Academic literature on the topic 'Aseismic moment'
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Journal articles on the topic "Aseismic moment"
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Xin, Chun Lei, and Bo Gao. "Composite Lining Aseismic Design for Fault-Crossing Tunnel Structures." Advanced Materials Research 971-973 (June 2014): 30–34. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.30.
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Although underground structures have stronger aseismic performance than ground structures, seismic disasters of mountain tunnels were fairly conspicuous in Wenchuan Great Earthquake. On the basis of seismic disaster analysis, a composite lining designfor tunnel structures across active fault was put forward. Three-dimensional numerical simulation method was used to analyze aseismic and damping effect of this structure. The results show that: (1)After setting aseismic and damping structure, the maximum internal forces value in lining the pattern of internal forces will not change. (2)Aseismic and damping structure setting can directly reduce the bending moment value and increase the axial force and stress force value in lining structure. (3) Relative to aseismic and damping structure, grouting region around damping layer can ameliorate internal force condition in lining structure and improve the effect of aseismic and damping structure. The above research results contribute to provide reference for seismic fortification of tunnel structures across active faults.
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Passarelli, Luigi, Paul Antony Selvadurai, Eleonora Rivalta, and Sigurjón Jónsson. "The source scaling and seismic productivity of slow slip transients." Science Advances 7, no. 32 (August 2021): eabg9718. http://dx.doi.org/10.1126/sciadv.abg9718.
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Slow slip events (SSEs) represent a slow faulting process leading to aseismic strain release often accompanied by seismic tremor or earthquake swarms. The larger SSEs last longer and are often associated with intense and energetic tremor activity, suggesting that aseismic slip controls tremor genesis. A similar pattern has been observed for SSEs that trigger earthquake swarms, although no comparative studies exist on the source parameters of SSEs and tremor or earthquake swarms. We analyze the source scaling of SSEs and associated tremor- or swarm-like seismicity through our newly compiled dataset. We find a correlation between the aseismic and seismic moment release indicating that the shallower SSEs produce larger seismic moment release than deeper SSEs. The scaling may arise from the heterogeneous frictional and rheological properties of faults prone to SSEs and is mainly controlled by temperature. Our results indicate that similar physical phenomena govern tremor and earthquake swarms during SSEs.
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McGarr, A., and Andrew J. Barbour. "Injection‐Induced Moment Release Can Also Be Aseismic." Geophysical Research Letters 45, no. 11 (June 5, 2018): 5344–51. http://dx.doi.org/10.1029/2018gl078422.
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Qi, Kang. "Aseismic Performance Analysis of High-Strength Concrete Circular Pier." Applied Mechanics and Materials 431 (October 2013): 161–66. http://dx.doi.org/10.4028/www.scientific.net/amm.431.161.
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Circular pier are widely used in bridge substructure. Strength and ductility are two important indicators reflect its aseismic performance. Based on the analysis of complete bending moment-curvature curve curvature, bending strength and ductility on reinforced concrete circular pier cross-section, this paper analyzes the aseismic performance of high-strength concrete circular pier. And it can provide reference for using high strength concrete more reasonable.
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Huang, Xing, Yanchuan Li, Xinjian Shan, Dezheng Zhao, Zhiyu Gao, Wenyu Gong, and Chunyan Qu. "InSAR Observations Reveal Variations in Shallow Creep on the Kangding Segment of the Xianshuihe Fault." Seismological Research Letters 94, no. 5 (June 30, 2023): 2291–300. http://dx.doi.org/10.1785/0220230053.
