当前位置: X-MOL 学术Bull. Earthquake Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Response study of a 51-story-tall Los Angeles, California building inferred from motions of the Mw7.1 July 5, 2019 Ridgecrest, California earthquake
Bulletin of Earthquake Engineering ( IF 3.8 ) Pub Date : 2021-02-19 , DOI: 10.1007/s10518-021-01053-9
Mehmet Çelebi , Daniel Swensen , Hamid Haddadi

A 51-story building in downtown Los Angeles that is equipped with a seismic monitoring accelerometric array recorded the Mw7.1 Ridgecrest, California earthquake of July 5, 2019. The building is a dual-core reinforced-concrete shear-wall and perimeter-column structure with ~ 80% of floors constructed as post-tensioned flat slabs, which makes it a trending design. Using system identification methods, spectral analyses, and coherence-phase angle computations, the recorded response data allowed the identification of dynamic response characteristics (fundamental frequencies of [NS] 0.21 Hz, [EW] 0.28 Hz, and [Torsional] 0.45 Hz, critical damping percentages < 2.5%, and associated mode shapes), as well as computation of drift ratios with maximum peaks of 0.145% for both NS and EW directions. The critical damping percentages are consistent with those recommended by LATBSDC (2017). There is no indication from the records that post-tensioned slab design played any role in altering the dynamic characteristics.



中文翻译:

根据Mw7.1的运动推断出的加利福尼亚州洛杉矶市51层高的建筑的响应研究2019年7月5日

洛杉矶市中心一栋51层的建筑,装有地震监测加速度计阵列,记录了2019年7月5日加利福尼亚州里奇克莱斯特Mw7.1地震。该建筑是双芯钢筋混凝土剪力墙和周长柱约有80%的地板构造为后张拉平板,这使其成为一种趋势设计。使用系统识别方法,频谱分析和相干相角计算,记录的响应数据可以识别动态响应特性([NS] 0.21 Hz,[EW] 0.28 Hz和[Tortional] 0.45 Hz的基本频率,临界阻尼百分比<2.5%,以及相关的振型),以及计算NS和EW方向最大峰值为0.145%的漂移比。临界阻尼百分比与LATBSDC(2017)推荐的百分比一致。从记录中没有迹象表明,后张板设计在改变动力特性方面起了任何作用。

更新日期:2021-02-19
down
wechat
bug