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Статті в журналах з теми "Structural Motion"

Автор: Grafiati

Опубліковано: 7 червня 2025

Оновлено: 2 серпня 2025

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1

Tsuji, Toshio, Yusuke Ishida, Koji Ito, Mitsuo Nagamachi, and Tatsuo Nishino. "Motor Schema Model Learned by Structural Neural Networks." Journal of Robotics and Mechatronics 2, no. 4 (1990): 258–65. http://dx.doi.org/10.20965/jrm.1990.p0258.

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Анотація:

Human beings remember plans concerning typical motions which occur frequently as schema, and by selecting suitable schema depending on conditions, generate muscular motion almost unconsciously. Though a motor schema represents typical motions, it is equipped with superior plan structure taking into consideration the concurrency and seriality of motions as seen in grasping actions and walking motions, and the structure of plans can be acquired by learning. In this paper, a study is made of the modeling of such motor schema with the use of neural networks. For this purpose, the neural network is

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2

Lee, Byungseok, Donghwe Lee, and Seongah Chin. "Structural Motion Grammar for Universal Use of Leap Motion: Amusement and Functional Contents Focused." Journal of Sensors 2018 (2018): 1–15. http://dx.doi.org/10.1155/2018/6073786.

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Анотація:

Motions using Leap Motion controller are not standardized while the use of it is spreading in media contents. Each content defines its own motions, thereby creating confusion for users. Therefore, to alleviate user inconvenience, this study categorized the commonly used motion by Amusement and Functional Contents and defined the Structural Motion Grammar that can be universally used based on the classification. To this end, the Motion Lexicon was defined, which is a fundamental motion vocabulary, and an algorithm that enables real-time recognition of Structural Motion Grammar was developed. Mo

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3

Singh, Jogeshwar P. "Earthquake Ground Motions: Implications for Designing Structures and Reconciling Structural Damage." Earthquake Spectra 1, no. 2 (1985): 239–70. http://dx.doi.org/10.1193/1.1585264.

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Until recently, characteristics of strong ground motion resulting from different soil conditions were considered the dominant factor in developing design ground motions and reconciling observed damage. Interpretation of recent recordings of earthquakes by strong motion instrument arrays installed in California and Taiwan show that basic characteristics of strong motion are greatly influenced by the seismological and geological conditions. For a given soil condition, the characteristics of strong ground motion (peak ground acceleration, peak ground velocity, peak ground displacement, duration,

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4

Hershenson, Maurice. "Structural Constraints: Further Evidence from Apparent Motion in Depth." Perception 22, no. 3 (1993): 323–34. http://dx.doi.org/10.1068/p220323.

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The three-dimensional (3-D) apparent motion of lines, outline triangles, and light points was studied in four experiments. The stimulus sequences were beginning and end patterns of 3-D motions of a line and a triangle. Light-point patterns corresponded to the ends of the lines and the vertices of the triangles. Perceived motion of lines and light-point pairs resembled the distal motions that were used to construct the proximal patterns. The correspondence was striking for configurations that appeared to move in depth. Outline triangles and light-point triplets produced a strong correspondence

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5

Zhang, Dashan, Andong Zhu, Wenhui Hou, Lu Liu, and Yuwei Wang. "Vision-Based Structural Modal Identification Using Hybrid Motion Magnification." Sensors 22, no. 23 (2022): 9287. http://dx.doi.org/10.3390/s22239287.

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Анотація:

As a promising alternative to conventional contact sensors, vision-based technologies for a structural dynamic response measurement and health monitoring have attracted much attention from the research community. Among these technologies, Eulerian video magnification has a unique capability of analyzing modal responses and visualizing modal shapes. To reduce the noise interference and improve the quality and stability of the modal shape visualization, this study proposes a hybrid motion magnification framework that combines linear and phase-based motion processing. Based on the assumption that

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6

Ventura, Carlos E., W. D. Liam Finn, and Norman D. Schuster. "Seismic response of instrumented structures during the 1994 Northridge, California, earthquake." Canadian Journal of Civil Engineering 22, no. 2 (1995): 316–37. http://dx.doi.org/10.1139/l95-045.

