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Artykuły w czasopismach na temat „Seismic instability”

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Data publikacji: 23 listopada 2024

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1

Bernal, Dionisio. "Instability of buildings during seismic response." Engineering Structures 20, no. 4-6 (1998): 496–502. http://dx.doi.org/10.1016/s0141-0296(97)00037-0.

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Rodríguez-Ochoa, Rafael, Farrokh Nadim, José M. Cepeda, Michael A. Hicks, and Zhongqiang Liu. "Hazard analysis of seismic submarine slope instability." Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards 9, no. 3 (2015): 128–47. http://dx.doi.org/10.1080/17499518.2015.1051546.

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Zhang, Jin, Yanguo Wang, David C. Nobes, Guangnan Huang, and Hongxing Li. "Deep seismic reflection data interpretation using balanced filtering method." GEOPHYSICS 82, no. 5 (2017): N43—N49. http://dx.doi.org/10.1190/geo2016-0061.1.

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Inverse [Formula: see text] filtering can perform energy compensation and phase correction of seismic reflection data, but it has an instability problem due to its high-pass characteristics. Although improved methods, such as gain-limited inverse [Formula: see text] filtering and stabilized inverse [Formula: see text] filtering, overcome the instability to some extent, they are not suitable for compensating deep seismic reflection events with weak energy. Focusing on the enhancement of deep seismic events, we have developed a balanced filtering method based on the ratio of the phase-compensate

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4

Du, Wen Feng, Fu Dong Yu, and Zhi Yong Zhou. "Dynamic Stability Analysis of K8 Single-Layer Latticed Shell Structures Suffered from Earthquakes." Applied Mechanics and Materials 94-96 (September 2011): 52–56. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.52.

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Aiming at the dynamic stability of the K8 single-layer latticed shell structures, it was carried out the dynamic stability analysis based on the finite element method(FEM) in this paper. The dynamic responses of the structure are calculated using the FEM and the B-R rule is applied to determine the dynamic instability critical loads. Results show that the dynamic instability is prone to take place in the K8 single-layer latticed shell structures under the severe seismic load and the dynamic instability critical seismic wave peak value is about 0.7g. The location of instability starts from the

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5

Wadas, S. H., S. Tschache, U. Polom, and C. M. Krawczyk. "Ground instability of sinkhole areas indicated by elastic moduli and seismic attributes." Geophysical Journal International 222, no. 1 (2020): 289–304. http://dx.doi.org/10.1093/gji/ggaa167.

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SUMMARY Elastic moduli derived from vertical seismic profiles (VSPs) and 2-D SH-wave reflection seismic profiles are used to characterize mechanical properties of rocks in sinkhole areas. VP and VS were used to calculate the Poisson’s ratio and the dynamic shear modulus. The study shows that 2-D shear wave reflection seismics is suited to depict the heterogeneities of the subsurface induced by subsurface erosion. Low shear wave velocities of ca. 120–350 m s–1 and low shear strength values between 25 and 250 MPa are identified for the subsurface erosion horizon that consists of soluble Permian

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6

Nyland, E., and Qing Li. "Analysis of seismic instability of the Vancouver Island lithoprobe transect." Canadian Journal of Earth Sciences 23, no. 12 (1986): 2057–67. http://dx.doi.org/10.1139/e86-190.

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Seismic refraction and reflection surveys and gravity measurements over Vancouver Island, British Columbia, Canada, can constrain a finite-element model of the geodynamics of the subduction zone. Stress estimates obtained from this model have been combined with rock failure criteria to yield a probability measure of seismic risk that assumes seismic events start from a dilute distribution of Griffith cracks. The results are in agreement with the observed seismicity and lead to the suggestion that the dominant mechanism of this oceanic plate subduction zone is gravitational ridge push and mantl

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7

Cui, Fang Peng, Yue Ping Yin, Rui Lin Hu, and Jin Qing Yu. "Failure Mechanisms of the Landslides Triggered by the 2008 Wenchuan Earthquake, China." Advanced Materials Research 594-597 (November 2012): 1864–68. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.1864.

