Evaluation of Supplementary Constraints on Dispersion of EDPs Using Real Ground Motion Record Sets

Demir, Ahmet; Palancı, Mehmet; Kayhan, Ali Haydar

doi:10.1007/s13369-020-04719-9

Cited by 17 publications

(8 citation statements)

References 27 publications

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“…It is noted that IDA is a set of time history nonlinear dynamic analyses under different numerous records therefore selection of seismic records is an important step to assess the performance of structures probabilistically. Some researchers evaluate the influence of the features, content and number of the seismic excitations on the analysis results [43][44][45][46][47][48][49][50]. In this paper, these records are first scaled according to the peak ground velocity (PGV).…”

Section: Ground Motion Recordsmentioning

confidence: 99%

Probabilistic investigation of the pounding effect in steel moment resisting frames with equal and unequal heights

Sadeghi,

Kazemi,

Razmkhah

et al. 2024

Res. Eng. Struct. Mat.

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In this research, the influence of the pounding phenomenon of two adjacent steel moment resisting frames (SMRFs) with 2 and 5-story with an intermediate ductility is investigated by considering equal and unequal heights under seismic excitations. In this way, two scenarios are applied. The first and second scenarios are related to the pounding of two SMRFs with an equal height (both frames with 2-story) and an unequal height (2-story and 5-story frames), respectively. In the following, at first, sensitivity analysis is conducted by the Monte Carlo simulation (MCS) method. Then, the collapse performance of the studied SMRFs is evaluated by incremental dynamic analysis (IDA), and fragility curves under 14 far-fault records and also, the failure probability is predicted by the Kriging meta-model. The results of sensitivity analysis indicate that the yield strength of cross-sections and dead load were the greatest effect on failure probability computation. Also, in the statistical level of 50%, the collapse probability of SMRFs with an equal height is 17% compared to the SMRFs with an unequal height. Also, the results of the Kriging meta-model show that the failure probability is increased by 65% in an unequal height versus an equal height.

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Section: Ground Motion Recordsmentioning

confidence: 99%

Probabilistic investigation of the pounding effect in steel moment resisting frames with equal and unequal heights

Sadeghi,

Kazemi,

Razmkhah

et al. 2024

Res. Eng. Struct. Mat.

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“…For tunnel sections that utilize damping layers, it is important to select a reasonable thickness for the damping layer to achieve the dual purpose of protecting the tunnel while considering economic feasibility. Additionally, further studies are needed to verify the reliability of the evaluation methods for the effectiveness of the isolation layer under different seismic wave excitations [32,33].…”

Section: Seismic Damage Status Of Tunnel Lining Structurementioning

confidence: 99%

Evaluation of the Damping Layer between the Tunnel Lining and Surrounding Rock via a Shaking Table Test

Wen,

Zhou,

et al. 2023

Sustainability

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This paper primarily investigates the protective effect of the damping layer in tunnel lining structures under dynamic loads. A series of shaking table tests was conducted to investigate the seismic response mechanism of tunnel linings and the influence of surrounding rocks using the Wenchuan earthquake (magnitude 8.0) as a reference. The results show that the effect of the damping layer protection measures is accurate using the efficiency evaluation method for the damping layer under seismic excitation. The lower the excitation acceleration is, the better the effect will be. In addition, the damping coefficient is introduced to optimize the efficiency evaluation method for the damping layer. Among the factors influencing the seismic response of lining structures, the type of surrounding rock has a significant impact while the thickness of the damping layer has a relatively lesser influence. In seismic intensity areas of equal magnitude, an increase in the damping layer thickness leads to a more noticeable effect. In the different seismic intensity areas, the difference in the protection effect with the change in thickness is no longer obvious with the increase in seismic intensity. Moreover, the presence of a damping layer alters the intrinsic vibration characteristics of the tunnel lining structure, creating a space for deformation between the lining and the surrounding rock.

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“…One should be aware that certain response values of a pilotis building supported by DHC columns such as IDRmax, IDRres, and MISFs could be affected by the selection of earthquake records [31,32]. To evaluate maximum drift demands of such buildings within a certain region, soil type, target design spectrum, etc., and, furthermore, to propose a design method for such buildings requires the appropriate selection of records.…”

Section: Maximum Inter-story Shear Forcementioning

confidence: 99%

Nonlinear Dynamic Analysis of Pilotis Structures Supported by Drift-Hardening Concrete Columns

Yuan,

Takeuchi,

Sun

2023

Materials

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Pilotis structures consisting of upper concrete bearing-walls and a soft first story have been well used in residential and office buildings in urban areas to primarily accommodate parking lots. In this research, drift-hardening concrete (DHC) columns developed by the authors are proposed to form the pilotis story with the aims of reducing its excessive residual drift caused by stronger earthquakes than anticipated in current seismic codes, mitigating damage degree, and enhancing resilience of the pilotis story. Nonlinear dynamic analysis was conducted to investigate the dynamic response characteristics of the wall structures supported by DHC columns. To this end, two sample six-story one-bay pilotis structures were designed following the current Japanese seismic design codes and analyzed. One sample structure is supported by ductile concrete (DC) columns, while the other is supported by DHC columns, which have the same dimensions, steel amount, and concrete strength as DC columns. Three representative ground motions were adopted for the nonlinear dynamic analysis. The analytical parameter was the amplitude of peak ground acceleration (PGA), scaled by the peak ground velocity (PGV) ranging between 12.5 cm/s and 100 cm/s with an interval of 12.5 cm/s. The analytical results have revealed that the residual drift of the pilotis story composed of DHC columns could be reduced to nearly zero under selected earthquakes scaled up to PGV = 100 cm/s, owing to not only the inherent self-centering ability of DHC columns but also the shake-down effect, which implies that the use of DHC columns can greatly enhance resilience of pilotis structures under strong earthquake inputs and promote its application in the buildings located in strong earthquake-prone regions. The maximum inter-story shear forces (MISFs) along the building height of the two models are also compared.

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Evaluation of Supplementary Constraints on Dispersion of EDPs Using Real Ground Motion Record Sets

Cited by 17 publications

References 27 publications

Probabilistic investigation of the pounding effect in steel moment resisting frames with equal and unequal heights

Probabilistic investigation of the pounding effect in steel moment resisting frames with equal and unequal heights

Evaluation of the Damping Layer between the Tunnel Lining and Surrounding Rock via a Shaking Table Test

Nonlinear Dynamic Analysis of Pilotis Structures Supported by Drift-Hardening Concrete Columns

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