Article
Engineering, Geological
Xue-You Li, Jian-Hong Wan, Hai-Peng Zhao, Si-Wei Liu
Summary: This paper developed a 3D pile element model that integrates soil properties, computes element tangent stiffness matrices, and utilizes a semi-analytical method and updated Lagrangian approach. Numerical implementation validated the efficiency and accuracy of the proposed model.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2021)
Article
Construction & Building Technology
Wen -Ting Li, Rui Wang, Jian-Min Zhang
Summary: This study aims to analyze the influence of an aboveground structure on a connected underground structure seismic response within an integrated system using nonlinear dynamic finite element simulations. The results reveal the sensitivity of the underground structure's seismic response to the aboveground structure. Generally, the presence of aboveground structure can significantly increase the racking deformation and internal force of underground structure, particularly for the first underground story and for the underground spans directly below the aboveground structure. However, when the input motion is dominated by high frequency content, the aboveground structure can act to reduce the underground structure seismic response.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Engineering, Geological
Cristiano Garbellini, Lyesse Laloui
Summary: This study investigates the problem of energy piles under constant axial load and uniform temperature variation. Equations based on elastic theory and load-transfer approach are described, with a focus on the effect of reinforced concrete non-linearity. The study shows that the structure performance is strongly influenced by post-cracking concrete behavior, but piles can accommodate thermally imposed strains.
Article
Engineering, Geological
Mohammad Shamsi, Mohammad Javad Shabani, Amir Hossein Vakili
Summary: This study uses numerical simulations to evaluate the seismic response of buildings adjacent to slopes, and discovers that topography-structure-soil-structure interaction has significant effects on the displacements and shear forces in the lower stories. Additionally, the distance between adjacent buildings also influences the seismic response.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Construction & Building Technology
Liguo Jin, Liting Du, Wen Zhou, Su Chen, Zhenghua Zhou, Bengang Zhou
Summary: This paper focuses on the research of an actual station in Nanjing Metro Line 2. Two-dimensional (2D) and three-dimensional (3D) overall time-domain nonlinear finite element models were established to study the influence of the 3D spatial effects of the underground structure on the seismic response. The results show that the 2D model cannot accurately reflect the deformation characteristics of the 3D station structure, and the proposed conversion coefficients can effectively convert the 2D model results to approximate the 3D model results.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Engineering, Geological
Basuony El-Garhy, Ahmed Abdel Galel
Summary: This paper presents a new method for the nonlinear analysis of rafts resting on multilayered heterogeneous soils using the Vlasov model. The finite-element and the finite-difference methods are employed to solve the governing differential equations for the flexure of the raft and the displacement within the supporting soil mass, respectively. The method is validated by field measurements and is in good agreement with nonlinear three-dimensional finite-element analysis and other existing analysis methods.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Chemistry, Multidisciplinary
Jishuai Wang, Jun Yang
Summary: This study investigates the impact of dynamic soil-structure interaction on the seismic demand of a reinforced concrete frame. Through a numerical model and parametric analysis, it was found that factors such as pile length and diameter significantly influence the base shear in the soil-structure interaction effect.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Marine
Xiaohua Bao, Shidong Wu, Zhipeng Liu, Dong Su, Xiangsheng Chen
Summary: An interface contact model is proposed to study the nonlinear behavior of soil-pile interactions during soil liquefaction in earthquakes. The model considers the separation between the soil and the pile using joint elements that exhibit different deformation characteristics in the elastic and plastic stages. A fully coupled 3-D soil-water dynamic finite element-finite difference analysis is performed, considering different ground motions. The results show that the soil-pile interface significantly affects the pile response, especially in strong ground motions. Additionally, considering the volume effect of the pile is necessary for both small and strong ground motions. The potential soil-pile separation is crucial for understanding the interaction mechanism and quantifying the pile response in earthquakes.