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Abstract Investigating the spatiotemporal characteristics of aseismic shallow creep provides insights into interseismic steady-state and/or postseismic transient behavior of faults. In this study, we focus on the Kangding segment of the Xianshuihe fault in eastern Tibet, where the 2014 Mw 5.9 Kangding earthquake occurred. Previous geodetic observations in 1999–2021 identified apparent shallow creep along this segment; however, whether the aseismic slip is secular creep, afterslip of the 2014 Kangding earthquake, or the combined effect remains unresolved. We process descending and ascending Interferometric Synthetic Aperture Radar data in the 2014–2021 period and investigate the creep rate variations on the fault plane. Our results reveal an ∼55-km-long aseismic slip section between Huiyuan Temple and Kangding Airport, of which the ∼15-km-long section between Huiyuan Temple and Jinlong Temple is in steady creep at a rate of 13 ± 2.0 mm/yr. Along the remaining ∼40-km-long section that overlaps the rupture of the Kangding earthquake, the creep rate decays from ∼40 to 0 mm/yr between 2014 and 2019, implying that the aseismic slip here is most likely the postseismic afterslip. We also identify a northwestward migration of aseismic creep from Huiyuan Temple to Longdengba during 2017–2021, which might be related to fluid diffusion. On the basis of the aseismic slip distribution, we quantitatively calculate the moment budget on the Kangding segment. The results show that the Huiyuan Temple-Longdengba section can produce an Mw 6.9 earthquake. Despite the 2014 Kangding earthquake, which ruptured the ∼40-km-long Jinlong Temple-Kangding Airport section, the accumulated seismic moment since the last major earthquake in 1748 is still sufficient for an Mw 7.0 earthquake.
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Yang, Qingshan, Bo Li, and Na Yang. "Aseismic behaviors of steel moment resisting frames with opening in beam web." Journal of Constructional Steel Research 65, no. 6 (June 2009): 1323–36. http://dx.doi.org/10.1016/j.jcsr.2009.01.007.
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Bürgmann, R., M. G. Kogan, V. E. Levin, C. H. Scholz, R. W. King, and G. M. Steblov. "Rapid aseismic moment release following the 5 December, 1997 Kronotsky, Kamchatka, Earthquake." Geophysical Research Letters 28, no. 7 (April 1, 2001): 1331–34. http://dx.doi.org/10.1029/2000gl012350.
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Sawires, Rashad, José A. Peláez, Federica Sparacino, Ali M. Radwan, Mohamed Rashwan, and Mimmo Palano. "Seismic and Geodetic Crustal Moment-Rates Comparison: New Insights on the Seismic Hazard of Egypt." Applied Sciences 11, no. 17 (August 25, 2021): 7836. http://dx.doi.org/10.3390/app11177836.
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A comparative analysis of geodetic versus seismic moment-rate estimations makes it possible to distinguish between seismic and aseismic deformation, define the style of deformation, and also to reveal potential seismic gaps. This analysis has been performed for Egypt where the present-day tectonics and seismicity result from the long-lasting interaction between the Nubian, Eurasian, and Arabian plates. The data used comprises all available geological and tectonic information, an updated Poissonian earthquake catalog (2200 B.C.–2020 A.D.) including historical and instrumental datasets, a focal-mechanism solutions catalog (1951–2019), and crustal geodetic strains from Global Navigation Satellite System (GNSS) data. The studied region was divided into ten (EG-01 to EG-10) crustal seismic sources based mainly on seismicity, focal mechanisms, and geodetic strain characteristics. The delimited seismic sources cover the Gulf of Aqaba–Dead Sea Transform Fault system, the Gulf of Suez–Red Sea Rift, besides some potential seismic active regions along the Nile River and its delta. For each seismic source, the estimation of seismic and geodetic moment-rates has been performed. Although the obtained results cannot be considered to be definitive, among the delimited sources, four of them (EG-05, EG-06, EG-08, and EG-10) are characterized by low seismic-geodetic moment-rate ratios (<20%), reflecting a prevailing aseismic behavior. Intermediate moment-rate ratios (from 20% to 60%) have been obtained in four additional zones (EG-01, EG-04, EG-07, and EG-09), evidencing how the seismicity accounts for a minor to a moderate fraction of the total deformational budget. In the other two sources (EG-02 and EG-03), high seismic-geodetic moment-rates ratios (>60%) have been observed, reflecting a fully seismic deformation.