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Анотація:

This paper presents an overview of strong motion records obtained from instrumented structures during the 1994 Northridge earthquake. It describes the behaviour of buildings, bridges, and dams that have been instrumented by the major strong motion instrumentation networks operating in California and highlights important features of the most significant structural motions recorded during the earthquake. The structural damage observed during a reconnaissance visit to the affected areas by the earthquake is correlated with preliminary analyses of the recorded motions. Detailed discussions of the

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7

Li, Bo, Qinghui Lai, Endong Guo, Chenxi Mao, and Xiaofei Li. "Determining the Optimal Scalar Intensity Measure of Floor Communication Towers." Shock and Vibration 2022 (February 23, 2022): 1–12. http://dx.doi.org/10.1155/2022/6347334.

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Анотація:

Various structural types and ground motion characteristics lead to distinct intensity measures of structural seismic performance. For the lattice high-rise steel structure of communication towers, determining the intensity measures to adjust ground motion is critical. Additionally, a crucial problem is whether the ground motion intensity parameters of pulse-like ground motion and ordinary ground motion are consistent. In this study, a standard floor four-leg angle steeled communication tower was considered the study object, and 50 pulse-like ground motions and 50 ordinary ground motions were i

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8

Yao, Yinyin, Wenge Wu, Ruiqin Li, and Yaohong Zhao. "Parasitic Motions of 3-PRS Parallel Mechanisms with Two Different Branch Chain Arrangements." Applied Sciences 13, no. 9 (2023): 5425. http://dx.doi.org/10.3390/app13095425.

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The kinematics of 3-PRS parallel mechanisms (PMs), an important category of 2R1T PMs, is very important for the motion control and error compensation of PMs. In order to produce a spindle head that could meet the requirements of various machining accuracy levels, a definite kinematics analysis of the PMs par should be taken with caution firstly. Here, the mathematical models of two 3-PRS PMs with different branch chain arrangements were established using the Euler angle. The kinematic equations of two 3-PRS PMs were obtained by establishing the closed-vector loop equation according to structur

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9

Wang, Ying, Enrique Villalobos, Santiago Pujol, et al. "On the Seismic Response of the Faculty of Architecture and Engineering Building at Tohoku University." Earthquake Spectra 32, no. 1 (2016): 523–45. http://dx.doi.org/10.1193/053013eqs139m.

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Анотація:

The Faculty of Architecture and Engineering Building at Tohoku University survived two strong ground motions. This is not surprising because the structure was stiff and strong. What is surprising is that the first ground motion did not cause severe structural damage but the second one caused so much structural damage that the building had to be evacuated and demolished. The damage occurred despite two key facts: (1) the intensities of the mentioned ground motions are understood to have been similar and (2) the building was strengthened after the first motion (and before the second) following s

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10

Zhou, Yundong, Yongxin Wu, Ziheng Shangguan, and Zhanbin Wang. "Effects of Spatially Varying Seismic Ground Motions and Incident Angles on Behavior of Long Tunnels." Advances in Civil Engineering 2018 (June 11, 2018): 1–6. http://dx.doi.org/10.1155/2018/8195396.

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Seismic behavior of long circle tunnels is significantly influenced by the nature of input motion. This study, based on the 3D finite-element method (FEM), evaluates the effects of spatially varying seismic ground motions and uniform input seismic ground motions and their incident angles on the diameter strain rate and tensive/compressive principal stresses under different strata. It is found that (1) the spatially varying seismic ground motions induced larger diameter strain rate (radially deformation) than the uniform input seismic motion, (2) the spatially varying seismic ground motions had

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11

Fomin, Alexey. "The Synthesis, Designing and Analysis of the Spatial Mechanisms with Imposed Constraints." Applied Mechanics and Materials 756 (April 2015): 495–99. http://dx.doi.org/10.4028/www.scientific.net/amm.756.495.

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The present study provides structural synthesis, designing of 3D models and kinematic analysis of the developed spatial one-and two-movable mechanisms with imposed constraints. These mechanisms have an opportunity of technological application as mechanisms for cutting the complex internal surfaces of machine elements. The mechanisms produce a special kind of screw motion which is the most suitable means for cutting of complex spatial surfaces. Structural synthesis was based on mathematical solution of universal structural system where numbers of kinematic pairs and movable links were calculate

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12

Li, Jinrun, and Yangmin Li. "The Structural Design, Kinematics, and Workspace Analysis of a Novel Rod–Cable Hybrid Cable-Driven Parallel Robot." Biomimetics 10, no. 1 (2024): 4. https://doi.org/10.3390/biomimetics10010004.