Article
Engineering, Geological
Guillermo M. alamo, Luis A. Padron, Juan J. Aznarez, Orlando Maeso
Summary: This paper introduces a three-dimensional linear numerical model for dynamic and seismic analysis of pile-supported structures, considering the interaction between structure, piles, soil, and seismic waves. By using advanced Green's functions to simulate the dynamic behavior of layered soils, the model simplifies representation and data preparation, allowing for complex soil profiles and problems with large numbers of elements. The seismic excitation is implemented through incident planar body waves, and the system response is evaluated in the frequency domain before obtaining seismic results in the time domain using the Fast Fourier Transform. An application example is presented to demonstrate the capabilities of the model, exploring the influence of soil profile and angle of incidence on variables of interest in earthquake engineering.
BULLETIN OF EARTHQUAKE ENGINEERING
(2022)
Article
Construction & Building Technology
Michael Rene Mix Visintainer, Guilherme Wienandts Alminhana, Alexandre Luis Braun
Summary: The dynamic effects of wind action and soil-foundation interaction on the CAARC tall building model are numerically evaluated in this study. A numerical model is developed using a partitioned coupling scheme for fluid-structure-soil interaction. The results show that soil-structure interaction significantly influences the building response to wind loading and the effects of aeroelastic instability can be reduced with soil support.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Geological
Priyanka Bhartiya, Dipanjan Basu, Tanusree Chakraborty
Summary: A hand-calculation method has been developed using three-dimensional finite-element analysis to estimate the nonlinear load-settlement response of piled raft foundations embedded in sandy soils. Different types and sizes of piled raft foundations in various sands were considered in the study to develop equations for settlement estimation, which can be used for quick initial estimation by practitioners in design calculations.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2021)
Article
Multidisciplinary Sciences
Naci Caglar, Sedat Sert, Ahmet Hamdi Serdar
Summary: The study investigates the effects of the basement storey on the seismic behavior of RC buildings constructed on near-surface alluvial soft soil. Numerical models indicate that as the height of RC buildings increases, those without a basement storey experience detrimental effects on seismic response.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Geological
Stephen K. Suryasentana, Harvey J. Burd, Byron W. Byrne, Avi Shonberg
Summary: This paper presents a thermodynamically consistent Winkler model called OxCaisson, which can provide computationally efficient estimates of foundation stiffness for caissons installed in soil. The model is suitable for design applications where speed and accuracy are essential, such as fatigue assessments of offshore wind farm structures.
Article
Construction & Building Technology
Ahmed Marwan, Vojtech Ernst Gall, Abdullah Alsahly, Guenther Meschke
Summary: Tunnel linings are designed to fulfill basic structural, serviceability and durability requirements permanently. In this study, a technique for modeling the segment-wise installation of tunnel linings in a 3D tunnel advance simulation is proposed to better predict time-dependent structural forces. The explicit modeling of segmental lining joints within a 3D structural model diverges significantly from conventional methods, showing the importance of accurate modeling techniques in the design process.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Construction & Building Technology
Lei Xu
Summary: In order to evaluate the ground vibration caused by metro tunnel operations, it is necessary to extend the near-field vibration of train-track-tunnel to the far-field vibration of train-track-tunnel-soil through numerical analysis. This study proposes an isoparametric element permutation method that integrates triangular prismatic elements and spatial isoperimetric elements to model the tunnel-soil system effectively. The tunnel and soil subsystems are coupled using spring-dashpot elements. The effectiveness of this model is validated through comparison with measurements on site.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Construction & Building Technology
Jonathan P. Rivera, Andrew S. Whittaker
ACI STRUCTURAL JOURNAL
(2019)
Article
Construction & Building Technology
Siamak Epackachi, Nikhil Sharma, Andrew Whittaker, Ronald O. Hamburger, Ayse Hortacsu
JOURNAL OF STRUCTURAL ENGINEERING
(2019)
Article
Construction & Building Technology
Alexandros Nikellis, Kallol Sett, Andrew S. Whittaker
JOURNAL OF STRUCTURAL ENGINEERING
(2019)
Article
Construction & Building Technology
Alok A. Deshpande, Andrew S. Whittaker
ACI STRUCTURAL JOURNAL
(2019)
Article
Construction & Building Technology
Jonathan P. Rivera, Andrew S. Whittaker
JOURNAL OF STRUCTURAL ENGINEERING
(2019)
Article
Engineering, Mechanical
Sina Sinaie, Tuan Duc Ngo, Alireza Kashani, Andrew S. Whittaker
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2019)
Article
Engineering, Civil
Chandrakanth Bolisetti, Andrew S. Whittaker
ENGINEERING STRUCTURES
(2020)
Article
Nuclear Science & Technology
Swetha Veeraraghavan, Chandrakanth Bolisetti, Andrew Slaughter, Justin Coleman, Somayajulu Dhulipala, William Hoffman, Kyungtae Kim, Efe Kurt, Robert Spears, Lynn Munday
Summary: This paper introduces an open-source finite-element software, MASTODON, which implements state-of-the-art seismic analysis and risk assessment tools in a quality-controlled environment. MASTODON is built on the MOOSE framework, capable of fault rupture, wave propagation, site response analysis, and more.
