Article
Engineering, Civil
Guoxing Chen, Yanzhen Wang, Dingfeng Zhao, Kai Zhao, Jun Yang
Summary: A generic effective stress method is proposed in this paper for nonlinear site response analyses in different dimensions. The method can accurately capture strain reversals and simulate the behavior of sand specimens under uniform cyclic loadings. Comparisons with experimental results and simulations of underground liquefied sites demonstrate the accuracy and reliability of the new method.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Article
Engineering, Geological
Rui Sun, Xiaoming Yuan
Summary: This paper proposes a Holistic Equivalent Linear (EQL-H) method for site response analysis under strong nonlinearity, which shows significant improvement on site classes D and E compared to the traditional Equivalent Linear (EQL) method and existing fully nonlinear (NL) method. The mean relative error of the predicted PGA by the EQL-H method on different site classes under ground shaking intensities less than 1.0 g is within +/- 20%.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
Noorollah Majidi, Hossein Tajmir Riahi, Sayed Mahdi Zandi
Summary: This paper uses wavelet transform to reduce the cost of site response analysis calculations for different soil profiles in Isfahan city, and finds that the second level of decomposition may be the last reliable filter, with a maximum error of 8% in predicting amplification factors. Additionally, wavelet transform can reduce the cost of nonlinear dynamic analysis calculations for structures by 50% with a 5% error.
Article
Engineering, Geological
Romain Meite, Liam Wotherspoon, Russell Green
Summary: Remedial ground densification techniques are widely used to mitigate geotechnical hazards and reduce potential damage to structures by modifying soil conditions and seismic site response characteristics. The study shows that ground motions in densified sites have a modified frequency content, with PSAs generally reduced between 5 and 10 Hz, but the level of de-amplification decreases with increasing depth of ground densification.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Civil
Ssu-Chieh Chen, Chi-Chin Tsai, Duhee Park
Summary: Frequency-dependent equivalent linear (FD-EQL) site response analysis methods, developed as potential substitutes for the EQL procedure to better simulate the nonlinear soil response, have been reported to overpredict the high-frequency wave propagation. Modified procedures proposed to overcome this limitation have demonstrated to improve the fits with the nonlinear analysis results. The method has not yet been applied to perform a deconvolution analysis, where a conventional EQL analysis often fails to converge or provide reliable estimate.
JOURNAL OF EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Environmental
Ebru Civelekler, Volkan D. Okur, Kamil B. Afacan
Summary: Local soil characteristics play a crucial role in determining soil-structure interaction and the behavior of superstructures under seismic loads. The study used vertical array data to investigate the dynamic behavior of local site effects on ground response. Analysis revealed that local soil properties significantly influence ground response, with spectral behavior of the data differing from building code requirements.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Construction & Building Technology
Kunpeng Guo, Qingshan Yang, Yi Hui, Wenshan Shan, Francesca Lupi, Shuai Huang, Weicheng Hu
Summary: This study aims to clarify the application scope of different equivalent linear techniques for evaluating the across-wind response of tall flexible structures. The results show that the harmonic balance technique and statistical linearization technique can calculate acceptable root-mean-squared response, but the statistical linearization technique is not satisfactory especially for structures with lower damping and near the vortex lock-in wind speed. Moreover, neither technique can accurately predict the peak response.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Geological
Yusuf Guzel
Summary: This research investigated the importance of stiffness profile selection in site response analysis. The results showed that different stiffness profile approaches had minimal impact on the nonlinea response predictions, particularly for input motions with a PGA greater than or equal to 0.05 g. However, the stiffness profile selection had a significant influence on the spectral acceleration predictions in the equivalent linear site response analysis.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Marco Pizzoli, Francesco Saltari, Franco Mastroddi
Summary: This paper investigates the effects of sloshing dynamics on the aeroelastic stability and response of a flying wing structure using reduced-order models. The results show that linear sloshing dynamics can change the stability margin and have significant effects on rigid body dynamics, while vertical sloshing acts as a nonlinear damper.
