An improved defining parameter for long-period ground motions with application of a super-tall building

Zhou, Ying; Ping, Tianyao; Gong, Shunming; Yi, Zhu

doi:10.1016/j.soildyn.2018.06.018

Cited by 16 publications

(5 citation statements)

References 26 publications

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“…Zhou et al [59] proposed an improved frequency domain definition parameter β l that does not require seismic information and can discriminate long-period ground motions based on the statistical analysis of 39,744 strong ground motions obtained from the PEER database [59], as presented in Table 4. In this study, long-period ground motion and shortperiod ground motion are identified using the method proposed by Zhou et al [59]. The lists of short-and long-period ground motions selected in this study are shown in Tables 5 and 6, respectively.…”

Section: Strong Ground Motion Selectionmentioning

confidence: 99%

Seismic Resilience Assessment of Curved Reinforced Concrete Bridge Piers through Seismic Fragility Curves Considering Short- and Long-Period Earthquakes

Uenaga,

Omidian,

George

et al. 2023

Sustainability

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Curved bridges are commonly used for logistics and emergencies in urban areas such as highway interchange bridges. These types of bridges have complicated dynamic behaviors and also are vulnerable to earthquakes, so their functionality is a critical parameter for decision makers. For this purpose, this study aims to evaluate the bridge seismic resilience under the effects of changes in deck radius (50, 100, 150 m, and infinity), pier height irregularity (Regular and Irregular), and incident seismic wave angle (0°, 45°, and 90°) under short- and long-period records. In the first step, fragility curves are calculated based on the incremental dynamic analysis and probabilistic seismic demand models. Finally, seismic resilience curves/surfaces are constructed and their interpolated values of the log-normal distribution function presented for assessing system resilience. It is found that when long-period records are applied in one given direction, the angle of incidence has the most significant effect on seismic resilience, and bridges are most vulnerable when the angle of incidence tends to 0°. The effect of deck radius on seismic resilience became more remarkable as the angle of incidence increased. Additionally, results indicate that the bridge vulnerability in long-period records is more significant than that under short-period records.

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Section: Strong Ground Motion Selectionmentioning

confidence: 99%

Seismic Resilience Assessment of Curved Reinforced Concrete Bridge Piers through Seismic Fragility Curves Considering Short- and Long-Period Earthquakes

Uenaga,

Omidian,

George

et al. 2023

Sustainability

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show abstract

“…On the contrary, many researchers pointed out that long‐duration ground motions may cause severe structural/non‐structural damage to long‐period structures 20–28 . Especially in Japan, long‐duration ground motions caused by big earthquakes may bring great losses to large cities on soft sedimentary basin.…”

Section: Introductionmentioning

confidence: 99%

“…On the contrary, many researchers pointed out that longduration ground motions may cause severe structural/nonstructural damage to long-period structures. [20][21][22][23][24][25][26][27][28] Especially in Japan, long-duration ground motions caused by big earthquakes may bring great losses to large cities on soft sedimentary basin. Therefore, it is necessary to clarify what is effective for improving the resilience of high-rise buildings.…”

Section: Introductionmentioning

confidence: 99%

Resilience evaluation of elastic‐plastic high‐rise buildings under resonant long‐duration ground motion

Akehashi

Takewaki

2022

Japan Architectural Review

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A simple evaluation method of building resilience is proposed, and the resilience of elastic‐plastic high‐rise buildings is evaluated under resonant long‐duration ground motions. The concept of availability is incorporated into the evaluation model of the building resilience, which was proposed in the previous paper. Not only in‐building components but also external factors such as lifelines and redundancy of facility systems are considered in the evaluation model. Based on the evaluation model, the following probabilistic indices are formulated: (1) the expected value of the total recovery time, (2) the expected values of the availability of the structural frame, facilities, and non‐structural components just after an earthquake event, and (3) the maximum likelihood recovery curves (MLRCs) of the structural frame, facilities, and non‐structural components. Numerical examples are presented for evaluating the resilience of elastic‐plastic high‐rise building models under a pseudo‐multi impulse (PMI), which substitutes for resonant long‐duration ground motions. Finally, the influences of the passive viscous dampers, the redundancy of facility systems, and the uncertainty of manpower to repair the components on the building resilience are clarified through the results of numerical examples.

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“…Recently, many researchers focused on the seismic responses of long‐period structures under long‐duration ground motions after the experience of actual ground motions. [ 1–5 ] Since long‐period components of earthquake ground motions propagate far from the epicenter, long‐period structures on relatively soft ground may exhibit resonant responses and experience severe structural/non‐structural damage. There have been several reports on observed long‐period, long‐duration ground motions and damaged structures and lifelines.…”

Section: Introductionmentioning

confidence: 99%

Pseudo‐multi impulse for simulating critical response of elastic–plastic high‐rise buildings under long‐duration, long‐period ground motion

Akehashi

Takewaki

2022

Structural Design Tall Build

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A pseudo-multi impulse (PMI) is proposed as an extension of the ordinary base-input multi impulse substituting a long-duration, long-period ground motion which can often be simulated by a multi-cycle sine wave (MSW). PMI is treated as a multitude of impulsive lateral forces and hardly excites the higher-mode responses of elastic multi-degree-of-freedom (MDOF) models because the undamped fundamental participation vector is adopted as the influence coefficient vector. It is shown that the critical time interval of PMI can be obtained without any repetition. This enables a smart derivation of the critical response. The displacement transfer functions are derived for elastic MDOF models, where two kinds of the influence coefficient vectors are adopted: (1) one at every component (conventional one) and ( 2) the undamped fundamental-mode participation vector. It is demonstrated that the critical PMI can efficiently and accurately evaluate the maximum responses under MSW and the critical input period of MSW for elastic-plastic MDOF models. Furthermore, PMI is extended to treat the critical case for the second eigenmode. Finally, the critical PMI is applied to high-rise buildings for the investigation into the input energy and the cumulative plastic deformation ductility demand.

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An improved defining parameter for long-period ground motions with application of a super-tall building

Cited by 16 publications

References 26 publications

Seismic Resilience Assessment of Curved Reinforced Concrete Bridge Piers through Seismic Fragility Curves Considering Short- and Long-Period Earthquakes

Seismic Resilience Assessment of Curved Reinforced Concrete Bridge Piers through Seismic Fragility Curves Considering Short- and Long-Period Earthquakes

Resilience evaluation of elastic‐plastic high‐rise buildings under resonant long‐duration ground motion

Pseudo‐multi impulse for simulating critical response of elastic–plastic high‐rise buildings under long‐duration, long‐period ground motion

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