Article
Geochemistry & Geophysics
Filippos Vallianatos, Kyriaki Pavlou
Summary: This article describes the situation of aftershocks following the earthquake in Samos, Greece in 2020, analyzing the scaling properties of seismic clusters and the changes in statistical mechanics.
Article
Biodiversity Conservation
Mingkang Yuan, Yi Xiao, Yang Yang, Cong Liu
Summary: Post-disaster reconstruction is crucial for achieving sustainable development in affected regions. This study explores the coupling and coordinated development of the economic-ecological-social (EES) complex system during the post-disaster reconstruction following the Wenchuan earthquake in China. The results indicate that post-disaster reconstruction significantly accelerates sustainable development, with distinct geographic stratification differences. Factors such as geographic location, ecological resource endowment, science and education, and the labor force are closely related to the coordination degree of the complex system.
ECOLOGICAL INDICATORS
(2023)
Article
Construction & Building Technology
Hamid Abbasgholiha, Vlado Gicev, Mihailo D. Trifunac, Reza S. Jalali, Maria I. Todorovska
Summary: This study uses numerical simulations to improve our understanding of the sequence of phenomena that accompany the collapse of buildings during damaging earthquakes. A nonlinear shear-beam model of a building is used to simulate the propagation of input pulses through the structure. The results show that the collapsing sequence of buildings is influenced by vertical upward and downward pulses of ground motion.
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
Nuclear Science & Technology
Wanruo Chen, Yongshan Zhang, Dayang Wang
Summary: This study found that the reinforced concrete auxiliary building significantly aggravates the damage of the nuclear power plant during beyond design basis earthquake sequences, and concrete damage increases with PGA. Additionally, aftershocks lead to an increase in residual displacement of the structure, and the dissipation energy of seismic damage in sequences shows a linear increasing trend.
NUCLEAR ENGINEERING AND DESIGN
(2021)
Article
Engineering, Geological
Joseph P. Vantassel, Andrew C. Stolte, Liam M. Wotherspoon, Brady R. Cox
Summary: HVSR (horizontal-to-vertical spectral ratio) is a widely used tool for measuring the resonant behavior of a site. Traditional methods for processing HVSR measurements can be tedious and time-consuming when dealing with complex HVSR with multiple resonances. This work proposes the AutoHVSR algorithm, which allows for fully-automated processing of HVSR measurements, including those with zero, one, or multiple clear resonances. The algorithm demonstrates excellent performance and significantly reduces processing time compared to traditional methods.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Pengfei Wang, Paolo Zimmaro, Sean K. Ahdi, Alan Yong, Jonathan P. Stewart
Summary: This study examines the identification of site resonances and the differences in horizontal-to-vertical spectral ratios (HVSRs) derived from different instruments for recording microtremors and seismic ground motions. It proposes a method for peak identification by considering peak amplitudes and widths, and finds that accelerometers with a broad full scale show a high rate of false negatives in HVSRs derived from microtremors. In contrast, HVSRs derived from seismometers have a higher consistency and reliability. Furthermore, it indicates that the use of earthquake-related HVSRs for site response models may overestimate model effectiveness, and mHVSRs are preferred for consistency.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2023)
Article
Chemistry, Multidisciplinary
Sophia-Ekaterini Avgerinou, Eleni-Apostolia Anyfadi, Georgios Michas, Filippos Vallianatos
Summary: Greece has experienced a series of strong earthquakes in the past five years, including the 6.0 Arkalochori earthquake on September 27, 2021, and the 6.3 Elassona earthquake on March 3, 2021. We study the temporal evolution of aftershock sequences using a statistical mechanics model and find a crossover behavior from power-law to exponential scaling for the interevent times distribution.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Multidisciplinary
Ali Massumi, Kabir Sadeghi, Hosein Ghaedi
Summary: This study investigated fragility curves of reinforced concrete moment-resisting frames under the effects of horizontal and vertical components of earthquakes, as well as the influence of previous events on structure collapse. The results showed significant impacts of damages caused by previous events and the vertical component of earthquakes on the collapse behavior of structures.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Computer Science, Artificial Intelligence
Dong Zhao, Lei Liu, Fanhua Yu, Ali Asghar Heidari, Mingjing Wang, Diego Oliva, Khan Muhammad, Huiling Chen
Summary: The research introduced improvements such as horizontal crossover search and vertical crossover search to enhance the solution quality and convergence speed of the ACOR algorithm, forming the improved CCACO algorithm. Experimental results demonstrate that CCACO shows superior convergence speed and solution quality in image segmentation.
