Responses of a Tall Building in Los Angeles, California, as Inferred from Local and Distant Earthquakes
Responses of a Tall Building in Los Angeles, California, as Inferred from Local and Distant Earthquakes
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根据本地和远程地震推断的加利福尼亚州洛杉矶一栋高层建筑的响应
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
N. Nakata
中科院分区：
文献类型：
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作者：
M. Çelebi;H. Ulusoy;N. Nakata
在美国和其他地方，越来越多的高层建筑可能会受到近震源和远震源产生的运动的影响，这些运动会造成长期影响。从东京和大阪∼的高层建筑中检索到了多组显示这种影响的记录，分别位于2011年东北地震震中350公里和770公里处。在加利福尼亚州，很少有高层建筑被安装仪器。洛杉矶市中心一座52层的仪表式建筑记录了七次本地和远处的地震。频谱和系统识别方法显示出显著的低频(∼0.17赫兹、0.56赫兹和1.05赫兹)。这些频率与由传递函数计算的频率相比很好；然而，在七次地震中每一次的显著低频之间都观察到了微小的变化。扭转频率和平动频率非常接近，并且是耦合的。在七次地震数据中，至少有两次观察到了跳动效应。
The increasing inventory of tall buildings in the United States and elsewhere may be subjected to motions generated by near and far seismic sources that cause long-period effects. Multiple sets of records that exhibited such effects were retrieved from tall buildings in Tokyo and Osaka ∼350 km and 770 km, respectively, from the epicenter of the 2011 Tohoku earthquake. In California, very few tall buildings have been instrumented. An instrumented 52-story building in downtown Los Angeles recorded seven local and distant earthquakes. Spectral and system identification methods exhibit significant low frequencies of interest (∼0.17 Hz, 0.56 Hz, and 1.05 Hz). These frequencies compare well with those computed by transfer functions; however, small variations are observed between the significant low frequencies for each of the seven earthquakes. The torsional and translational frequencies are very close and are coupled. Beating effect is observed in at least two of the seven earthquake data.