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This study presents a novel rod–cable hybrid planar cable-driven parallel robot inspired by the biological synergy of bones and muscles. The design integrates rigid rods and flexible cables to enhance structural stability and precision in motion control. The rods emulate bones, providing foundational support, while the cables mimic muscles, driving motion through coordinated tension. This design enables planar motions with three degrees of freedom, and a structural configuration that mitigates sagging and vibration for improved stability and accuracy by introducing rigid structure. The study d

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13

Shen, Li, Shi, and Zhou. "Modified Multi-Support Response Spectrum Analysis of Structures with Multiple Supports under Incoherent Ground Excitation." Applied Sciences 9, no. 9 (2019): 1744. http://dx.doi.org/10.3390/app9091744.

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This study develops a modified multi-support response spectrum (MSRS) method, in order to efficiently and accurately calculate the response of multi-support structures under incoherent ground motions. The modified MSRS method adopts three ancillary processes, constructing structural displacement vectors or constructing infinite stiffness members or increasing the degrees of freedom at structural supports. Then, the modified MSRS method is verified in a comparison with the existing MSRS method through a model of a five-span reinforced concrete continuous rigid frame bridge. Finally, the collect

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14

Wang, Ning, Yu Zhang, Linghui Peng, and Wenchuan Zhao. "Hydrodynamic Characteristics Study of Bionic Dolphin Tail Fin Based on Bidirectional Fluid–Structure Interaction Simulation." Biomimetics 10, no. 1 (2025): 59. https://doi.org/10.3390/biomimetics10010059.

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Using bidirectional fluid–structure interaction technology, the dorsal–ventral motion of the dolphin tail fin was simulated, and the feasibility of the numerical simulation method was validated through underwater motion experiments. This study investigated the effects of structural parameters and motion modes of bionic dolphin tail fins on their propulsion performance. The results show that flexible tail fins can enhance propulsion performance. Compared to equal-thickness flexible tail fins, variable-thickness flexible tail fins that conform to the structural characteristics of real dolphin ta

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15

Assimaki, Dominic, Wei Li, and Michalis Fragiadakis. "Site Effects in Structural Response Predictions of Inelastic SDOF Oscillators." Earthquake Spectra 28, no. 3 (2012): 859–83. http://dx.doi.org/10.1193/1.4000056.

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Анотація:

We study how the inelastic structural response predicted via synthetic seismograms is affected by the selection of site response models in ground motion simulations. We first generate synthetics for multiple scenarios and site conditions in Southern California using attenuation relations, site specific linear, vis-coelastic and nonlinear analyses, and estimate the ground motion variability that results from the soil model selection. We next use bilinear single degree-of-freedom oscillators to demonstrate how this variability propagates to the inelastic structural response predictions. Results

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16

Tao, Dongwang, Jiali Lin, and Zheng Lu. "Time-Frequency Energy Distribution of Ground Motion and Its Effect on the Dynamic Response of Nonlinear Structures." Sustainability 11, no. 3 (2019): 702. http://dx.doi.org/10.3390/su11030702.

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The ground motion characteristics are essential for understanding the structural seismic response. In this paper, the time-frequency analytical method is used to analyze the time-frequency energy distribution of ground motion, and its effect on the dynamic response of nonlinear structure is studied and discussed. The time-frequency energy distribution of ground motion is obtained by the matching pursuit decomposition algorithm, which not only effectively reflects the energy distribution of different frequency components in time, but also reflects the main frequency components existing near the

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17

Zhang, Chang Hao, Wei Wang, Hu Wang, and Xun Tao Wang. "The Influence of near-Fault Ground Motions on the Seismic Response of Reinforced Concrete Frame." Applied Mechanics and Materials 90-93 (September 2011): 2633–39. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.2633.

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This paper examined the engineering characteristics of the near-fault ground motion. The four-story reinforced concrete frame was designed under Code for seismic design of building (GB50011-2010).The SAP2000 software was applied to model it, and the nonlinear time history analyses of structure were implemented. Near-fault ground motions with forward directivity and fling-step and far field ground motions were selected as seismic inputs．The results show that in terms of some structural dynamic response parameters, such as the vertex displacement, between the corner of the layer displacement, an

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18

Liu, Tong, Fuwang Xu, Qinghe Wang, and Huaiyu Xu. "Structural dynamic response of underground structure with vertical ground motion input." E3S Web of Conferences 293 (2021): 02016. http://dx.doi.org/10.1051/e3sconf/202129302016.