NUCLEAR TECHNOLOGY
(2021)
Article
Nuclear Science & Technology
Somayajulu L. N. Dhulipala, Chandrakanth Bolisetti, Richard Yorg, Philip Hashimoto, Justin L. Coleman, Mark Cox
Summary: This paper focuses on the Seismic Hazard Periodic Re-Evaluation Methodology (SHPRM) developed by INL, specifically addressing seismic risk assessment and reevaluation. It demonstrates the risk objectives criterion for a generic nuclear facility (GNF) and calculates the collapse risk using fault tree analysis and in-house seismic analysis software. The results show a decrease in seismic risk after reevaluation, meeting the risk objectives set by ASCE/SEI 43-05.
NUCLEAR TECHNOLOGY
(2021)
Article
Nuclear Science & Technology
Chandrakanth Bolisetti, Justin Coleman, William Hoffman, Andrew Whittaker
Summary: The paper presents a cost- and risk-based seismic design optimization method for nuclear power plants safety systems, aiming to reduce capital costs and meet safety goals. The optimization process significantly reduces capital costs while automatically prioritizing the safety of components that contribute most to the risk of the safety system.
NUCLEAR TECHNOLOGY
(2021)
Editorial Material
Nuclear Science & Technology
Chandrakanth Bolisetti
NUCLEAR TECHNOLOGY
(2021)
Article
Engineering, Civil
Somayajulu L. N. Dhulipala, Chandrakanth Bolisetti, Lynn B. Munday, William M. Hoffman, Ching-Ching Yu, Faizan Ul Haq Mir, Fande Kong, Alexander D. Lindsay, Andrew S. Whittaker
Summary: In this paper, the acoustic fluid-structure interaction (FSI) formulation is implemented in the open-source Multiphysics Object-Oriented Simulation Environment (MOOSE) and verified and validated using analytical solutions, code-to-code verification, and experimental data. The results show that the MOOSE acoustic FSI model predicts hydrodynamic pressures and support reactions accurately, except for cases involving significant convective response. The model is particularly efficient for small amplitude inputs and has faster run times compared to the ALE simulations in LS-DYNA.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Somayajulu L. N. Dhulipala, Michael D. Shields, Benjamin W. Spencer, Chandrakanth Bolisetti, Andrew E. Slaughter, Vincent M. Laboure, Promit Chakroborty
Summary: The article introduces an active learning framework emphasizing the efficient estimation of rare events using multifidelity modeling. By adaptively deciding the number of required HF simulations based on problem type and complexity, as well as desired result accuracy, the framework achieves greater efficiency and accuracy.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Industrial
Somayajulu L. N. Dhulipala, Michael D. Shields, Promit Chakroborty, Wen Jiang, Benjamin W. Spencer, Jason D. Hales, Vincent M. Laboure, Zachary M. Prince, Chandrakanth Bolisetti, Yifeng Che
Summary: In this study, coupled active learning, multifidelity modeling, and subset simulation were used to estimate the failure probabilities of TRISO fuels. With multifidelity modeling, information fusion from two low-fidelity models replaced expensive high-fidelity model evaluations. For the 1D TRISO models, different multifidelity modeling strategies were compared, and the strategy employing information fusion from two low-fidelity models called the high-fidelity model least often. For the 2D TRISO model, a physics-based strategy consistently required the fewest calls to the high-fidelity model, while a data-driven strategy had a lower overall simulation time due to instantaneous DNN predictions.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2022)
Article
Engineering, Geological
Raj Banerjee, Srijit Bandyopadhyay, Tarvinder Singh, Aniruddha Sengupta, G. R. Reddy, Justin Coleman, Chandrakanth Bolisetti
Summary: This study develops a 2D equivalent linear model and a nonlinear model for simulating dynamic soil-structure interaction, and validates them through experimental results and an open-source code. The study finds that the loading-unloading rules and the selection of small strain damping values have a significant influence on the high-frequency content of the ground response.