APPLIED SCIENCES-BASEL
(2022)
Article
Geosciences, Multidisciplinary
Bikram Bhusal, Muhammad Aaqib, Satish Paudel, Hari Ram Parajuli
Summary: This study aims to estimate the seismic requirement for the monumental structure, Dharahara, in Kathmandu, Nepal. A probabilistic seismic hazard analysis was conducted to develop the elastic response spectrum. Both one-dimensional equivalent linear and non-linear ground response analyses were performed, considering the presence of soft soil in the region. Comparisons with existing seismic codes showed that the design response spectra fall within the range of similar soil classes.
GEOMATICS NATURAL HAZARDS & RISK
(2022)
Article
Engineering, Civil
Eduardo A. W. de Menezes, Tales V. Lisboa, Rogerio J. Marczak
Summary: Cables and wire ropes are structural components designed for high axial strength and relatively low torsion and flexure stiffness. A new finite element is designed and implemented to incorporate the behavior of a 3D cable modeled using solid elements into a 1D beam element. The proposed equivalent element shows good accuracy in strain energy, stiffness, and dynamic behavior compared to the cable modeled with solid elements.
ENGINEERING STRUCTURES
(2023)
Article
Environmental Sciences
Ravindra K. Gupta, Mohit Agrawal, Rashid Shams, S. K. Pal
Summary: We conducted one dimensional equivalent linear site response analysis on 11 soil profiles in Dhanbad city. Shear wave velocity models obtained from destructive and non-destructive surveys were used to examine the impact of subsoil on earthquakes at the ground surface. The results revealed the composition of alluvium deposits in Dhanbad city, such as silty sand, sandy clay, silt + sand, and sand + clay mixture. The findings provide valuable insights for Indian government agencies to mitigate earthquake effects and build a resilient society.
ENVIRONMENTAL EARTH SCIENCES
(2023)
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
Paola Bordoni, Stefano Gori, Aybige Akinci, Francesco Visini, Sara Sgobba, Francesca Pacor, Fabrizio Cara, Stefano Pampanin, Giuliano Milana, Carlo Doglioni
Summary: This paper presents the ground response analyses of an industrial facility planned in an area located on an active normal fault system called the Mt. Morrone Fault system (MMF). The seismic input for the dynamic numerical analyses was assessed using an interdisciplinary and non-standard approach, incorporating geological, seismological, geotechnical, and engineering contributions. Scenario-based and probabilistic seismic hazard analyses were implemented, and nonlinear numerical simulations of seismic wave propagation were conducted. The results indicate that a scenario-based methodology can better capture the shaking effect in near-field conditions, providing a more robust approach for design and assessment of buildings.
ENGINEERING GEOLOGY
(2023)
Article
Construction & Building Technology
Gabriele Guerrini, Stylianos Kallioras, Stefano Bracchi, Francesco Graziotti, Andrea Penna
Summary: This paper discusses different formulations for calculating earthquake-induced displacement demands to be associated with nonlinear static analysis procedures for the assessment of masonry structures. Various methods are evaluated and a new improved approach is proposed to address the limitations of existing methods.
Article
Engineering, Civil
Sean K. Ahdi, Dong Youp Kwak, Timothy D. Ancheta, Victor Contreras, Tadahiro Kishida, Annie O. Kwok, Silvia Mazzoni, Francisco Ruz, Jonathan P. Stewart
Summary: This passage introduces the organization of NGA-Sub data resources into a relational database and describes the Site table within that structure. It provides metadata for 6502 stations that have recorded earthquakes. The critical parameters for ground motion modeling, such as time-averaged shear-wave velocity (V-S(30)) and depths to various V-S horizons, are discussed. Proxy-based estimation frameworks are used when reliable data is not available, and uncertainties are provided for validation-free estimates.
EARTHQUAKE SPECTRA
(2022)
Article
Engineering, Civil
Victor Contreras, Jonathan P. Stewart, Tadahiro Kishida, Robert B. Darragh, Brian S. J. Chiou, Silvia Mazzoni, Robert R. Youngs, Nicolas M. Kuehn, Sean K. Ahdi, Katie Wooddell, Ruben Boroschek, Fabian Rojas, Jennyfer Ordenes
Summary: We present the source and path attributes of the NGA-Sub project's relational database, which contains information on 991 earthquakes from 1937 to 2016. The curated data includes earthquakes with high magnitudes, with 73% having M > 5 and 13 events having M > 8. The attributes in the database cover moment tensor, finite-fault parameters, and categorizations based on event types and sequence classification.