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Since many cases of structural damage in past earthquakes have been attributed to strong vertical ground motion, our understanding of vertical seismic load effects and their influence on seismic performance of subway station structure is limited. In this study, the Daikai subway station is taken as a typical example. A two-dimensional finite element model of both soil and structure was established using finite element software ABAQUS. Two input approaches of ground motion are considered, including the horizontal component alone and the vertical and horizontal motions simultaneously. Four group

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19

Aquib, Tariq A., Jayalakshmi Sivasubramonian, and Paul M. Mai. "Analysis of Ground Motion Intensity Measures and Selection Techniques for Estimating Building Response." Applied Sciences 12, no. 23 (2022): 12089. http://dx.doi.org/10.3390/app122312089.

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The structural response of buildings to earthquake shaking is of critical importance for seismic design purposes. Research on the relationship between earthquake ground motion intensity, building response, and seismic risk is ongoing, but not yet fully conclusive. Often, probability demand models rely on one ground motion intensity measure (IM) to predict the engineering demand parameter (EDP). The engineering community has suggested several IMs to account for different ground motion characteristics, but there is no single optimal IM. For this study, we compile a comprehensive list of IMs and

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20

Hao, H., and L. Gong. "Analysis of Coupled Lateral-Torsional-Pounding Responses of One-Storey Asymmetric Adjacent Structures Subjected to Bi-Directional Ground Motions Part II: Spatially Varying Ground Motion Input." Advances in Structural Engineering 8, no. 5 (2005): 481–96. http://dx.doi.org/10.1260/136943305774857990.

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This is the second paper presenting numerical results of a parametric study of seismic induced lateral-torsional-pounding responses of an asymmetric and a symmetric one-storey adjacent structure. The accompany paper (Part I) (Gong and Hao 2004) assumed ground motion input at all structural supports as uniform. Torsional responses are generated because of inherent structural eccentricity and eccentric pounding. In reality, seismic ground motion at different structural supports inevitably varies owing to wave propagation. Spatially varying ground motion will induce torsional responses of structu

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21

Lu, H. "Structural processing in biological motion perception." Journal of Vision 10, no. 12 (2010): 13. http://dx.doi.org/10.1167/10.12.13.

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22

Wang, Y. Z. "Motion and stability of caisson breakwaters under breaking wave impact." Canadian Journal of Civil Engineering 28, no. 6 (2001): 960–68. http://dx.doi.org/10.1139/l01-040.

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The possible motions of caisson breakwaters under dynamic load excitation include vibrating motion, vibratingsliding motion, and vibratingrocking motion. Three models are presented in this paper and are used to simulate the histories of vibratingslidingrocking motions of caissons under breaking wave impact. The effect of the dynamic characteristics of the caissonfoundation system and the motions on the displacement, rotation, sliding force, and overturning moment of caissons are investigated. It is shown that the sliding force of the caisson is different from the breaking wave force direc

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23

Bhavna, Saini*1 &. Prof. Satish Parihar2. "REACTION OF VARIOUS VIBRATIONAL MOTIONS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 7, no. 6 (2018): 68–74. https://doi.org/10.5281/zenodo.1260399.

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Анотація:

Structural dynamic is a mandatory graduate level course for structural engineering student all around the world. In civil engineering buildings are mostly designed based on prescriptive methods of standard codes. Usually loads on these buildings are of low magnitude which results in elastic structural behavior. However, strong loads such as a sudden earthquake will lead the building beyond its elastic limit. Generally 4 kinds of earthquake ground motions are considered such as Fault Normal, Fault Parallel, Near Fault and Far Fault components. In the current study the performance of a building

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24

Goel, Rakesh K. "Comparison of Base Shears Estimated from Floor Accelerations and Column Shears." Earthquake Spectra 27, no. 3 (2011): 939–46. http://dx.doi.org/10.1193/1.3610247.

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This paper compares base shears computed from floor accelerations (inertial base shear) and column shears (structural base shear) for two mid-rise, multistory buildings due to a suite of 30 earthquake ground motions. The presented results demonstrate that the inertial base shear exceeds the structural base shear in the median by 10% to 20% and may exceed the structural base shear by as much as 70% for individual ground motions. Therefore, it is concluded that the inertial base shear computed from strong motion records should be used with caution to estimate the structural base shear.

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25

Rohmer, Ophélie, Maria Paola Santisi d’Avila, Etienne Bertrand, and Julie Regnier. "Rocking Motion Analysis Using Structural Identification Tools." Geotechnics 3, no. 3 (2023): 601–23. http://dx.doi.org/10.3390/geotechnics3030033.