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Gan, Shurong, Wen Pan, Hexian Su, Yucheng Jin, Chuanwei Zhu, and Shibin Yu. "Experimental Study and Numerical Simulation Analysis on Reinforcement of Mortise-Tenon Joints with Flat Steel Strips." Advances in Civil Engineering 2023 (March 2, 2023): 1–24. http://dx.doi.org/10.1155/2023/5398662.
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To study the aseismic performance after the reinforcement of the mortise-tenon joints of folk houses with traditional Chuan-Dou style wood structure and their steel plate, test specimens of joints—two for Tou mortise-tenon joints, two for Ban mortise-tenon joints, and two for dovetail mortise-tenon joints—were fabricated out of hemlock, and steel plates were utilized to reinforce one of the joint specimens of each type on the middle part of the mortise-tenon joint. By carrying out pseudo-static tests on the joints and building ABAQUS numerical model; the position where the mortise-tenon joints were to be reinforced by the steel plates was optimized for a comparative analysis into the test results on reinforced and unreinforced mortise-tenon joints and the numerically simulated bending moment-turning angle hysteresis curve, skeleton curve, energy-dissipating capacity, and rigidity degeneration curves. The results showed the following: the pulling-out phenomenon of tenons was severe, and the aseismic performance of Tou tenons was superior to Ban tenons and dovetail tenons; reinforcing the middle part of mortise-tenon joints with steel plates could effectively reduce the pulling-out amount of joints and promote the aseismic performance of mortise-tenon joints but have an insignificant promotive effect for the bearing capacity of Tou mortise-tenon joints; the aseismic performance was improved significantly after the flat steel strip reinforced position was moved to the upper and lower ends of mortise-tenon joints, with the ultimate bearing capacities being 1.5∼2.4 times that on the middle part of flat steel strip reinforced joints.
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Plattner, Christina, Alessandro Parizzi, Sara Carena, Stefanie M. Rieger, Anke M. Friedrich, Amir M. Abolghasem, and Francesco DeZan. "Long-lived afterslip of the 2013 Mw 6.1 Minab earthquake detected by Persistent Scatterer Interferometry along the Irer fault (western Makran-Zagros transition zone, Iran)." Geophysical Journal International 229, no. 1 (November 16, 2021): 171–85. http://dx.doi.org/10.1093/gji/ggab456.
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SUMMARY The ratio of seismogenic to aseismic deformation along active faults is needed to estimate their seismogenic potential and hazards. Seismologic and geodetic methods routinely capture coseismic displacements, but data acquisition requirements to fully document post-seismic deformation are not well known. Our study documents afterslip between about 18 months and 4 years after a mid-size earthquake and, based on remote structural mapping, we document fault rupture segments not previously associated with that earthquake. Persistent scatterer interferometric analysis of Sentinel-1A aperture radar data acquired between October 2014 and December 2018 reveals prolonged post-seismic deformation following the 11 May 2013 Mw 6.1 Minab earthquake and its aftershocks. The surface deformation data yield a sharp contrast across both the main seismogenic fault (here named the Irer fault) and its northeastern splay, and it is compatible with left-lateral motion along both faults. The PSI data helped us to identify and map the splay fault in the satellite imagery. We could then measure the geological offset along both faults, finding maximum displacements of about 1 km (main fault) and 350 m (splay). Our modelling of the observed post-seismic surface deformation pattern shows that post-seismic deformation was accommodated by left-lateral afterslip, not viscoelastic relaxation. This result is consistent with previous propositions that Mw 6 earthquakes do not measurably excite deeply seated viscoelastic relaxation mechanisms. Our afterslip modelling yields a slip pattern from the surface to a depth of 6 km to maximum 16 km, in agreement with the depth of the coseismic slip-distribution, and a maximum displacement of ∼7 cm along the fault, but located ∼8 km to the east of the coseismic slip maximum. Moment release during the observed afterslip in our study is Mw 5.7, or 12% of the coseismic moment released by main shock and aftershocks together. Combined with previously published results for the early post-seismic period (first 2 months), we estimate the aseismic moment to be at least ∼37% of the total, implying a high ratio of aseismic to seismic moment release for the Irer fault. Our results show that observation time windows well beyond 5 years are needed to record afterslip following mid-sized earthquakes. Thus, progress in understanding the transition from post-seismic to interseismic fault behaviour critically depends on the availability of data provided by satellite missions such as Copernicus Sentinel-1A. Similarly, robust comparison of the post-seismic rates with long-term geological rates requires palaeoseismic study and dating of related morphotectonic features.