EXPERT SYSTEMS WITH APPLICATIONS
(2021)
Article
Environmental Sciences
Yu Yang, Chenxiao Tang, Yinghua Cai, Chuan Tang, Ming Chen, Wenli Huang, Chang Liu
Summary: The 2008 Wenchuan earthquake resulted in a large number of landslides and the deposition of loose materials, which facilitated the occurrence of post-earthquake debris flows. A comprehensive database of debris flow events was established to analyze the influencing factors and spatial-temporal relationships. The results can provide guidance for debris flow prevention and dynamic evaluation of hazards in the affected area.
Article
Chemistry, Multidisciplinary
Jun-Kyoung Kim, Soung-Hoon Wee, Seong-Hwa Yoo, Kwang-Hee Kim
Summary: This study evaluated the response spectra of 24 earthquake series, exploring the effects of earthquake magnitude on resonance frequencies of structures and buildings. The observations were compared with design response spectra, with findings showing a strong influence of earthquake magnitude and resonance frequency on the shapes of response spectra.
APPLIED SCIENCES-BASEL
(2021)
Article
Multidisciplinary Sciences
Stephane de Palmas, Derek Soto, Ming-Jay Ho, Vianney Denis, Chaolun Allen Chen
Summary: The study characterizes the population structure and genetic connectivity of the broadcasting coral Pocillopora verrucosa from Ludao, an oceanic island off the eastern coast of Taiwan. Results showed high levels of connectivity among sites and depths, with individuals drawn from a single panmictic population. Simulations of recent migration revealed significant vertical and horizontal connectivity, suggesting potential for recovery following disturbances.
Article
Geochemistry & Geophysics
Camilo Pinilla-Ramos, Norman Abrahamson, Robert Kayen
Summary: The study evaluates several microtremor-based proxies for site amplification in ground-motion models using microtremor data obtained at seismic stations in California. The results show that the site fundamental period is highly correlated with short-period amplification when VS30 measurement is not available, while the normalized amplitude of the mHVSR(T) has the highest correlation with long-period amplification. When VS30 measurement is available, the normalized amplitude of the mHVSR(T) provides the most accurate representation of site amplification not explained by VS30. The study also develops empirical models based on the normalized mHVSR(T) curves for the site terms in the ground-motion models.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Engineering, Civil
Jianze Wang, Weiwei Chen, Kaoshan Dai, Tao Li, Solomon Tesfamariam, Yang Lu
Summary: In this study, the seismic responses of unanchored NSCs under near-fault earthquakes with strong vertical components were investigated. It was found that bidirectional excitations could increase the uncertainty in the sliding demands of NSCs and lead to more frequent overturning failures for slender NSCs.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2023)
Article
Geochemistry & Geophysics
Kun Ji, Yefei Ren, Ruizhi Wen
Summary: This study comprehensively investigated correlation coefficients between various intensity measures using earthquake records from China, providing a region-specific prediction model for seismic hazard assessment in China.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2021)
Article
Engineering, Geological
Ying Zhou, Hongwei Wang, Ruizhi Wen, Yefei Ren, Kun Ji
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2020)
Article
Engineering, Civil
Kun Ji, Ruizhi Wen, Chengcai Zong, Yefei Ren
Summary: This study developed an approach for selecting sets of ground motion recordings that match a target conditional multivariate distribution of ground motion intensity measures using a genetic algorithm. The proposed GA method efficiently searches and finds a desired number of recordings to represent the target conditional IMs' distribution, demonstrating that it is promising for searching pairs of recordings that could simultaneously match the target conditional distribution of various IMs.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Article
Engineering, Geological
Kun Ji, Ruizhi Wen, Yefei Ren, Weiyi Wang, Lansheng Chen
Summary: This study constructed a probabilistic seismic hazard map for mainland China, which showed consistent PGA values with the fifth-generation seismic hazard map for most principal cities. A three-dimensional disaggregation scheme was then performed for PGA and 5%-damped spectral acceleration corresponding to mean return periods of 475 and 2475 years.