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This research investigates the convenience of structural identification tools to detect the rocking motion tendency, using as input the structural response to ambient vibrations. The rocking ratio and rocking spectrum are proposed as original tools to highlight the rocking motion and its frequency content. The proposed procedure allows the detection and quantification of rocking using only building vertical motion records in both cases of ambient vibration and earthquake. First, three-dimensional finite element models of reinforced concrete buildings are adopted to simulate the structural resp

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26

Norris, G., R. Siddharthan, Z. Zafir, S. Abdel-Ghaffar, and P. Gowda. "Soil-Foundation-Structure Behavior at the Oakland Outer Harbor Wharf." Transportation Research Record: Journal of the Transportation Research Board 1546, no. 1 (1996): 100–111. http://dx.doi.org/10.1177/0361198196154600112.

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The California Strong Motion Instrumentation Program's Loma Prieta records at Oakland Outer Harbor Wharf maybe used to study the free-field motions, the possible softening of soils surrounding the piles supporting the instrumented wharf, the determination of the motion on the instrumented wharf using free-field motion input and deflection-compatible lateral and vertical pile foundation stiffnesses, and conditions under which a soil-foundation interaction failure or structural failure of the batter piles might have developed.

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27

Isaacson, Michael, and Chung-Son Ryu. "Directional effects of earthquake-induced sloshing in rectangular tanks." Canadian Journal of Civil Engineering 25, no. 2 (1998): 376–82. http://dx.doi.org/10.1139/l97-088.

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The influence of the direction of earthquake motions on the hydrodynamic loads on a fluid-filled rectangular tank and on the associated amplitudes of the water surface elevation is investigated. A superposition of the closed-form solution for motion parallel to a pair of sides is used to develop analytical results for an arbitrary direction of motion. The resulting solution is used to examine the effects of motion direction on the maximum force on the tank for both harmonic and earthquake-induced motions. For a harmonic motion, the highest loads occur for a motion parallel to a pair of sides,

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28

An, Hyojoon, Jong-Han Lee, and Soobong Shin. "Dynamic Response Evaluation of Bridges Considering Aspect Ratio of Pier in Near-Fault and Far-Fault Ground Motions." Applied Sciences 10, no. 17 (2020): 6098. http://dx.doi.org/10.3390/app10176098.

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The recent increase in earthquake activities has highlighted the importance of predicting the seismic response of structures. Damage to civil infrastructure, particularly bridges, can cause considerable human and property losses. The seismic performance of a structure should be evaluated based on the characteristics of structures and earthquakes. For this, this study defined the two main factors of ground motion and structural system that affect the seismic response of a structure. Ground motions, which are mainly dependent on the distance from the epicenter, were defined as near-fault and far

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29

Stewart, Jonathan P., Norman A. Abrahamson, Gail M. Atkinson, et al. "Representation of Bidirectional Ground Motions for Design Spectra in Building Codes." Earthquake Spectra 27, no. 3 (2011): 927–37. http://dx.doi.org/10.1193/1.3608001.

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The 2009 NEHRP Provisions modified the definition of horizontal ground motion from the geometric mean of spectral accelerations for two components to the peak response of a single lumped mass oscillator regardless of direction. These maximum-direction (MD) ground motions operate under the assumption that the dynamic properties of the structure (e.g., stiffness, strength) are identical in all directions. This assumption may be true for some in-plan symmetric structures, however, the response of most structures is dominated by modes of vibration along specific axes (e.g., longitudinal and transv

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30

Lazaridis, Petros C., Ioannis E. Kavvadias, Konstantinos Demertzis, Lazaros Iliadis, and Lazaros K. Vasiliadis. "Structural Damage Prediction of a Reinforced Concrete Frame under Single and Multiple Seismic Events Using Machine Learning Algorithms." Applied Sciences 12, no. 8 (2022): 3845. http://dx.doi.org/10.3390/app12083845.

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Анотація:

Advanced machine learning algorithms have the potential to be successfully applied to many areas of system modelling. In the present study, the capability of ten machine learning algorithms to predict the structural damage of an 8-storey reinforced concrete frame building subjected to single and successive ground motions is examined. From this point of view, the initial damage state of the structural system, as well as 16 well-known ground motion intensity measures, are adopted as the features of the machine-learning algorithms that aim to predict the structural damage after each seismic event

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31

Wang, Jiajia, Wenfeng Jia, Fu Zhang, et al. "Study on the Structural Characteristics of Bird Necks and Their Static Motion Features in the Sagittal Plane." Coatings 11, no. 10 (2021): 1228. http://dx.doi.org/10.3390/coatings11101228.

