Responses of a Tall Building with U.S. Code-Type Instrumentation in Tokyo, Japan, to Events before, during, and after the Tohoku Earthquake of 11 March 2011

Çelebi, Mehmet; Kashima, Toshihide; Ghahari, S. Farid; Abazarsa, F.; Taciroğlu, Ertuǧrul

doi:10.1193/052114eqs071m

Cited by 19 publications

(12 citation statements)

References 29 publications

(32 reference statements)

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“…The instrumentation layout is shown in Figure 2 and further details may be found in (Çelebi et al 2011). The motivation for this instrumentation effort was the perceived exposure of tall buildings in the East Coast of United States to distant earthquakes that can originate by the relatively dormant faults in the region (Ebel and Hart 2001; Çelebi et al 2014b, 2016a, 2016b).…”

Section: Description Of the Structure And Its Instrumentationmentioning

confidence: 99%

An Investigation of Soil-Structure Interaction Effects Observed at the MIT Green Building

et al. 2016

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The soil-foundation impedance function of the MIT Green Building is identified from its response signals recorded during an earthquake. Estimation of foundation impedance functions from seismic response signals is a challenging task, because: (1) the foundation input motions (FIMs) are not directly measurable, (2) the as-built properties of the super-structure are only approximately known, and (3) the soil-foundation impedance functions are inherently frequency-dependent. In the present study, aforementioned difficulties are circumvented by using, in succession, a blind modal identification (BMID) method, a simplified Timoshenko beam model (TBM), and a parametric updating of transfer functions (TFs). First, the flexible-base modal properties of the building are identified from response signals using the BMID method. Then, a flexible-base TBM is updated using the identified modal data. Finally, the frequency-dependent soil-foundation impedance function is estimated by minimizing the discrepancy between TFs (of pairs instrumented floors) that are (1) obtained experimentally from earthquake data and (2) analytically from the updated TBM. Using the fully identified flexible-base TBM, the FIMs as well as building responses at locations without instruments can be predicted, as demonstrated in the present study.

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Section: Description Of the Structure And Its Instrumentationmentioning

confidence: 99%

An Investigation of Soil-Structure Interaction Effects Observed at the MIT Green Building

et al. 2016

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“…This amplitude of peak roof displacement translates into an average drift ratio of ∼0.5% which, in Japanese practice, is the starting point of damage (Kubo et al 2011). Other studies of recorded responses of tall buildings in Tokyo during the 2011 Tohoku earthquake show similar trends of low structural damping (<3%), permanent shifts of fundamental periods and indications that the responses are affected by basin effects (Çelebi et al 2016a, 2016b). Therefore, studying possible basin effects and extraction of dynamic characteristics (e.g., frequencies and damping) and behavior of the subject building in downtown Los Angeles constitutes an important motivation for this paper.…”

Section: Introductionmentioning

confidence: 67%

Responses of a Tall Building in Los Angeles, California, as Inferred from Local and Distant Earthquakes

Çelebi

Ulusoy²,

Nakata

2016

Earthquake Spectra

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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.

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“…As result, tall buildings in resonance with the first period of the soil deposit amplify the PGA by a factor of 10. These results confirm the conclusions from previous studies about the importance of the combination of site resonance and low damping in the large amplification of accelerations produced on tall buildings for long‐distance earthquakes.…”

Section: Discussionmentioning

confidence: 99%

Seismic hazard in Buenos Aires, Argentina: A preliminary study on the effects of long‐distance earthquakes on tall buildings

Bertero

Vaquero

Mussat

et al. 2018

Earthq Engng Struct Dyn

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Summary The 2015 Illapel earthquake produced self‐evacuation of tall buildings in the city of Buenos Aires, Argentina, located 1280 km away from the epicenter. The ground motions in Buenos Aires due to the main event (Mw 8.3) and its aftershocks were registered by a new seismometer. The data collected allowed to estimate the maximum story drift ratios and top floor accelerations for tall buildings in Buenos Aires. The similarities between the response spectra and the Fourier amplitude spectra for the mainshock and its aftershocks show the influence that the dynamic properties of the 300‐m soil deposit have on the large acceleration amplification produced in these groups of buildings.

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Responses of a Tall Building with U.S. Code-Type Instrumentation in Tokyo, Japan, to Events before, during, and after the Tohoku Earthquake of 11 March 2011

Cited by 19 publications

References 29 publications

An Investigation of Soil-Structure Interaction Effects Observed at the MIT Green Building

An Investigation of Soil-Structure Interaction Effects Observed at the MIT Green Building

Responses of a Tall Building in Los Angeles, California, as Inferred from Local and Distant Earthquakes

Seismic hazard in Buenos Aires, Argentina: A preliminary study on the effects of long‐distance earthquakes on tall buildings

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