Empirical porewater pressure generation model parameters in 1-D seismic site response analysis

Mei, Xuan; Olson, Scott M.; Hashash, Youssef M. A.

doi:10.1016/j.soildyn.2018.07.011

Cited by 19 publications

(5 citation statements)

References 6 publications

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“…However, it was not selected because this method is challenging to use. A cyclic shear test is required for each sand to calibrate the damage parameter at the initiation of liquefaction (D𝑟 𝑢 ) and the calibration parameter (α) [18]. The parameters used in the Vucetic/Dobry PWP model are considered easy to apply to sandy soils.…”

Section: Nonlinear Site Response Analysismentioning

confidence: 99%

“…The parameters used in the Vucetic/Dobry PWP model are considered easy to apply to sandy soils. As found in research by May et al [18] explained that Vucetic / Dobry PWP model [16] developed a unique relationship between 𝑟 𝑢 , cyclic shear strain amplitude (ϒc), and multiple loading cycles (fNc). This relationship is the origin of the 𝑟 𝑢 calculation equation, as shown in Equation 1.…”

Section: Nonlinear Site Response Analysismentioning

confidence: 99%

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Correlation of excess pore water pressure ratio on flow liquefaction phenomenon in Sibalaya – Central Sulawesi Province

Oktarina,

Fikri,

Istiarto

2023

E3S Web Conf.

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On September 28, 2018, liquefaction in Sibalaya damaged irrigation canals and hit 51.2 hectares fields and roads. This phenomenon was triggered by an earthquake of magnitude 7.5 that shook Sigi Regency, Central Sulawesi Province. As an increase in soil pore water pressure is one of the causes of liquefaction, the pore water pressure ratio (ru) at the study site was analyzed. Then, this figure is used as a point of reference to determine the liquefaction potential. Standard Penetration Test (SPT) data and laboratory tests from four boreholes resulting from soil investigations in 2021 with a maximum depth of 20 meters were utilized in this study, along with microtremor data down to the depth of bedrock from test results in 2023. Based on the data, the liquefaction potential was assessed using the one-dimensional nonlinear site response approach, the GQ/H + PWP model, and the DEEPSOIL V.7 program. At multiple layers of boreholes, ru is more than or equal to 0.8, indicating that the Sibalaya liquefaction flow area is still susceptible to liquefaction.

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Section: Nonlinear Site Response Analysismentioning

confidence: 99%

Section: Nonlinear Site Response Analysismentioning

confidence: 99%

Correlation of excess pore water pressure ratio on flow liquefaction phenomenon in Sibalaya – Central Sulawesi Province

Oktarina,

Fikri,

Istiarto

2023

E3S Web Conf.

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“…Similarly, 𝑠 was assigned to be 1.0 based on [28]. 𝑝 and 𝛾 𝑡𝑣𝑝 was assumed as 1.15 and 0.05%, respectively.…”

Section: Deepsoilmentioning

confidence: 99%

Numerical assessment of the performance of different constitutive models used to predict liquefiable soil behavior

Demir

2021

International Advanced Researches and Engineering Journal

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Liquefaction has caused severe damages to structures such as excessive settlements, tilting, lateral spreading etc., all over the world during many past earthquakes. Hence, the efficient prediction of liquefiable soil behavior is crucial for liquefaction-induced hazard evaluation of existing structures and the design of new structures in seismically active regions. In this study, a series of nonlinear effective stress analyses are carried out using the DeepSoil and OpenSees opensource software with Modified Kondner–Zelasko (MKZ) and Pressure Dependent Multi Yield02 (PDMY02) constitutive models to evaluate their capabilities in terms of predicting liquefiable soil behavior. The performance of the models has been evaluated by comparing the results between the numerical predictions and a centrifuge study from literature in terms of excess pore water pressures, acceleration-time histories, spectral accelerations, lateral displacements and maximum profile responses at specific depths. The results clearly illustrate that the excess pore water pressure predictions from nonlinear analyses are reasonably close to centrifuge measurements, but the accelerations and lateral displacements are slightly different. It is also observed that dissimilarities in the predictions of the numerical simulations are more obvious for OpenSees simulations with respect to DeepSoil ones.

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“…Thus, the VD and PA models are adopted in this study.The strain-based VD model developed byVucetic (1986) has been widely used in practice. Model parameters are selected according to the empirical correlations(Mei et al, 2018) based on an extensive database of 92 cyclic simple shear and triaxial tests. The required information of Dr and coe cient of uniformity (Cu) are converted from SPT-N(Idriss and Boulanger, 2008) and obtained from laboratory tests, respectively.…”

mentioning

confidence: 99%

“…The required information of Dr and coe cient of uniformity (Cu) are converted from SPT-N(Idriss and Boulanger, 2008) and obtained from laboratory tests, respectively. This study followed the procedure proposed byPark et al (2015) andMei et al (2018) to select the input parameters of the PA model. Similarly, relative density is the most important input information estimated with SPT blowcounts(Idriss and Boulanger, 2008).…”

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confidence: 99%

Numerical study on the effect of near-fault pulse motion on soil liquefaction potential

Tsai,

Li,

Wang

2023

Preprint

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Near-fault (NF) pulse-like ground motions have a significant impact on the performance of structures, but their effects on soil liquefaction potential have been relatively understudied. This paper uses 1D effective stress site response analysis capable of modeling porewater pressure (PWP) generation to investigate the seismic site response under NF and general ground motions. The aim is to assess the effects of NF motions on soil liquefaction by considering different soil models and PWP generation models. The results show that NF ground motions generally induce larger ground responses in terms of PWP generation, especially when the durations of the motions are short. This is due to the higher cumulative absolute velocity associated with NF ground motions compared with general ground motions due to a high-velocity pulse under the same peak ground acceleration. However, this effect diminishes as the duration of motion increases. To avoid underestimating seismic demand, especially for small to moderate earthquakes, a preliminary magnitude scale factor modified for the NF effect is suggested for use in conventional soil liquefaction triggering analysis.

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Empirical porewater pressure generation model parameters in 1-D seismic site response analysis

Cited by 19 publications

References 6 publications

Correlation of excess pore water pressure ratio on flow liquefaction phenomenon in Sibalaya – Central Sulawesi Province

Correlation of excess pore water pressure ratio on flow liquefaction phenomenon in Sibalaya – Central Sulawesi Province

Numerical assessment of the performance of different constitutive models used to predict liquefiable soil behavior

Numerical study on the effect of near-fault pulse motion on soil liquefaction potential

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