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Taking the landslides triggered by the 2008 Wenchuan Earthquake as examples, their dynamic responses with different epicenter distances due to single and combined action with regionality and spatial heterogeneity of the Primary and Secondary waves were simulated by applying the Universal Distinct Element Code software. The results shows that the slope suffered from the combined action between P and S waves appears instability prior to the slope under single action of P wave. With the epicenter distance increasing, the key controlling factor resulting in the slope failure varies from the combin

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8

Orlando, Luciana. "Multidisciplinary Approach to a Recovery Plan of Historical Buildings." International Journal of Geophysics 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/258043.

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The paper emphasizes the advantages of employing multiple data techniques—geology, GPS, surveys of cracking, boreholes, seismic refraction and electrical resistivity tomography—to image the shallow stratigraphy and hypothesize the cause of instability of an urban area. The study is focused on the joint interpretation of the crack pattern, topographic monitoring and the features of the underground, to define the area affected by instability and the direction of ground motion with the objective to advance a hypothesis on the cause of the instability of the area and to depict the main features. B

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9

Taurbekova, A. Ә., О. Zh Mamyrbaev, K. Zh Doshtaev, and Т. К. Eginbaykyzy. "HYDRODYNAMIC INSTABILITY MECHANISM PROCESS FOR ASSESSMENT SEISMIC ACTIVITY." SERIES PHYSICO-MATHEMATICAL 4, no. 348 (2023): 268–89. http://dx.doi.org/10.32014/2023.2518-1726.234.

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10

Xue, Zongan, Yanyan Ma, Shengjian Wang, Huayu Hu, and Qingqing Li. "A Multi-Task Learning Framework of Stable Q-Compensated Reverse Time Migration Based on Fractional Viscoacoustic Wave Equation." Fractal and Fractional 7, no. 12 (2023): 874. http://dx.doi.org/10.3390/fractalfract7120874.

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Q-compensated reverse time migration (Q-RTM) is a crucial technique in seismic imaging. However, stability is a prominent concern due to the exponential increase in high-frequency ambient noise during seismic wavefield propagation. The two primary strategies for mitigating instability in Q-RTM are regularization and low-pass filtering. Q-RTM instability can be addressed through regularization. However, determining the appropriate regularization parameters is often an experimental process, leading to challenges in accurately recovering the wavefield. Another approach to control instability is l

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11

Kang, Kai, Andrey Ponomarev, Oleg Zerkal, Shiyuan Huang, and Qigen Lin. "Shallow Landslide Susceptibility Mapping in Sochi Ski-Jump Area Using GIS and Numerical Modelling." ISPRS International Journal of Geo-Information 8, no. 3 (2019): 148. http://dx.doi.org/10.3390/ijgi8030148.

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The mountainous region of Greater Sochi, including the Olympic ski-jump complex area, located in the northern Caucasus, is always subjected to landslides. The weathered mudstone of low strength and potential high-intensity earthquakes are considered as the crucial factors causing slope instability in the ski-jump complex area. This study aims to conduct a seismic slope instability map of the area. A slope map was derived from a digital elevation model (DEM) and calculated using ArcGIS. The numerical modelling of slope stability with various slope angles was conducted using Geostudio. The Spenc

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12

Humar, J., M. Mahgoub, and M. Ghorbanie-Asl. "Effect of second-order forces on seismic response." Canadian Journal of Civil Engineering 33, no. 6 (2006): 692–706. http://dx.doi.org/10.1139/l05-119.

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In a building structure subjected to seismic forces, the gravity loads acting through the lateral displacements lead to additional shears and moments. This is generally referred to as the P–Δ effect; it tends to reduce the capacity of the structure to resist the seismic forces and may lead to instability. It has been suggested that an increase in structural strength, in stiffness, or in both would mitigate the P–Δ effect and ensure stability of the structure. It is shown here that instability results when the P–Δ effect causes the stiffness of the structure to become negative in the post-yield

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13

Holt, Rob, and Andy Lubrano. "Stabilizing the phase of onshore 3D seismic data." GEOPHYSICS 85, no. 6 (2020): V473—V479. http://dx.doi.org/10.1190/geo2019-0695.1.