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Анотація:

The necks of birds that possess complex structures, graceful curves, and flexible movements are perfect natural motion actuators. Studying their structural features, mechanic characteristics, and motion rules can provide valuable references for imitating such actuators and motion functions artificially. Previous studies have analyzed the influence of two-dimensional motion geometric features and anatomical structure of the neck on motion efficiency and motion stability. However, the mechanism of motion flexibility from the perspective of neck structure has not been investigated. This study inv

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32

Gong, L., and H. Hao. "Analysis of Coupled Lateral-Torsional-Pounding Responses of One-Storey Asymmetric Adjacent Structures Subjected to Bi-Directional Ground Motions Part I: Uniform Ground Motion Input." Advances in Structural Engineering 8, no. 5 (2005): 463–79. http://dx.doi.org/10.1260/136943305774858043.

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Анотація:

This paper presents results of a parametric study of seismic induced lateral-torsional-pounding responses of an asymmetric and a symmetric one-storey system subjected to bi-directional ground motion. The properties of the symmetric model are fixed, while the vibration frequency and eccentricity of the asymmetric model vary in the numerical computation. 20 sets of bi-directional horizontal earthquake ground motion time histories are numerically simulated for the analysis. All the simulated motions are compatible individually with the Newmark-Hall design response spectrum with 5% damping and nor

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33

Kim, Mun Sung, Kwang Hyo Jung, and Sung Boo Park. "WAVE INDUCED COUPLED MOTIONS AND STRUCTURAL LOADS BETWEEN TWO OFFSHORE FLOATING STRUCTURES IN WAVES." Brodogradnja 69, no. 3 (2018): 149–73. http://dx.doi.org/10.21278/brod69309.

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Анотація:

As oil or gas field moves deeper offshore area, offshore offloading operations such as Tandem or Side-by-Side arrangement between two floating structures take place in many locations throughout the world and also have many hydrodynamic problems. Therefore, the researches on the motion response and hydrodynamic force including first and second order between two floating structures are needed to have the more safe offloading operability in waves. In this paper, prediction of wave induced motion responses and structural loads at mid-ship section with hydrodynamic interaction effect between two of

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34

Sun, Pengyu, Weiping Wen, and Siwei Zhang. "Effects of Aftershocks on the Seismic Performances of Reinforced Concrete Eccentric Frame Structures." Applied Sciences 13, no. 19 (2023): 10767. http://dx.doi.org/10.3390/app131910767.

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Strong aftershocks have the potential to cause accumulated damage in structures, a feature which has been reported in post-earthquake reconnaissance studies, particularly for eccentric or irregular structures. This study aims to investigate the seismic behaviors of eccentric RC structural models under mainshock–aftershock (MSAS) sequences. In this study, three-dimensional structural models with eccentricities of 5%, 10%, 15%, 20%, 25%, and 30%, and an eccentricity of 0 (symmetric structural model) are developed by changing the positions of the centers of the structural mass. A static pushover

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35

Zhang, Yi, Wuchuan Pu, Qishuo Zhang, Kaiwen Liu, and Hua Dong. "Effect of Ground Motion Orientation on Seismic Responses of an Asymmetric Stress Ribbon Pedestrian Bridge." Advances in Civil Engineering 2022 (March 3, 2022): 1–12. http://dx.doi.org/10.1155/2022/1278314.

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The stress ribbon bridge uses ribbon in high tension to transfer loads and exhibits geometric nonlinearity under dynamic earthquake excitations. A typical double-span asymmetric stress ribbon pedestrian bridge was introduced as a prototype, and nonlinear time history analysis was performed to investigate the effect of ground motion orientation on the structural responses. Non-pulse-type and pulse-type ground motions were considered, and the influence of vertical ground motions was investigated. Numerical results showed that the stress ribbon bridge’s vertical and transverse displacements were

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36

Li, Chao, Hong Hao, Hongnan Li, and Kaiming Bi. "Seismic Fragility Analysis of Reinforced Concrete Bridges with Chloride Induced Corrosion Subjected to Spatially Varying Ground Motions." International Journal of Structural Stability and Dynamics 16, no. 05 (2016): 1550010. http://dx.doi.org/10.1142/s0219455415500108.