EARTHQUAKE SPECTRA
(2022)
Article
Engineering, Civil
Silvia Mazzoni, Tadahiro Kishida, Jonathan P. Stewart, Victor Contreras, Robert B. Darragh, Timothy D. Ancheta, Brian S. J. Chiou, Walter J. Silva, Yousef Bozorgnia
Summary: The NGA-Sub project has developed a relational database containing data resources and ground motion models for global subduction zone regions. The database consists of 20 tables and contains 71,340 three-component records from 1880 earthquakes. The data can be accessed to obtain ground motion intensity measures for different oscillator periods.
EARTHQUAKE SPECTRA
(2022)
Article
Engineering, Civil
Yousef Bozorgnia, Norman A. Abrahamson, Sean K. Ahdi, Timothy D. Ancheta, Linda Al Atik, Ralph J. Archuleta, Gail M. Atkinson, David M. Boore, Kenneth W. Campbell, Brian S-J Chiou, Victor Contreras, Robert B. Darragh, Sahar Derakhshan, Jennifer L. Donahue, Nick Gregor, Zeynep Gulerce, I. M. Idriss, Chen Ji, Tadahiro Kishida, Albert R. Kottke, Nicolas Kuehn, DongYoup Kwak, Annie O-L Kwok, P. Lin, Jorge Macedo, Silvia Mazzoni, Saburoh Midorikawa, Sifat Muin, Grace A. Parker, Sanaz Rezaeian, Hongjun Si, Walter J. Silva, Jonathan P. Stewart, Melanie Walling, Katie Wooddell, Robert R. Youngs
Summary: This article summarizes the Next Generation Attenuation (NGA) Subduction (NGA-Sub) project, which aims to develop a database and ground motion models (GMMs) for subduction regions. The project has developed the largest global database of subduction earthquakes, with 214,020 individual records from 1,880 subduction events. Four GMMs have been developed, including three global subduction GMMs and one Japan-specific model. The GMMs provide median predictions and variability for various ground motion parameters, and account for epistemic uncertainty in regions with sparse data. A damping scaling model has also been developed for adjusting predicted results.
EARTHQUAKE SPECTRA
(2022)
Article
Geochemistry & Geophysics
Pengfei Wang, Paolo Zimmaro, Tristan E. Buckreis, Tatiana Gospe, Scott J. Brandenberg, Sean K. Ahdi, Alan Yong, Jonathan P. Stewart
Summary: Frequency-dependent horizontal-to-vertical spectral ratios (HVSRs) can provide useful information for site response modeling, but are not commonly included in ground-motion models. To facilitate the use of HVSR, we developed a publicly accessible relational database that contains microtremor-based HVSR data and supporting metadata. Users can interact with the data through a graphical user interface or use external tools for further analysis.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Construction & Building Technology
Han Sun, Henry Burton, Jonathan P. Stewart, John W. Wallace
Summary: Models for reconstructing seismic response demands across multiple buildings can aid in cluster-level rapid postearthquake damage assessment. Given the recorded responses for a subset of instrumented buildings in a cluster, the demands in the uninstrumented buildings can be reconstructed by combining the median values generated from the structural response prediction model (SRPM) and estimated within-event residuals obtained from the kriging model.