BULLETIN OF EARTHQUAKE ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Hongwei Wang, Chunguo Li, Ruizhi Wen, Yefei Ren
Summary: It is crucial to consider the additional site amplification effects from thick sediment in the reliable assessment of seismic hazard in sedimentary basins. The study reveals that factors such as source-to-site distance, focal depth, and source azimuth have significant effects on additional site amplifications, especially focal depth. Thick sedimentary sites amplify long-period ground motions from distant earthquakes more strongly than those from local earthquakes, with ground motions from shallow crustal earthquakes experiencing stronger amplifications than those from deep subduction earthquakes.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Engineering, Civil
Kun Ji, Yefei Ren, Ruizhi Wen, ChuanBin Zhu, Ye Liu, Baofeng Zhou
Summary: This study investigated the application of the generalized regression neural network (GRNN) method for seismic site classification using China strong motion stations as an example case. The results showed that the GRNN method was able to predict site classes effectively, with high recall rates and similarities to reference pattern curves, indicating its robustness and accuracy in producing plausible results.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Geological
Chengcai Zong, Kun Ji, Ruizhi Wen, Xirong Bi, Yefei Ren, Xiaorui Zhang
Summary: The proposed three-stage optimization strategy based on computer simulation enhances the resilience of urban gas distribution networks. The FPDC-GA algorithm improves system robustness and resourcefulness, ML-KNN algorithm optimizes pressure test order, and greedy algorithm enhances the efficiency of pipeline repair.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Civil
Kun Ji, Weiyi Wang, Xiaohui Yu, Yefei Ren, Ruizhi Wen
Summary: This study evaluated the vector hazard of multiple spectral accelerations for different forms of conditional mean spectrum (CMS). By developing computational methods for multivariate exceedance rate (MER), the study found that MERk results were consistent with the anchored hazard level, while MERa and MERs results were influenced by the choice of spectral acceleration. The study also evaluated the MERk for generalized CMS (GCMS) and CMS conditioned at the logarithm-average spectral acceleration (CMS-AvgSa), finding that they were more close to the anchored hazard level compared to the uniform hazard spectrum (UHS).
JOURNAL OF EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Civil
Kun Ji, Chuanbin Zhu, Saman Yaghmaei-Sabegh, Jianqi Lu, Yefei Ren, Ruizhi Wen
Summary: In this study, a deep convolutional neural network (DCNN)-based technique is proposed to classify sites as an image recognition task based on the combination of topographic slope and mean horizontal-to-vertical spectral ratio (HVSR) of earthquake recordings. The proposed method achieves the highest accuracy rate among existing site classification schemes and shows good generalization and applicability in European sites.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2022)
Article
Engineering, Civil
Shengyin Qiang, Hongwei Wang, Ruizhi Wen, Yefei Ren, Jianwen Cui
Summary: A seismic sequence occurred in Yangbi county, Yunnan Province, with the strongest ground shakings on May 21st. Detailed analysis of the earthquakes revealed an asymmetrical source rupture and weaker contributions to ground motions.
JOURNAL OF EARTHQUAKE ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Yuting Zhang, Yefei Ren, Ruizhi Wen, Hongwei Wang, Kun Ji
Summary: This study used a collection of boreholes in Beijing, Tianjin, Guangxi, Guangdong, and three other municipalities and provinces to establish V-S30 prediction models based on terrain categories. The regional effects were verified by comparing morphometric parameter thresholds and terrain classification maps from global and regional digital elevation models. The developed V-S30 models could be used in developing regional ground motion models and earthquake disaster scenarios.
EARTH PLANETS AND SPACE
(2023)
Article
Geochemistry & Geophysics
Zhang YuTing, Ren YeFei, Wen RuiZhi, Wang DaRen, Ji Kun
Summary: This study developed a V-S30 parameter estimation method based on surface terrain features and validated its applicability in China. The results showed that the method has universal application but requires region-specific adjustments and development. Additionally, the inclusion of surface texture and local convexity improved the accuracy of V-S30 prediction.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2022)
Article
Geochemistry & Geophysics
Qiang ShengYin, Wang HongWei, Wen RuiZhi, Li ChunGuo, Ren YeFei
Summary: The study used the modified stochastic finite-fault method to simulate the ground motions of a magnitude 6.4 earthquake in Yangbi county, Yunnan Province. The results demonstrated good agreement with observed values, provided estimates for earthquake stress drop and rupture models, and analyzed pseudo spectral accelerations (PSAs) and seismic intensity maps.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2021)
Article
Geochemistry & Geophysics
Ye Liu, Yefei Ren, Ruizhi Wen, Hongwei Wang
Summary: A PTHA framework was developed for the coastal area of southeastern China, considering the impact from two types of potential tsunami sources. By evaluating seismic activity, generating scenario tsunamis, and producing tsunami hazard maps, regional variations in tsunami hazard for coastal regions of southeastern China were revealed.
PURE AND APPLIED GEOPHYSICS
(2021)
Article
Geochemistry & Geophysics
Peibin Xu, Yefei Ren, Ruizhi Wen, Hongwei Wang
PURE AND APPLIED GEOPHYSICS
(2020)