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When present, surface-consistent (shot and/or receiver) phase instability will generate surface-consistent time shifts that are at least partially removed from seismic data when surface-consistent residual statics corrections are applied. The phase instability will not be fully corrected and lingers undetected in the data throughout the remainder of the processing workflow. After processing finishes, seismic interpreters often need to apply laterally varying phase rotations to tie their onshore 3D seismic data to synthetic seismograms, before starting detailed stratigraphic interpretation proj

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14

Ma, Tian Zhong, and Yan Peng Zhu. "Seismic Strengthening Methods and Analysis of Instability of Gravity Retaining Walls." Advanced Materials Research 971-973 (June 2014): 2141–46. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.2141.

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Using the frame supporting structure of pre-stressed anchor bolt seismic strengthening technology reinforced the instability of gravity retaining wall. Earth pressure of retaining wall in seismic reinforcement after shall take between active and static earth pressure for the form of the distribution . In this paper, based on the limit equilibrium theory, and the whole stability for retaining walls is analysis, the theoretical formula of the stability safety factor between stability against slope and overturning safety factor is derived. By calculation and comparative analysis with an example,

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15

Yuan, Qingteng, Ming Xiao, Ci Kong, and Kaicheng Wang. "Seismic Response and Security Assessment of Cross-Fault Hydraulic-Tunnel Lining Structures." Buildings 13, no. 9 (2023): 2348. http://dx.doi.org/10.3390/buildings13092348.

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The foundation of a seismic safety assessment of cross-fault hydraulic tunnels is an acceptable and accurate seismic response. A dynamic contact force algorithm that may take into consideration the interaction between the fault–surrounding rock–lining structure was devised in light of the contact characteristics of various media in cross-fault hydraulic tunnels under seismic activity. A quantitative instability criterion using a relative displacement ratio as the criterion was devised based on the cusp catastrophe model. By using the cross-fault hydraulic tunnel of the Lawa Hydropower Station

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16

Han, Jing Jing, Bao Xian Liu, and Dong Liang Zhang. "Stability Analysis of S-RMS under Seismic Loading." Advanced Materials Research 261-263 (May 2011): 1336–40. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1336.

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Earthquake is one of the main geological disasters that cause slope instability. The stability analysis of soil-rock mixture slope under earthquake is made with FLAC3D in this paper. According to finding the shear strain concentrated deformation zone and the size of the displacement, they can help us to find the possible instability of the scope and location. The study result shows that the slope is stable in the natural state and certain displacement would occur in the potential slide mass of the slope under earthquake, and this must be taken into serious consideration in practical engineerin

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17

Rollo, Fabio, and Sebastiano Rampello. "Probabilistic assessment of seismic-induced slope displacements: an application in Italy." Bulletin of Earthquake Engineering 19, no. 11 (2021): 4261–88. http://dx.doi.org/10.1007/s10518-021-01138-5.

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AbstractEarthquake-induced slope instability is one of the most important hazards related to ground shaking, causing damages to the environment and, often, casualties. Therefore, it is important to assess the seismic performance of slopes, especially in the near fault regions, evaluating the permanent displacements induced by seismic loading. This paper applies a probabilistic approach to evaluate the seismic performance of slopes using an updated database of ground motions recorded during the earthquakes occurred in Italy. The main advantage of this approach is that of accounting for the alea

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18

Cano, Pablo A., and Ali Imanpour. "Evaluation of AISC Seismic Design Methods for Steel Multi-Tiered Special Concentrically Braced Frames." Engineering Journal 57, no. 3 (2020): 193–214. http://dx.doi.org/10.62913/engj.v57i3.1166.

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Steel multi-tiered concentrically braced frames (MT-CBFs) are commonly used in North America as a lateral load resisting system of tall single-story buildings. Past studies show that MT-CBF columns designed in accordance with the 2010 AISC Seismic Provisions are prone to buckling due to a high axial compression force combined with in-plane bending moments caused by the nonuniform distribution of inelastic brace deformations along the frame height. Special design provisions have been introduced in the 2016 AISC Seismic Provisions to address flexural demands imposed on MT-CBF columns and prevent

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19

Bažant, Zdeněk P., and Milan Jirásek. "Softening-Induced Dynamic Localization Instability: Seismic Damage in Frames." Journal of Engineering Mechanics 122, no. 12 (1996): 1149–58. http://dx.doi.org/10.1061/(asce)0733-9399(1996)122:12(1149).

