Article
Engineering, Geological
Jie Zhang, Tianpeng Wang, Shihao Xiao, Lei Gao
Summary: This paper discusses the validity of the depth consistency assumption in Chinese seismic design code methods and proposes a new method based on the concept of depth consistency that can be used internationally and can be more accurate than the current Chinese seismic design code methods in some cases.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Geological
Zheng Guan, Yu Wang
Summary: One of the major risks during an earthquake is liquefaction in loose saturated sand deposits. In situ tests like standard penetration tests (SPTs) are commonly used to estimate liquefaction-induced deformation, but they provide limited information. The proposed method in this study aims to characterize the spatial variation of ground deformation using limited SPTs data.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2022)
Article
Engineering, Geological
Jian-Yu Meng, Da-Gang Lu, Bao-Hua Shan
Summary: Seismic liquefaction is a complex and uncertain problem affected by various factors. The analysis and evaluation of earthquake-induced soil liquefaction and the improvement of seismic stability have made significant progress. However, the fragility analysis for seismic liquefaction of sites has not received enough attention. This paper proposes the concept of seismic liquefaction fragility for building sites and provides an analysis method. By convolving with liquefaction triggering and hazard analysis, the liquefaction fragility function can be an efficient tool for seismic liquefaction risk analysis.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Zhijian Qiu, Zhiquan Yu, Lei Su, Athul Prabhakaran, Ahmed Elgamal, Xiang Wang
Summary: This study proposes a three-dimensional nonlinear finite element framework to evaluate the damage exceedance probability of bridge foundations caused by soil liquefaction at different earthquake intensities. An optimal intensity measure is identified to reduce uncertainty in the probabilistic seismic demand model. The study also explores the potential of geotechnical and structural mitigation measures to reduce the vulnerability of the bridge structure.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Steven R. Saye, Scott M. Olson, Kevin W. Franke
Summary: This paper introduces a new method to assess soil liquefaction susceptibility and triggering by using the Delta(Q) common-origin approach to improve current engineering practices. This method does not require estimating fines content or converting CPT tip resistance values, but provides unique estimates of liquefaction resistance based on compressibility.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2021)
Article
Engineering, Civil
Jilei Hu, Bin Xiong, Zheng Zhang, Jing Wang
Summary: This study proposes a continuous Bayesian network regression model for predicting seismic liquefaction-induced settlement. By combining a hill-climbing algorithm and domain knowledge, the structure of the model is constructed, and the conditional linear Gaussian approach is used to learn the conditional probability distributions of parameters. Compared with other models, this model has better prediction accuracy and advantages.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2023)
Article
Engineering, Geological
Karthy Natarajan, Gopal S. P. Madabhushi
Summary: This research investigates the behavior of an offshore wind turbine jacket structure subjected to earthquake loading. The results show that the liquefaction effects under strong seismic loading can cause severe settlements and rotations in the offshore wind turbine structure, but these can be restricted by placing the pile cap in a lower position.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Geological
Ling-Yu Xu, Cheng-Xiang Song, Wei-Yun Chen, Fei Cai, Yong-Yi Li, Guo-Xing Chen
Summary: This study investigates the effects of earthquakes on pile settlement in saturated sand deposits using finite element analysis and a dynamic model, indicating that liquefaction induced by distant earthquakes is more severe than by nearby earthquakes, and proposes a solution.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Zeval Aytas, Nuray Alpaslan, Ferhat Ozcep
Summary: Soil liquefaction is a major failure mode caused by dynamic loads such as earthquakes. This study evaluates the liquefaction potential of soils in the Batman settlement zone in Turkey. The results show that soil and earthquake parameters have a significant impact on soil liquefaction, and the analysis using these parameters provides more reliable results. Additionally, the high liquefaction risk areas are associated with significant settlement, indicating the potential for high settlement in the region.
Article
Engineering, Geological
S. Mohammad Sadegh Sahraeian, Mohammad Ali Masoumi, Mohammad Amir Najafgholipour, Ali Shafiee, Bishnu Pandey
Summary: The increasing use of renewable energy sources is due to the future instability and environmental issues associated with fossil fuels. Offshore wind turbines have become a major renewable energy source, but their foundation design faces challenges in seismic prone areas. This study examines the seismic behavior of a 5 MW offshore wind turbine on a monopile foundation in liquefiable soil under near-field and far-field earthquakes. The results show that near-field earthquakes have a more critical seismic response despite their shorter duration and smaller arias intensity, highlighting the effect of near-field pulses and bidirectional earthquake loading on the monopile's seismic response.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Nima Mojtahedzadeh, Raj Siddharthan
Summary: The study proposes a new method for estimating the one-dimensional settlement histories induced by earthquakes, using an incremental volumetric strain model and effective stress-based response analysis, along with a simple porewater pressure generation model in DEEPSOIL.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Geological
Qiang Wu, Dian-Qing Li, Yong Liu, Wenqi Du
Summary: This study investigates the impact of near-fault pulse-like ground motions on the seismic performance of earth dams susceptible to liquefaction-induced damage. The results show that pulse-containing ground motions are more likely to trigger liquefaction and lead to larger lateral displacements and settlements post-liquefaction compared to ordinary motions. Additionally, the lateral displacements and settlements for pulse-like motions are strongly correlated to the duration and cumulative-energy parameters of the ground motions.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Mechanical
Zhaoxian Dong, Zhiguo Sun, Suiwen Wu, Fan Tong, Dongsheng Wang
Summary: Soil liquefaction has a significant impact on the seismic failure of the bridge-ground system, increasing the risk of bridge failure and changing the failure mode.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Geological
Jawad Fayaz, Sanaz Rezaeian, Farzin Zareian
Summary: This study focuses on validating simulated ground motions for bridge engineering applications in southern California. The analysis shows that CyberShake simulates shorter return period motions similar to empirical data, but discrepancies exist for longer return periods. Validation efforts should include comparisons of the relations between IM levels and EDPs.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
Bo Li, Zhen Cai, Zhongdong Duan
Summary: In seismic risk analysis, selecting hazard-consistent ground motions is a key step. Current methods have limitations, and this study proposes a novel method that utilizes a scenario earthquake set and simulation of target response spectra. The selected ground motions using this method show very good consistency with the site seismic hazards.