JOURNAL OF STRUCTURAL ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Su Young Kang, Kwang-Hee Kim, Yong Sik Gihm, Byungmin Kim
Summary: The spatial distribution of the ground vulnerability index (K ( g )), estimated via ambient noise analysis, correlates well with the distribution of sand boils, making it an affordable supplement for earthquake screening and regional evaluations.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Engineering, Geological
Seong Jun Ha, Hwanwoo Seo, Byungmin Kim
Summary: Fault-rupture processes generate pulse-like ground motions in near-fault regions, characterized by large-amplitude long-period pulsing that can cause severe structural damage. This study examines their impact on cantilever retaining wall responses using numerical simulations. The research shows that the relative wall movements induced by pulse-like and non-pulse-like motions are not significantly different, instead, they are highly influenced by the ground motion Arias intensity. The simulations also demonstrate that ground motion asymmetry can affect the wall response, with motion asymmetric to the wall movement direction generating larger wall displacements.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Environmental
Harish Puppala, Pranav R. T. Peddinti, Byungmin Kim, Manoj Kumar Arora
Summary: Rooftop rainwater harvesting systems effectively provide water access by storing precipitated water. The use of satellite imagery has limitations on spatial resolution, thus UAVs with high-resolution spatial imagery have become popular. This study utilizes UAV-generated orthomosaics to estimate the harvestable quantity of rainwater and identifies a suitable site for constructing the storage unit using GIS.
Article
Construction & Building Technology
Saikat Sinha Ray, Pranav R. T. Peddinti, Ritesh Soni, Byungmin Kim, You-In Park, In-Chul Kim, Chang Young Lee, Young-Nam Kwon
Summary: This paper examines the performance of protective surface coatings applied to concrete, the most common building material. A novel synthesis method for producing ultrahydrophobic coatings is demonstrated, enhancing concrete impermeability. The modified concrete specimens showed superior hydrophobicity, which is crucial for maintaining the intended longevity and performance of various concrete materials.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Geological
Seong Jun Ha, Byungmin Kim
Summary: This study investigated the seismic responses of a cantilever retaining wall under earthquake sequences and found that the relative wall movements caused by mainshock-aftershock and foreshock-mainshock sequential ground motions can be larger than those caused by a single mainshock motion. The sequence itself had the effect of increasing the relative wall movements under strong sequential ground motions. However, the effects of the aftershock and foreshock motions on the wall responses were insignificant under weak sequential ground motions.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Construction & Building Technology
Hyeongjin Byeon, Jaeyeong Park, Byungmin Kim
Summary: This study evaluated the seismic stability of the stacked radioactive waste disposal container columns at the silo-type Gyeongju repository in Korea. The within-rock motions, based on ground motions measured at the repository site in 2016, were smaller than the actual ground motions. The computational investigation showed that the container columns are unlikely to collide or be damaged during seismic loads.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Review
Engineering, Civil
Pranav R. T. Peddinti, Harish Puppala, Byungmin Kim
Summary: The main objective of this study is to provide essential knowledge on the prevalent challenges of existing monitoring techniques and discuss the potential advantages of UAVs over conventional pavement monitoring practice. The study presents a state-of-the-art review emphasizing UAV technicalities in the context of image-based pavement monitoring, and provides a detailed workflow and checklist for drone deployment to ensure safe and high-quality data acquisition for novice users. Finally, the present challenges and future scope of UAV-based pavement monitoring are discussed.
JOURNAL OF TRANSPORTATION ENGINEERING PART B-PAVEMENTS
(2023)
Article
Social Issues
Harish Puppala, Pranav R. T. Peddinti, Jagannadha Pawan Tamvada, Jaya Ahuja, Byungmin Kim
Summary: Technological advances can transform agrarian rural areas by increasing productivity and efficiency, but there are barriers to the adoption of such technologies by rural farmers in emerging economies like India. This study identifies and classifies the barriers impacting adoption into technical, social, behavioural, operational, economic, and implementation categories. A hybrid multi-criteria framework is used to evaluate the relevance and importance of each barrier, and the paper suggests new avenues for accelerating technology adoption in rural areas of emerging economies.
TECHNOLOGY IN SOCIETY
(2023)
Article
Engineering, Civil
Dung T. P. Tran, Youngkyu Cho, Hwanwoo Seo, Byungmin Kim
Summary: This study evaluates the seismic fragilities of fill slopes in South Korea using parametric finite element analyses. Three slope geometries, three slope angles, and two soil types are considered. The results show that soil type, slope angle, and input ground motion influence the probabilities of exceeding different limit states, and the findings can assist regional authorities and engineers in assessing the seismic fragility of fill slopes in road systems in South Korea.
GEOMECHANICS AND ENGINEERING
(2023)