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This paper studies the time-dependent seismic fragility of reinforced concrete bridges with chloride induced corrosion under spatially varying ground motions. The time-varying characteristic of the chloride corrosion current density and the uncertainties related to the structural, material and corrosion parameters are both considered in the probabilistic finite element modeling of the example RC bridge at different time steps during its life-cycle. Spatially varying ground motions at different bridge supports are stochastically simulated and used as inputs in the fragility analysis. Seismic fr

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37

Chen, Ziwen, Xiaodong Wang, and Shun Kang. "Effect of the Coupled Pitch–Yaw Motion on the Unsteady Aerodynamic Performance and Structural Response of a Floating Offshore Wind Turbine." Processes 9, no. 2 (2021): 290. http://dx.doi.org/10.3390/pr9020290.

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The floating offshore wind turbines (FOWTs) have many more advantages than the onshore wind turbines, but they also have more complicated aerodynamic characteristics due to complex platform motions. The research objective of this paper is to investigate unsteady aerodynamic characteristics of a FOWT under the pitch, yaw, and coupled pitch–yaw platform motions using the computational fluid dynamics (CFD) method in the Unsteady Reynolds Averaged Navier-Stokes (URANS) simulations. The pitch, yaw, and coupled pitch–yaw motions are studied separately to analyze the platform motions’ effects on the

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38

Cao, Ning, Jinsheng Liu, Feiling Shen, Xuming Pei, Yupu Liu, and Hengyu Li. "Research on Modeling and Motion Optimization for an Underactuated Bionic Scorpion Robot Arm." Applied Bionics and Biomechanics 2024 (May 31, 2024): 1–15. http://dx.doi.org/10.1155/2024/9439878.

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Анотація:

Flexible screen possessing a high-contrast ratio to accomplish high-definition display can be attributed to the accuracy of polarizer assembly. Different from the existing polarizer attached onto a flexible screen, resulting in low-accuracy and nonalignment attaching behaviors, a unique approach of underactuated bionic scorpion robot arms can be developed to explore the stable capture and accurate alignment motion operations. Overall structure design and D–H kinematic simulation of bionic scorpion robot arm can be conducted to analyze virtual three-key typical motions. Motion optimization of s

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39

Dai, Minghui, and Yingmin Li. "Combination of Spectral Representation and Wavelet Packets for Generating Long-Period Ground Motions." Advances in Civil Engineering 2020 (May 31, 2020): 1–24. http://dx.doi.org/10.1155/2020/2381080.

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Анотація:

Far-field long-period ground motions (hereafter long-period ground motions) featuring low-frequency components are responsible for the resonant responses of high-rise buildings. In this context, it is beneficial to assess the dynamic performance of these buildings under long-period ground motions with the aid of time history analysis. This paper proposes a method for generating long-period motions by combining long-period components synthesized by spectral representation with high-frequency components simulated by wavelet packets. Later-arriving long-period surface waves (LALP surface waves),

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40

LORENCEAU, JEAN. "Motion Integration with Dot Patterns: Effects of Motion Noise and Structural Information." Vision Research 36, no. 21 (1996): 3415–27. http://dx.doi.org/10.1016/0042-6989(96)00086-7.

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41

Komatsu, A., and D. Isobe. "Motion Planning of Manipulators Using Structural Parameters." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2004 (2004): 89. http://dx.doi.org/10.1299/jsmermd.2004.89_2.

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42

OIKAWA, Tsutomu, Haru-Hisa Uchida, and Yoshitake NISHI. "2525 Structural Composite Materials with Bending Motion." Proceedings of the JSME annual meeting 2007.6 (2007): 251–52. http://dx.doi.org/10.1299/jsmemecjo.2007.6.0_251.

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43

Koike, Ryotaro, Kei Moritsugu, and Motonori Ota. "Description of Structural Changes by Motion Tree." Biophysical Journal 116, no. 3 (2019): 339a. http://dx.doi.org/10.1016/j.bpj.2018.11.1849.

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44

Yoon, Chiho, Changyeop Lee, Keecheol Shin, and Chulhong Kim. "Motion Compensation for 3D Multispectral Handheld Photoacoustic Imaging." Biosensors 12, no. 12 (2022): 1092. http://dx.doi.org/10.3390/bios12121092.