GEOMECHANICS AND GEOENGINEERING-AN INTERNATIONAL JOURNAL
(2022)
Article
Engineering, Geological
Shaohui Liu, Lizhong Jiang, Wangbao Zhou, Jian Yu
Summary: This study evaluates the post-earthquake damage to track-bridge systems by conducting nonlinear time history analysis on a CRTS II ballastless track simply-supported beam system subjected to transverse earthquake loading. It explores the characteristics of residual displacement and stiffness degradation of the track-bridge system under transverse earthquakes. The research investigates the effect of earthquake-induced stiffness degradation on high-speed trains and proposes a reconstruction method for earthquake-induced dynamic irregularity characteristic curve considering probability guarantee rates. The results indicate that earthquake-induced dynamic irregularity can effectively quantify the running performance of high-speed trains under earthquake-induced stiffness degradation conditions.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Rui Zhang, Xiangqian Sheng, Wenliang Fan
Summary: This study introduces a novel approach for the probabilistic assessment of seismic earth pressure against nonlinear backfills. Nonlinear upper bound analysis is used to obtain the seismic earth pressure through optimization procedure, and probability analysis of nonlinear backfill properties is considered by combining adaptive dimension decomposition with the direct integral method.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Qiangqiang Sun, Yu Xue, Menghao Hou
Summary: This study investigated the use of Tire-derived aggregate (TDA) as backfill material for geotechnical seismic isolation in utility tunnels. Nonlinear numerical analyses were conducted, and the results showed that TDA backfill was an excellent alternative for risk mitigation during strong earthquakes, significantly reducing deformation and forces. The proposed system could potentially save costs compared to expensive seismic mitigation measures.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Yan-Guo Zhou, Dong-Chao Zhang, Kai Liu, Yun-Min Chen
Summary: This study investigated the large deformations caused by liquefaction in sloping ground and the methods for evaluation and mitigation. Soil element tests and centrifuge model tests were conducted to study the relationship between residual strain and Post-liquefaction Deformation Potential (PLDP). The tests showed that the developments of residual strain were controlled by PLDP, which is correlated with the maximum cyclic shear strain. The applicability of PLDP was verified in model tests, and the mitigation mechanisms of densification and drainage induced by stone columns were observed.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jiajin Zhao, Zhehao Zhu, Dexuan Zhang, Hao Wang, Xi Li
Summary: This paper studies the fabric properties during sand liquefaction using 3D constant-volume cyclic triaxial DEM tests. The results show good consistency with experimental data. The evolution of fabric characteristics is assessed using the coordination number and mechanical coordination number. The second-order contact normal fabric tensor is introduced to analyze complex inter-particle contacts and the shear strain is used as a bridge to describe the evolution of coordination number and anisotropy degree.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jinqiang Li, Zilan Zhong, Shurui Wang, Kaiming Bi, Hong Hao
Summary: The corrosion-protection liner technology improves the seismic performance of water supply pipelines and reduces the failure probability under earthquake excitations.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Abdellah Cherif Taiba, Youcef Mahmoudi, Mostefa Belkhatir
Summary: This article provides a comprehensive analysis of Liu et al.'s (2023) published paper in the Soil Dynamics and Earthquake Engineering journal, which examines the impact of particle shape on the wave velocity of sand. By enhancing the content integrity, this article serves as a valuable discussion piece for readers interested in this research topic.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Weijian Zhong, Binbin Li, Yanhui Liu, Ping Tan, Fulin Zhou