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20

Cordier, Atrick P., Avid D. Mainprice, and Jed Leigh Mosenfelder. "Mechanical instability near the stishovite-CaCl2 phase transition: implications for crystal preferred orientations and seismic properties." European Journal of Mineralogy 16, no. 3 (2004): 387–99. http://dx.doi.org/10.1127/0935-1221/2004/0016-0387.

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21

Wayih, Nchini Livinus, Mabel Nechia Wantim, and Samuel Ndonwi Ayonghe. "Geotechnical Assessment of Seismic Vulnerability in the Built Environment of Fako Division, South West Region of Cameroon." Journal of Geography, Environment and Earth Science International 28, no. 8 (2024): 100–115. http://dx.doi.org/10.9734/jgeesi/2024/v28i8801.

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Introduction: Volcanic earthquakes may trigger severe hazards with considerable impact on the natural and built environment and the surrounding population. Aim: Evaluate the geotechnical characteristics of soils in Fako division to estimate their seismic vulnerability and recommend suitable stabilization techniques to enhance the safety and resilience of built environments. Place and Duration of Study: This study was conducted over a period of 12 months beginning from June 2022 to May 2023. Methodology: It employed a multi-criteria geotechnical approach, involving soil sampling, laboratory ana

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22

Wang, Zehao, Defeng Zheng, Zhongde Gu, Xingsen Guo, and Tingkai Nian. "A Methodology to Evaluate the Real-Time Stability of Submarine Slopes under Rapid Sedimentation." Journal of Marine Science and Engineering 12, no. 5 (2024): 823. http://dx.doi.org/10.3390/jmse12050823.

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Rapid sedimentation is widely recognized as a crucial factor in initiating the instability of submarine slopes. Once the slope fails, the subsequent landslide poses a significant threat to the safety of underwater infrastructures and potentially leads to severe damage to seabed pipelines, offshore foundations, and oil and gas exploitation wells. However, there is currently a lack of numerical methods to effectively assess the real-time stability of submarine slopes under rapid sedimentation. This study firstly employs a calibrated finite element (FE) model-change approach to reproduce the rapi

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23

Xiaowu, Pu, Wang Lanmin, Wang Ping, Chai Shaofeng, and Xu Shiyang. "A Method for Quantitative Evaluation of Seismic Stability of Loess Slope Based on the Shaking Table Model Test." Shock and Vibration 2021 (December 3, 2021): 1–13. http://dx.doi.org/10.1155/2021/5587489.

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The large-scale shaking table model test, which can directly reproduce the process of slope instability and failure, is an important technical means for the prediction and evaluation of slope seismic stability. However, up to now, the systematic slope stability evaluation method based on the shaking table slope model test has not been established, which limits the application of the expensive shaking table model test in slope seismic design. Therefore, the slope stability evaluation method based on the model test needs to be developed and innovated. In this research, through three loess slope

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24

Sun, Dun Ben, and Qing Wen Ren. "Catastrophic Analysis of Seismic Response of Gravity Dam Sliding along Base Surface." Advanced Materials Research 311-313 (August 2011): 2164–68. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.2164.

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For the instability problem of gravity dam sliding along base surface, cubic nonlinear constitutive model of soft material in base surface is adopted, which is usually expressed by Weibull model. Dynamic Equations of dam sliding along base surface is established. By means of catastrophe theory, the jumping and hysteresis phenomena of the vibration amplitude of the dam is analyzed, the parameter range of stable region in which amplitude doesn’t happen catastrophe is given and the factors which cause amplitude instability are discussed. The results obtained in the paper are of significant value

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Li, Jie, and Jun Xu. "Dynamic Stability and Failure Probability Analysis of Dome Structures Under Stochastic Seismic Excitation." International Journal of Structural Stability and Dynamics 14, no. 05 (2014): 1440001. http://dx.doi.org/10.1142/s021945541440001x.

