Seismic Responses of High-Rise Buildings Subjected to Extreme Ground Motions of Tohoku Earthquake in Japan

Bai, Yongtao; Akihiko, Kawano; Matsuo, Shintaro; Odawara, Keita

doi:10.4028/www.scientific.net/amr.374-377.2118

Cited by 2 publications

(4 citation statements)

References 5 publications

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“…Japanese earthquakes were also used by Goda and Atkinson (Goda and Atkinson 2009) and Bai et al (Bai et al 2012). Goda and Atkinson (Goda and Atkinson 2009) studied the probabilistic distribution of the peak ductility demand of SDOF systems.…”

Section: Subduction Zone Earthquake Setsmentioning

confidence: 99%

“…Large magnitude earthquakes were also shown to somewhat affect the distribution and suggested that even larger magnitude earthquakes than those used in the study (M≤8.3) could cause significant differences in inelastic demand. Bai et al (Bai et al 2012) considered larger magnitude earthquakes from the 2011 Tohoku event. A total of 6 ground motions, 3 from the Tohoku event and 3 simulated, were used to investigate the seismic demands of high-rise buildings models.…”

Section: Subduction Zone Earthquake Setsmentioning

confidence: 99%

“…(Stapleton et al 2005), Thompson (Thompson 2004), and Bai el al. (Bai et al 2012) and can be considered to produce more statistically significant outcomes.…”

Section: Subduction Zone Earthquake Setsmentioning

confidence: 99%

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Bridge Seismic Retrofit Measures Considering Subduction Zone Earthquakes

Dusicka¹,

Bazaez²,

Knoles³

2015

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Research was conducted to investigate the effect of subduction zone earthquakes on structural damage. The study suggests that large magnitude ground motions of long duration have the potential of significantly increasing the number of inelastic excursions and consequently incur more extensive structural damage as compared to ground motions with similar elastic spectral demands but of shorter duration. This increase in demand plays a crucial role in the Pacific Northwest where a mega subduction zone earthquake is impending. Typical reinforced concrete bridge bents constructed in the 1950 to mid-1970 in the State of Oregon were designed and built with minimum seismic considerations. This resulted in inadequate detailing within plastic hinge zones, leaving numerous RC bents highly susceptible to damage following an earthquake. In this study, the cyclic performance of an asbuilt RC square column and a reinforced concrete bridge bent retrofitted using buckling restrained braces (BRBs) was experimentally evaluated using quasi-static cyclic loading protocols aiming to reflect subduction zone earthquake demands up to displacement ductility. The buckling restrained braces were designed as replaceable elements in order to take the earthquake-induced energy and dissipate it through nonlinear hysteretic behavior. Two BRB designs were considered in the study in an effort to assess the influence of BRB stiffness on the overall structural performance. The results of these large-scale experiments successfully demonstrated the effectiveness of utilizing buckling restrained braces for achieving high displacement ductility of the retrofitted structure, while also controlling the damage of the existing vulnerable reinforced concrete bent up to the design performance levels. The potential of improving the overall seismic behavior and the design performance levels with BRBs offers structural design professionals a viable method for performance driven retrofit of reinforced concrete bents. 17. Key Words Subduction zone earthquakes, reinforced concrete bridge bents, plastic hinge zone, performance levels, bridge seismic retrofit, quasi-static loading protocol, buckling restrained braces.18. Distribution Statement: Copies available from NTIS, and online at

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Section: Subduction Zone Earthquake Setsmentioning

confidence: 99%

Section: Subduction Zone Earthquake Setsmentioning

confidence: 99%

See 1 more Smart Citation

Bridge Seismic Retrofit Measures Considering Subduction Zone Earthquakes

Dusicka¹,

Bazaez²,

Knoles³

2015

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“…Masayuki Nagano [11] conducted a study on long-period ground motion activity in the Kanto and Kansai regions, focusing on the earthquakes recorded in 2011 in East Japan. In their study, Bai [12] examined the seismic performance of a pre-existing high-rise steel frame structure in Japan. The analysis was conducted by considering the far-field harmony and seismic input, specifically focusing on the structure's response to vibrations occurring in a distant location.…”

Section: Introductionmentioning

confidence: 99%

Failure Probability and Economic Loss Assessment of a High-Rise Frame Structure under Synthetic Multi-Dimensional Long-Period Ground Motions

Zhang,

Jiang

2024

Buildings

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Multiple research studies and seismic data analyses have shown that multi-directional long-period ground motion affects crucial and intricate large-scale structures like oil storage containers, long-span bridges, and high-rise buildings. Seismic damage data show a 3–55% chance of long-period ground motion. To clarify, the chance of occurrence is 3% in hard soil and 83% in soft soil. Due of the above characteristics, the aseismic engineering field requires a realistic stochastic model that accounts for long-period multi-directional ground motion. A weighted average seismic amplification coefficient selected NGA database multi-directional long-period ground motion recordings for this study. Due to the significant low-frequency component in the long-period ground motion, this research uses empirical mode decomposition (EMD) to efficiently decompose it into a composite structure with high- and low-frequency components. Given the above, further investigation is needed on the evolutionary power spectrum density (EPSD) functions of high- and low-frequency components. Analyzing the recorded data will reveal these functions and their corresponding parameters. Proper orthogonal decomposition (POD) is needed to simulate samples of high- and low-frequency components in different directions. These samples can be combined to illustrate multi-directional long-period ground motion. Representative samples exhibit the seismic characteristics of long-period multi-directional ground motion, as shown by numerical examples. This proves the method’s engineering accuracy and usefulness. Moreover, this study used incremental dynamic analysis (IDA) to apply seismic vulnerability theory. This study investigated whether long-period ground motions in both x and multi-directional directions could enhance the seismic response of a high-rise frame structure. By using this method, a comprehensive seismic economic loss rate curve was created, making economic loss assessment clearer. This study shows that multi-directional impacts should be included when studying seismic events and calculating structure economic damages.

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Seismic Responses of High-Rise Buildings Subjected to Extreme Ground Motions of Tohoku Earthquake in Japan

Cited by 2 publications

References 5 publications

Bridge Seismic Retrofit Measures Considering Subduction Zone Earthquakes

Bridge Seismic Retrofit Measures Considering Subduction Zone Earthquakes

Failure Probability and Economic Loss Assessment of a High-Rise Frame Structure under Synthetic Multi-Dimensional Long-Period Ground Motions

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