Summary: In this paper, the Flexible Limit Protective Device (FLPD) was improved to a Flexible Energy Dissipating Device (FEDD) to better control the seismic response of base-isolated structures. Experimental investigation and numerical simulation were conducted to study the compression behavior and optimize the design of FEDDs. The results showed that FEDDs with optimal parameters effectively reduced isolator displacements and kept the inter-story drift angle within a safe range during earthquakes.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Xinhua Xue, Xiaojie Yuan, Li Tao
Summary: In this study, gene expression programming (GEP) was used to establish the relationship between the capacity energy required to trigger sand liquefaction and several major parameters. The GEP model showed higher accuracy and better performance compared to existing models, as confirmed by experimental data.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Xiao-ling Zhang, Hao Lan, Xian-hui Zhao, Cheng-shun Xu, Ke-min Jia
Summary: The study investigates the reinforcement principle of inclined liquefiable site using concrete pile and gravel pile methods. The results show that concrete piles have a better reinforcement effect on inclined liquefiable site compared to gravel piles, and increasing the diameter of gravel piles greatly improves the reinforcement effect. The pile group reinforcement model is more effective in reducing lateral displacement of the site soil compared to the single pile reinforcement model.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jinxin Sun, Haoyu Sun, Mengmeng Lu, Bolin Han
Summary: The implementation of stone columns is an effective way to improve the stability of liquefiable soil. However, existing mathematical models often neglect vertical seepage within the soil, leading to calculation errors. This study proposes a new mathematical model that considers both radial and vertical seepage, and conducts a parameter analysis to investigate the effects of column spacing, cyclic stress ratio, and consolidation parameters on excess pore water pressure.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jonathan F. Hubler, James P. Hanley, Andrew C. Stolte, Liam Wotherspoon, Kyle M. Rollins
Summary: This study performed blast liquefaction tests in an area that experienced extensive liquefaction. It used multi-channel analysis of surface waves (MASW) testing to evaluate changes in shear wave velocity (VS) before and after blasting. The study found that array length has an impact on the immediate changes in VS following blasting, but these changes decrease at 24 hours post-blast.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Lowell Tan Cabangon, Gaetano Elia, Mohamed Rouainia, Suraparb Keawsawasvong, Teraphan Ornthammarath
Summary: The impact of far-field earthquakes on underground structures, especially tunnels, has been relatively less explored compared to near-field earthquakes. However, the study found that far-field earthquakes can generate forces in tunnel lining that are equally destructive as those induced by near-field motions, especially when they contain long-period waves. The amplification of these ground motions in soft natural clays, common in Bangkok, can lead to significant soil displacements and shear strains.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jinjun Hu, Longbing Ding, Xutong Zhou, Mingji Liu, Jingyang Tan
Summary: Offshore near-fault ground motions during the 2016 OffMie Mw6.0 earthquake in the Nankai Trough of Japan were studied using data from the DONET1 seafloor seismic network. The results show that offshore spectral acceleration and peak ground velocity are higher than onshore values. Analysis of pulse-like ground motions reveals differences in amplitude, frequency content, and energy between offshore and onshore motions. These findings have implications for seismic design of offshore engineering structures.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Radu Popescu, Pradipta Chakrabortty
Summary: The natural spatial variability of soil properties affects the mechanical response of geotechnical structures and can deviate failure surfaces. For soil liquefaction induced by seismic activity, it has been found that greater excess pore water pressure is generated in soils with small-scale variability. This paper provides an explanation based on centrifuge experiments and numerical simulations, showing that partial drainage during earthquakes may trigger softening of dilative soils.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)