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The intrinsic relationship between deterministic system and stochastic system is profoundly revealed by the probability density evolution method (PDEM) with introduction of physical law into the stochastic system. On this basis, stochastic dynamic stability analysis of single-layer dome structures under stochastic seismic excitation is firstly studied via incorporating an energetic physical criterion for identification of dynamic instability of dome structures into PDEM, which yields to sample stability (stable reliability). However, dynamic instability is not identical to structural failure d

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Havenith, H. B., A. Strom, D. Jongmans, A. Abdrakhmatov, D. Delvaux, and P. Tréfois. "Seismic triggering of landslides, Part A: Field evidence from the Northern Tien Shan." Natural Hazards and Earth System Sciences 3, no. 1/2 (2003): 135–49. http://dx.doi.org/10.5194/nhess-3-135-2003.

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Abstract. Landslides triggered by strong earthquakes often caused most of the global damage and most of all casualties related to the events, such as shown by the M = 7.7 Peru earthquake in 1970, by the M = 7.6 El Salvador earthquake in 2001 or by the M = 7.4 Khait (Tajikistan) earthquake in 1949. The obvious impact of a landslide on the population is directly related to its movement. Yet, prediction of future failure potential and hence future risk to population is necessary in order to avoid further catastrophes and involves the analyses of the origin of seismic instability. The seismic land

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27

Zania, Varvara, Yiannis Tsompanakis, and Prodromos N. Psarropoulos. "Seismic Distress and Slope Instability of Municipal Solid Waste Landfills." Journal of Earthquake Engineering 12, no. 2 (2008): 312–40. http://dx.doi.org/10.1080/13632460701574605.

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dos Santos, Filipe Amarante, Corneliu Cismasiu, and Francisco Braz Fernandes. "Cyclic Instability of Shape-Memory Alloys in Seismic Isolation Systems." International Journal of Structural Glass and Advanced Materials Research 2, no. 1 (2018): 82–95. http://dx.doi.org/10.3844/sgamrsp.2018.82.95.

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Hariri-Ardebili, M. A., and S. M. Seyed-Kolbadi. "Seismic cracking and instability of concrete dams: Smeared crack approach." Engineering Failure Analysis 52 (June 2015): 45–60. http://dx.doi.org/10.1016/j.engfailanal.2015.02.020.

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Hori, Y., and T. Kato. "Earthquake-Induced Instability of a Rotor Supported by Oil Film Bearings." Journal of Vibration and Acoustics 112, no. 2 (1990): 160–65. http://dx.doi.org/10.1115/1.2930108.

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The effect of seismic waves on the stability of a Jeffcott rotor supported by oil film bearings is investigated by calculating loci of the centers of the journal and the disk using the Runge-Kutta-Gill method. It will be shown that a linearly stable rotor can become unstable under a strong artificial shock and a real seismic wave, if it is running at speeds above twice the first critical speed, which is close to the natural frequency of the rotor. Thus, it will be pointed out that the linear analysis is insufficient to examine the stability of a rotor-bearing system if the rotor is operated ab

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Sun, Lin, Junchao Li, and Haoyu Lin. "Dynamic Stability Finite Difference Time Domain Analysis of Landfill Based on Hypergravity Test." Applied Sciences 14, no. 7 (2024): 3006. http://dx.doi.org/10.3390/app14073006.

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Earthquakes impact the stability of municipal solid waste (MSW) landfills, especially those with high water levels, and may further lead to disastrous landslides. Numerical analysis offers an efficient and cost-effective way to study the seismic stability of a landfill. In this study, the finite difference nonlinear analysis method was employed to meticulously evaluate the dynamic response of landfills under varying water levels and seismic intensities. The analysis was guided by the seismic instability and centrifuge test outcomes. The rationality of the computational model was verified by ex

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Liang, Hui, Jin Tu, Shengshan Guo, Jianxin Liao, Deyu Li, and Shiqi Peng. "Seismic fragility analysis of a High Arch Dam-Foundation System based on seismic instability failure mode." Soil Dynamics and Earthquake Engineering 130 (March 2020): 105981. http://dx.doi.org/10.1016/j.soildyn.2019.105981.

