The 2011 off the Pacific coast of Tohoku earthquake and response of high-rise buildings under long-period ground motions
The 2011 off the Pacific coast of Tohoku earthquake and response of high-rise buildings under long-period ground motions
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DOI：
10.1016/j.soildyn.2011.06.001
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发表时间：
2011-11-01
影响因子：
4
通讯作者：
Tsuji, M.
中科院分区：
文献类型：
--
作者：
Takewaki, I.;Murakami, S.;Tsuji, M.
2011年3月11日下午，日本东部遭受2011年东北太平洋沿岸地震（东日本大地震）的重创。截至2011年4月11日，那场地震以及随后引发的巨大海啸已导致近3万人死亡或仍然失踪。本文报道了这场袭击一个在抗震设计方面先进的国家的毁灭性地震的一些情况。据报道，东京、名古屋和大阪都引发了长周期地震动。从临界激励的角度讨论了这些长周期地震动的特性，并确定和讨论了两座分别为40层和60层的钢结构建筑在东京新宿记录到的长周期地震动作用下的抗震性能。本文还报道了像高硬度橡胶阻尼器这类粘弹性阻尼器在减少此类长周期地震动作用下的超高层建筑响应方面的有效性。除了最大响应减少量外，还详细研究了响应减少率。在此次地震前的2010年12月，日本三个大城市（东京、名古屋和大阪）提供了用于高层建筑抗震设计的模拟长周期地震动，并划分了九个区域。两座40层的钢结构建筑（分别为稍柔性和刚性）在这九个区域受到这些长周期地震动作用，以详细研究不同区域超高层建筑的响应特性。（C）2011爱思唯尔有限公司。保留所有权利。
In the afternoon of March 11, 2011, the eastern Japan was severely attacked by the 2011 off the Pacific coast of Tohoku earthquake (the Great East Japan earthquake). Nearly 30,000 people were killed or are still missing by that earthquake and the ensuing monster tsunami as of April 11, 2011. This paper reports some aspects of this devastating earthquake which hit an advanced country in seismic resistant design. It has been reported that long-period ground motions were induced in Tokyo, Nagoya and Osaka. The properties of these long-period ground motions are discussed from the viewpoint of critical excitation and the seismic behavior of two steel buildings of 40 and 60 stories subjected to the long-period ground motion recorded at Shinjuku, Tokyo is determined and discussed. This paper also reports the effectiveness of visco-elastic dampers like high-hardness rubber dampers in the reduction of responses of super high-rise buildings subjected to such long-period ground motions. The response reduction rate is investigated in detail in addition to the maximum response reduction. In December 2010 before this earthquake, simulated long-period ground motions for earthquake resistant design of high-rise buildings were provided in three large cities in Japan (Tokyo, Nagoya and Osaka) and nine areas were classified. Two 40-story steel buildings (slightly flexible and stiff) are subjected to these long-period ground motions in those nine areas for the detailed investigation of response characteristics of super high-rise buildings in various areas. (C) 2011 Elsevier Ltd. All rights reserved.