Dissertations / Theses on the topic "Aseismic moment"
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Jiang, Jinlin. "Mechanical control on fluid-induced aseismic slip : insights from injection experiment modeling." Electronic Thesis or Diss., Université Paris sciences et lettres, 2023. http://www.theses.fr/2023UPSLM056.
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Les injections de fluides liées à l’exploitation de réservoirs géothermiques entraînent bien souvent la réactivation de failles, sous la forme d’un glissement lent ou asismique, déclenchant à son tour des séismes dits induits. Cette thèse est consacrée à une étude numérique du glissement asismique déclenché par injection de fluide. Un modèle FEM y est développé afin de simuler des expériences d’injection effectuées en presse triaxiale. Les simulations présentées dans ce travail permettent de quantifier l’effet du scenario d’injection, de la diffusivité de la faille, des propriétés de frottement et de l’état de contrainte initial sur la dynamique d’expansion du glissement asismique, fournissant un nouveau regard sur les lois d’échelles caractérisant la vitesse de rupture et le moment maximum libéré. L’approche présentée permet de fournir des pistes de réflexion pour améliorer l’évaluation de l’aléa lié à l’exploitation géothermique. Le modèle numérique développé est également validé sur un jeu de données expérimentales, ce qui ouvre des perspectives importantes pour approfondir l’interprétation mécanique des expériences d’injection menées en laboratoireFluid injections performed in the framework of geothermal exploitation can reactivate slip on preexisting crustal faults, leading to aseismic slip transients in turn triggering so-called triggered earthquakes. This PhD thesis is a numerical study dedicated to the physical control on the fluid-induced aseismic slip. A hydromechanical FEM is developed to simulate injection experiments performed in a tri-axial cell in the laboratory. The simulations presented allow to quantify the effect of the injection scenario, the hydraulic diffusivity, the fault friction and pre-stress on the dynamics of induced aseismic slip, providing new insights into the scaling laws commonly used to characterize this phenomenon, in particular the rupture speed and the maximum moment released. The approach presented here is thus of importance in the perspective of improving hazard mitigation in the context of geothermal exploitation. The model predictions are also validated on a real experimental dataset, which opens a new avenue to improve the mechanical interpretation of injection experiments in the laboratory
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Cheng, Tzu-Li, and 鄭子立. "A Study on the Pseudo-Elastic Method for Aseismic Capacity Assessment of High-rise Steel Frame Considering the MemberAxial Force Energy and Moment Energy." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/91710826943208032832.
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碩士國立臺灣大學
土木工程學研究所
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This paper presents the Pseudo-Elastic Method for aseismatic capacity assessment of high-rise steel frame considering the member moment energy and axial force energy. The Pseudo-Elastic Method for steel frame has been introduced and developed firstly, then a workable revised Pseudo-Elastic Method considering the member moment energy and axial force energy has been followed. Finally, the illustrations on the steel frame are presented and both original and revised methods are assisted to analysis. The conclusions are drawn as that: the revised Pseudo-Elastic Method can be used to analyze three-dimension steel frame with brace and the ultimate base shear could be assessed more precisely than the original Pseudo-Elastic Method..
Conference papers on the topic "Aseismic moment"
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Butt, Awais, Ahmadreza Hedayat, and Omid Moradian. "Energy Budgeting of Laboratory Hydraulic Fracturing in Granite with Different Viscosity Injection Fluids." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0751.