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Liang, Hui, Shengshan Guo, Yifu Tian, Jin Tu, Deyu Li, and Chunli Yan. "Probabilistic Seismic Analysis of the Deep Sliding Stability of a Concrete Gravity Dam-Foundation System." Advances in Civil Engineering 2020 (December 8, 2020): 1–10. http://dx.doi.org/10.1155/2020/8850398.

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There are various uncertainties in the design, construction, and operation of dams. These uncertainties have an important impact on the seismic response and seismic safety evaluation of concrete dams. In this research, a typical nonoverflow monolith of a concrete gravity dam is selected as a case study for the sliding stability analysis. Based on the analysis and demonstration of parameter sensitivity of friction coefficients and cohesion and their influence on the deep antisliding stability of the dam-foundation system, the probabilistic seismic analysis of a gravity dam-foundation system is

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Zhuge, Hanqing, Xianglong Zheng, Fangyuan Song, and Zhanzhan Tang. "Fiber Model Considering the Local Instability Effect and Its Application to the Seismic Analysis of Eccentrically Compressed Steel Piers." Applied Sciences 12, no. 12 (2022): 5838. http://dx.doi.org/10.3390/app12125838.

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To propose a seismic response calculation model for eccentrically compressed steel piers that can consider the local instability effect and horizontal bidirectional earthquake actions, in-plane and out-of-plane pseudo-static numerical simulation and bidirectional seismic response analysis are performed to study the applicability of the improved fiber model. The comparison results with the refined hybrid-element model show that the improved fiber model can accurately simulate the hysteretic performance of eccentrically compressed steel piers in the in-plane or out-of-plane directions and can be

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Buijze, Loes, Peter A. J. van den Bogert, Brecht B. T. Wassing, Bogdan Orlic, and Johan ten Veen. "Fault reactivation mechanisms and dynamic rupture modelling of depletion-induced seismic events in a Rotliegend gas reservoir." Netherlands Journal of Geosciences 96, no. 5 (2017): s131—s148. http://dx.doi.org/10.1017/njg.2017.27.

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AbstractUnderstanding the mechanisms and key parameters controlling depletion-induced seismicity is key for seismic hazard analyses and the design of mitigation measures. In this paper a methodology is presented to model in 2D the static stress development on faults offsetting depleting reservoir compartments, reactivation of the fault, nucleation of seismic instability, and the subsequent fully dynamic rupture including seismic fault rupture and near-field wave propagation. Slip-dependent reduction of the fault's strength (cohesion and friction) was used to model the development of the instab

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Han, Junguo, Yuanmin Yang, Muzi Du, and Rui Pang. "Seismic Reliability Analysis of an Excavation Slope Based on Direct Probability Integral Method." Mathematical Problems in Engineering 2024 (March 30, 2024): 1–10. http://dx.doi.org/10.1155/2024/7012424.

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China, situated in the circum-Pacific seismic belt, experiences frequent seismic activity and faces diverse geological conditions, making structural stability of paramount importance, especially under seismic conditions. The majority of current earthquake generation methods do not consider the nonstationary nature of earthquakes. This paper introduces a spectral representation-random function model for generating nonstationary earthquakes, effectively simulating stochastic seismic ground motion. Furthermore, traditional slope stability analysis methods are deterministic and incapable of provid

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Tremblay, Robert, and Laure Poncet. "Improving the Seismic Stability of Concentrically Braced Steel Frames." Engineering Journal 44, no. 2 (2007): 103–16. http://dx.doi.org/10.62913/engj.v44i2.906.

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An analytical study was performed to examine the seismic stability of multi-story concentrically braced steel frames. The building height was varied from 4 to 16 stories and three braced frame systems were studied: conventional braced frames, buckling-restrained braced frames, and dual buckling-restrained braced frames. All structures were designed according to Canadian seismic provisions. Different force modification factors were used and both the equivalent static load procedure and the modal response spectrum analysis were considered in design. P-delta effects were accounted for in the desi

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Zhao, Yan, Ningbo Mao, and Zhiming Ren. "A stable and efficient approach of Q reverse time migration." GEOPHYSICS 83, no. 6 (2018): S557—S567. http://dx.doi.org/10.1190/geo2018-0022.1.

