Evaluation of Directionality Considering Periodic Characteristics for Strong Motion Observation Records

Inoue, Kei; K, Saitoh; Umeyama, Yuta; Igarashi, Akira; Ikeda, Takaaki

doi:10.2208/jscejseee.76.4_i_205

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…In order to analyze the ground motion characteristics more clearly, the response spectrum of the ground motion record is calculated, as shown in Figure 9(a). Reference (Inoue et al. , 2020) takes the horizontal two-way seismic action as the input and calculates the omnidirectional response spectrum calculated by the single-mass oscillator, as shown in Figure 9(b).…”

Section: Ground Motion Analysismentioning

confidence: 99%

“…Reference (Inoue et al, 2020) takes the horizontal two-way seismic action as the input and calculates the omnidirectional response spectrum calculated by the single-mass oscillator, as shown in Figure 9(b). The predominant angle for seismic records from the omnidirectional acceleration response spectrum is approximately 538.…”

Section: Seismic Performance Of Girder Bridgementioning

confidence: 99%

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Seismic performance of continuous curved girder bridge with high pier in Maduo earthquake and characteristic analysis

Yong

Song

2022

MMMS

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PurposeThe purpose of this study is to explore the seismic damage mechanism of the Dayemaling Bridge during the Maduo earthquake and discuss the seismic damage characteristics of the high-pier curved girder bridge.Design/methodology/approachIn this study, the numerical simulation method is used to analyze the seismic response using synthetic near-field ground motion records.FindingsThe near-field ground motion of the Maduo earthquake has an obvious directional effect, it is more likely to cause bridge seismic damage. Considering the longitudinal slope of the bridge and adopting the continuous girder bridge form, the beam end displacement of the curved bridge can be effectively reduced, and the collision force of the block and the bending moment of the pier bottom are reduced, so the curved bridge with longitudinal slope is adopted.Originality/valueCombined with the seismic damage phenomenon of bridges in real earthquakes, the seismic damage mechanism and vulnerability characteristics of high-pier curved girder bridges are discussed by the numerical simulation method, which provides technical support for the application of such bridges in high seismic intensity areas.

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Section: Ground Motion Analysismentioning

confidence: 99%

Section: Seismic Performance Of Girder Bridgementioning

confidence: 99%

Seismic performance of continuous curved girder bridge with high pier in Maduo earthquake and characteristic analysis

Yong

Song

2022

MMMS

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“…For instance, the response spectrum obtained by calculating the seismic response of a SDOF system can only reflect the seismic characteristics of a particular direction in an earthquake, failing to present a comprehensive view of the directional characteristics of an earthquake or seismic sequences. In this regard, Inoue et al (2020) proposed the omni-directional response spectrum, which is obtained by calculating the seismic response of a SDOF system under horizontal bidirectional ground motions. The omni-directional response spectrum can reflect the ground motion characteristics more comprehensively, especially the directional characteristics.…”

Section: Introductionmentioning

confidence: 99%

Omni-directional input energy spectrum of seismic sequence and performance of bridges in Yangbi earthquake

Huang,

Xie,

Zhu

et al. 2024

Preprint

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In this study, a method of omni-directional input energy spectrum is proposed for the characteristics of seismic sequences and their effects on bridge structures, which can comprehensively analyze bidirectional seismic characteristics in order to clearly reveal the directional features of ground motions. The Yangbi earthquake sequence is chosen as the research object, and its characteristics are analyzed in depth using the omni-directional response spectrum and the omni-directional input energy spectrum. Meanwhile, numerical simulations of two typical bridges in Yangbi earthquake were conducted, and Park-Ang damage index was used to analyze the cumulative damage effect of the seismic sequence on the bridges as well as the influence of seismic directivity on the bridge damage. The results revealed that: the seismic sequence can exacerbate the structural damage caused by the mainshock; the foreshock and aftershock can change the overall seismic directivity and frequency spectrum characteristics of the seismic sequence; the dominant direction of the omni-directional input energy spectrum reflects the directional characteristics of the ground motions; the seismic directivity has a significant impact on the bridge structure, and in the case study the bridge damage is more severe when the bridge axis is parallel to the dominant direction of the omni-directional input spectrum of the ground motions than the original condition.

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Seismic damage analysis of Yematan Bridge under near-fault earthquakes

Lin

Yong

et al. 2022

Structures

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Evaluation of Directionality Considering Periodic Characteristics for Strong Motion Observation Records

Cited by 4 publications

References 4 publications

Seismic performance of continuous curved girder bridge with high pier in Maduo earthquake and characteristic analysis

Seismic performance of continuous curved girder bridge with high pier in Maduo earthquake and characteristic analysis

Omni-directional input energy spectrum of seismic sequence and performance of bridges in Yangbi earthquake

Seismic damage analysis of Yematan Bridge under near-fault earthquakes

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