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ABSTRACT In this study, Barre granite cubes were hydraulically fractured in laboratory, using different viscosity injection fluids. Hydraulic Fracturing (HF) experiments were monitored with real-time acoustic emission (AE) setup which consisted of 16 calibrated Nano-30 sensors. The spectral parameters (corner frequency and low-frequency spectral plateau) were determined for each AE event by fitting the Brune Omega-squared model to the detected AE signals. Seismic parameters such as seismic moment, source radius stress drop, and seismic energy were determined after incorporating the focal mechanisms information determined through moment-tensor inversion. Higher breakdown pressures and fracture propagation times were observed for experiment conducted with higher-viscosity fluid. An inverse relationship was observed between corner frequency and seismic moment, similar to those observed for natural and induced seismicity emitted during large-scale events. The stress drop was found to be fairly constant across a wide range of seismic moment. The seismic moment, stress drop, and seismic energy were significantly higher for the higher viscosity injection fluid. However, the corner frequency and source radius were slightly larger for the lower-viscosity fluid. The seismic efficiency was <<1% (10−6-10−4 %) for both experiments but it was much lower for the experiment conducted with lower-viscosity injection fluid, implying a more aseismic response. INTRODUCTION Hydraulic fracturing (HF) is a technique used over the past decades, mainly to increase the reservoir rock permeability for geothermal resource extraction from kms deep crystalline granitic rock. However, HF is a complex phenomenon where it is often difficult to predict the HF growth and the underlying fracture mechanisms. In addition, the HF behavior can be significantly influenced by some key factors including hydro-mechanical properties of the host rock, in-situ stress, and injection parameters (injection fluid rate and viscosity) (Haimson and Fairhurst, 1967). Different viscosity injection fluids have been utilized for the stimulation process mainly to control the HF growth (Ishida et al. 2004). Many previous studies have shown that the attributes of produced fracture network can be drastically different depending on the viscosity of the injection fluid (Tanaka et al. 2020). For example, lower-viscosity injection fluids have been shown to produce more tortuous cracks with many secondary branches (Ishida et al. 2016). Increased stimulated reservoir volume has been shown to achieve with relatively lower-viscosity injection fluids (Warpinski et al. 2005). Understanding the characteristics of the generated HF for different viscosity injection fluids can be crucial to derive appropriate estimations for an efficient HF design.
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Pouya, Amade, Rafael Deptulski, Kyeung Hye Ahn, Estelle Rebel, and Michel Boisson. "Geomechanical Approach of Induced Seismicity using Cohesive Zone Elements." In International Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/igs-2022-104.
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Abstract This study aims to demonstrate the capability to account for seismic and aseismic responses due to fault reactivation using a cohesive zone model in a Finite Element framework. We adopt an elastic-damage-plastic formulation to predict the fault reactivation while considering unilateral effects observed in geomaterials. In a conceptual 2D problem representing two layers of rock separated by an existing fault, we apply displacement-driven and stress-driven shear loading to provide a first characterization of the instabilities and energy dissipation. Qualitative and quantitative analyses of the dissipative process are provided through the shear stress field and the evolution of the shear stress, displacement, and energy balance. We obtain through the present model the total of dissipated energy thanks to the energy balance. Also, while the elastic energy variation can be positive or negative depending on the type of boundary conditions (stress-driven or displacement-driven), the radiated elastic energy is always positive during seismic events. It is so a good candidate to determine the seismic moment. Introduction Instabilities in faulted mechanical systems are at the heart of numerous recent studies related to micro-seismic phenomena induced by human activities. Increasing interest to assess the potential for activation of existing faults in geologic sites has been observed in different applications such as CO2 sequestration (Nguyen et al., 2019), waste-water disposal (Walsh and Zoback, 2015), recovery of hydrocarbons (Davies et al., 2013), geothermal facilities (Majer et al., 2007) and nuclear waste disposal (Urpi et al., 2019). Several previous studies showed that both natural and anthropogenic factors determine fault reactivation phenomena (McGarr, 2014; Segall and Lu, 2015; Fan et al., 2016). The lack of long-term historical monitoring of seismic activity in candidate sites to host in-deep geological applications is an important drawback to assess the risks through empirical models. For this reason, numerical models were mainly used to predict fault reactivation response (e.g. finite element method (Haddad and Eichhubl, 2020), discrete element method (Langhi et al., 2010), finite difference method (Lee et al., 2013)).