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Amplitude energy attenuation and phase distortion of seismic waves caused by formation viscoelasticity reduce the resolution of reverse time migration (RTM) images. Q-RTM often is used to compensate the attenuation effects and improve the resolution of seismic imaging. However, serious high-frequency noise and tremendous amplitude will be produced during the wavefield extrapolation of Q-RTM, resulting in its inability to be imaged. Many Q-RTM algorithms solve the problem of instability through low-pass filtering in the wavenumber domain, but the method is less efficient in computation and has

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Chai, Xintao, Genyang Tang, Fangfang Wang, Hanming Gu, and Xinqiang Wang. "Q-compensated acoustic impedance inversion of attenuated seismic data: Numerical and field-data experiments." GEOPHYSICS 83, no. 6 (2018): R553—R567. http://dx.doi.org/10.1190/geo2017-0499.1.

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Acoustic impedance (AI) inversion is of great interest because it extracts information regarding rock properties from seismic data and has successful applications in reservoir characterization. During wave propagation, anelastic attenuation and dispersion always occur because the subsurface is not perfectly elastic, thereby diminishing the seismic resolution. AI inversion based on the convolutional model requires that the input data be free of attenuation effects; otherwise, low-resolution results are inevitable. The intrinsic instability that occurs while compensating for the anelastic effect

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Fomin, V., and І. Fomina. "CONSTRUCTION OF DYNAMIC INSTABILITY ZONES FOR HIGH STUCTURES UNDER SEISMIC IMPACT." Mechanics And Mathematical Methods 2, no. 2 (2020): 42–50. http://dx.doi.org/10.31650/2618-0650-2020-2-2-42-50.

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Seismic impacts create the possibility of parametric resonances, i.e. the possibility of the appearance of intense transverse vibrations of structure elements (in particular, of high-rise structures) from the action of periodic longitudinal forces. As a design model of a high-rise structure, a model is used which adopted in the calculation of high-rise structures for seismic effects, - a weightless vertical rod (column) rigidly restrained at the base with a system of concentrated masses (loads) located on it (Fig. 1). By solving the differential equation of the curved axis influence function f

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An, Ning, Huidong Zhang, Xinqun Zhu, and Fei Xu. "A Hybrid Approach for the Dynamic Instability Analysis of Single-Layer Latticed Domes with Uncertainties." International Journal of Structural Stability and Dynamics 21, no. 06 (2021): 2150082. http://dx.doi.org/10.1142/s0219455421500826.

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Currently, there is no unified criterion to evaluate the failure of single-layer latticed domes, and an accurate nonlinear time-history analysis (NTHA) is generally required; however, this does not consider the uncertainties found in practice. The seismic instability of domes subjected to earthquake ground motions has not been thoroughly investigated. In this paper, a new approach is developed to automatically capture the instability points in the incremental dynamic analysis (IDA) of single-layer lattice domes by integrating different efficient and robust methods. First, a seismic fragility a

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Zhang, Changjun, and Tadeusz J. Ulrych. "Seismic absorption compensation: A least squares inverse scheme." GEOPHYSICS 72, no. 6 (2007): R109—R114. http://dx.doi.org/10.1190/1.2766467.

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The problem of instability plagues conventional inverse [Formula: see text] filtering. We formulate the deabsorption problem as an inverse problem in terms of least squares and impose regularization by means of Bayes’ theorem. The solution is iterative and nonparametric and returns a reflectivity that has been constrained to be sparse. The inverse scheme is tested on both synthetic and real data and the results obtained demonstrate the viability of the approach.

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Dadfar, Behrang, M. Hesham El Naggar, and Miroslav Nastev. "Quantifying exposure of linear infrastructures to earthquake-triggered transverse landslides in permafrost thawing slopes." Canadian Geotechnical Journal 54, no. 7 (2017): 1002–12. http://dx.doi.org/10.1139/cgj-2017-0076.

