motion building data processing and analysis methodology to be implemented on the new PC-based system, (2) to develop a methodology for fast system identification to be implemented on the PC-based system to generate engineering data not routinely available at present, and (3) to improve methods of site response prediction for microzonation using existing array data and the data expected from the CWB free-field and down-hole arrays in Taiwan. This project focuses on ground motion issues as identified in item (3) above. This cooperative research program uses the already funded seismic instrumentation systems as a testing ground to develop new ways of strong-motion data utilization, thus expanding the usefulness of strong-motion free-field and structural response data. The results of research can be readily applied to the U.S. and the cooperation will also provide the larger U.S. earthquake engineering community with timely access to the valuable information generated from the new systems in Taiwan.