Simulating the Response of High-Rise Buildings to Great and Giant Subduction Earthquakes

模拟高层建筑对巨大俯冲地震的响应

• 批准号: 0610100
• 负责人: Thomas Heaton
• 金额: $ 13.84万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-15 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0610100&HistoricalAwards=false
• 关键词: Simulating; Response; Rise; Buildings; Great

The goal of this research is to investigate how high-rise buildings may perform in large subduction earthquakes. This includes giant earthquakes (Mw9) such as are expected on the Cascadia subduction zone. Unfortunately, strong ground motions have never been recorded from such events, although they are expected to be rich in long periods and have long durations. Currently, the M 8.3, 2003 Tokachi-Oki earthquake is the largest well recorded subduction earthquake; 276 high-quality strong motion records are available from Hokkaido Island for this event. This research team has analyzed these 276 ground motion recordings and has simulated their importance to 6- and 20-story steel moment-frame buildings that were designed according to the 1994 Uniform Building Code. Although there were no such buildings in the strongly shaken regions of Hokkaido, these simulations indicate that if there had been high-rise buildings, then they would have been strongly excited throughout the coastal region, with the potential for collapse in some locations.The primary focus of this 2-year research project is to extend the existing work on the Tokachi-Oki earthquake to infer the performance of high-rise buildings in even larger magnitude earthquakes. It is proposed to use the empirical Green's function technique to simulate a M 9 earthquake on the Cascadia subduction zone. Using the 2003 Tokachi-Oki earthquake as source of Green's functions, the research team will simulate both strong motion and teleseismic body waves for the 2004 Sumatran earthquake (M 9.2). Careful attention will be given to the amplification of long period waves in the Seattle basin. Simulated ground motions will be used as inputs to the nonlinear analysis of steel frame buildings. This study should provide an assessment of current the adequacy of current design procedures used for high-rise buildings in the Pacific Northwest.

这项研究的目的是调查高层建筑在大型俯冲地震中的表现。这包括巨大的地震（Mw9），如预计在卡斯卡迪亚俯冲带。不幸的是，强烈的地面运动从来没有记录到这样的事件，虽然他们预计将丰富的长周期和长的持续时间。目前，2003年十胜冲地震是有记录的最大的俯冲地震，从北海道岛可获得276个高质量的强震记录。该研究小组分析了这276个地面运动记录，并模拟了它们对根据1994年统一建筑规范设计的6层和20层钢框架建筑的重要性。虽然在强烈震动的北海道地区没有这样的建筑物，但这些模拟表明，如果有高层建筑，那么它们将在整个沿海地区强烈震动，一些地点有倒塌的可能性。这个为期2年的研究项目的主要重点是扩展十胜冲木地震的现有工作，以推断高地震的表现在更大规模的地震中建造建筑物。本文建议用经验绿色函数技术模拟卡斯卡迪亚俯冲带上的一次9级地震。利用2003年十胜冲地震作为绿色函数的震源，研究小组将模拟2004年夏季地震（M 9.2）的强震和地震体波。将对西雅图盆地的长周期波的放大给予仔细的注意。模拟地震动将被用作钢框架建筑物非线性分析的输入。这项研究应提供一个评估目前的充分性，目前的设计程序用于高层建筑在太平洋西北地区。