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Seismic shaking can cause slope instability in otherwise relatively stable permafrost terrains. In addition, rapid ice melting in low-permeability fine-grained soils can lead to excess pore-water pressure build-up and cause instability in slopes even at small angles. This study addresses the active-layer detachment (ALD) slope instability hazard and develops a systematic risk assessment framework for existing and future linear infrastructures, such as energy pipelines, bridges, and roads traversing permafrost regions. Mild slopes, with average gradient of 7°, are considered in this study as th

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Bogomolov, L. M., and V. N. Sychev. "Fundamental for self-developing processes model and problems of its application to earthquakes prediction in the Far East region." Geosystems of Transition Zones 5, no. 2 (2021): 138–52. http://dx.doi.org/10.30730/gtrz.2021.5.2.138-145.145-152.

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Seismic activation in the period of foreshocks (prior to the mainshock) described by the model of self-developing processes (SDP) is possibly a manifestation of explosive instability of low frequency straining waves in metastable medium. To highlight so nontrivial relationship of continuous wave motions and discrete seismic events flow is a goal of this narrative. Thus, the rationale of the SDP model (the equation, in reality) has been modified, which is of importance in relevance with the article by the Malyshevs in the current issue (A.I. Malyshev, L.K. Malysheva. Precedent-extrapolation est

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Bassetti, Matteo, Andrea Belleri, and Alessandra Marini. "Dynamic instability of axially loaded elements: General considerations and seismic loading." Journal of Constructional Steel Research 170 (July 2020): 106088. http://dx.doi.org/10.1016/j.jcsr.2020.106088.

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Beresnev, I. A., and V. N. Nikolaevskiy. "A model for nonlinear seismic waves in a medium with instability." Physica D: Nonlinear Phenomena 66, no. 1-2 (1993): 1–6. http://dx.doi.org/10.1016/0167-2789(93)90217-o.

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Carotti, A., and R. Chiappulini. "Brake systems for protecting large structures from seismic or aerodynamic instability." Engineering Structures 16, no. 8 (1994): 625–36. http://dx.doi.org/10.1016/0141-0296(94)90048-5.

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Dong, Longjun, Huanyu Zhu, Fang Yan, and Shuijin Bi. "Risk Field of Rock Instability using Microseismic Monitoringdata in Deep Mining." Sensors 23, no. 3 (2023): 1300. http://dx.doi.org/10.3390/s23031300.

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With the gradual depletion of surface resources, rock instability caused by deep high stressand mining disturbance seriously affects safe mining. To create effective risk management, a rockinstability risk field model using microseismic monitoring data is proposed in this study. Rockinstability risk was presented visually in 3D visualization. The in-situ microseismic monitoringdata was collected and analyzed to make calculation of peak ground velocity (PGV), peak groundacceleration (PGA), energy flux, energy and seismic moment. Indicator weights of PGV, PGA, energyflux are confirmed by using t

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Saritaş, Fevzi, Idris Bedirhanoglu, Arova Konak, and Mehmet Salih Keskin. "Effect of Seismic Isolation on the Performance of High-Rise Buildings with Torsional Instability." Sustainability 15, no. 1 (2022): 36. http://dx.doi.org/10.3390/su15010036.

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Seismic bearings have been used to mitigate the harmful effect of the earthquakes. Torsion mode, one of the most important irregularities, generally increases the shear forces to the vertical members such as columns and shear walls in turn this may results in brittle failure of the reinforced concrete (RC) members. Accordingly, it is vital to eliminate the torsion failure mode or switch to the higher modes with lower mass contribution. This study has evaluated the seismic performance of a high-rise building with torsion mode through push-over analysis including nonlinear time history analyses.

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Zaruma, Santiago R., and Larry A. Fahnestock. "Seismic Stability of Buckling-Restrained Braced Frames." Key Engineering Materials 763 (February 2018): 924–31. http://dx.doi.org/10.4028/www.scientific.net/kem.763.924.

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Buckling Restrained Braced Frames (BRBFs) are widely used as seismic force resisting systems due to their ductility and energy dissipation. However, because of the modest overstrength and relatively low post-yielding stiffness, BRBFs subjected to seismic loading may be susceptible to concentrations of story drift and global instability triggered by P-∆ effects. Due to the use of simplistic methods that are based on elastic stability, current code design provisions do not address seismic stability rigorously and do not consider the particular inelastic response of a system. Design strategies ar

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