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Анотація:

Three-dimensional (3D) handheld photoacoustic (PA) and ultrasound (US) imaging performed using mechanical scanning are more useful than conventional 2D PA/US imaging for obtaining local volumetric information and reducing operator dependence. In particular, 3D multispectral PA imaging can capture vital functional information, such as hemoglobin concentrations and hemoglobin oxygen saturation (sO2), of epidermal, hemorrhagic, ischemic, and cancerous diseases. However, the accuracy of PA morphology and physiological parameters is hampered by motion artifacts during image acquisition. The aim of

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45

Ding, Yanqiong, Yazhou Xu, and Shuhang Ding. "A Stochastic Earthquake Ground Motion Database and Its Application in Seismic Analysis of an RC Frame-Shear Wall Structure." Buildings 13, no. 7 (2023): 1637. http://dx.doi.org/10.3390/buildings13071637.

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Анотація:

A stochastic earthquake ground motion database comprising twelve groups of simulated ground motions was introduced. Ground motions were generated using the stochastic semi-physical model of earthquake ground motions, based on a cluster analysis of 7778 recorded earthquake ground motion. All twelve groups of simulated earthquake ground motions were validated through the probability density evolution method (PDEM) by comparing their time histories and response spectra. As an application of the proposed database, an 18-story reinforced concrete (RC) frame-shear wall structure was analyzed using o

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46

Khatami, Seyed Mohammad, Hosein Naderpour, Rui Carneiro Barros, Anna Jakubczyk-Gałczyńska, and Robert Jankowski. "Determination of Peak Impact Force for Buildings Exposed to Structural Pounding during Earthquakes." Geosciences 10, no. 1 (2019): 18. http://dx.doi.org/10.3390/geosciences10010018.

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Structural pounding between adjacent, insufficiently separated buildings, or bridge segments, has been repeatedly observed during seismic excitations. Such earthquake-induced collisions may cause severe structural damage or even lead to the collapse of colliding structures. The aim of the present paper was to show the results of the study focused on determination of peak impact forces during collisions between buildings exposed to different seismic excitations. A set of different ground motion records, with various peak ground acceleration (PGA) values and frequency contents, were considered.

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47

Salazar, Ryan, Ryan Quintana, and Abdessattar Abdelkefi. "Role of Electromechanical Coupling, Locomotion Type and Damping on the Effectiveness of Fish-Like Robot Energy Harvesters." Energies 14, no. 3 (2021): 693. http://dx.doi.org/10.3390/en14030693.

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Анотація:

In this work, an investigation into the influence of prescribed motion on a body caudal fin aquatic unmanned vehicle (AUV) energy harvester is carried out. The undulatory–oscillation locomotion inspired by fishes actuates a composite beam representative of a spinal column with a piezoelectric patch. Two patch configurations—one at the head and tail—are considered for the AUV energy harvester, with a length that would not activate a harmonic in the system. An electromechanical model which accounts for the strain of the prescribed motion and the induced relative strain is developed. Discretizing

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48

Ciamarra, Massimo Pica, Raffaele Pastore, and Antonio Coniglio. "Particle jumps in structural glasses." Soft Matter 12, no. 2 (2016): 358–66. http://dx.doi.org/10.1039/c5sm01568e.

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49

López, Oscar A., Julio J. Hernández, Ricardo Bonilla, and Aura Fernández. "Response Spectra for Multicomponent Structural Analysis." Earthquake Spectra 22, no. 1 (2006): 85–113. http://dx.doi.org/10.1193/1.2162898.

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Анотація:

This paper aims to investigate the response spectra characteristics of the principal components of seismic motion, which are required for accurate multicomponent structural analysis. Mean spectra were determined for the three principal uncorrelated acceleration components for an ensemble of 97 earthquake records. The average inclination of the quasi-vertical component from the vertical axis is found to be 11.4°, with a standard deviation of 9.9°. The ratio of the minor and the major quasi-horizontal spectra varies between 0.63 and 0.81, which are lower than the value of 1 commonly used in desi

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50

Zhang, Yantai, Ruihan Shen, Baoyin Sun, Tingting Liu, Yongan Shi, and Luyao Li. "Selection of Ground Motion Intensity Measures in Fragility Analysis of a Mega-Scale Steel Frame Structure at Separate Limit States: A Case Study." Buildings 12, no. 10 (2022): 1530. http://dx.doi.org/10.3390/buildings12101530.

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Анотація:

Selecting an appropriate ground motion intensity measure (IM) to estimate the aleatory uncertainty produced by ground motion variability is the first and crucial step in fragility analysis. The choice of IM is influenced not only by the structural system type itself but also by the limit state of the structural damage. In this study, an investigation of the selection of IM in fragility analysis with respect to different limit states is developed for a 48-story mega-scale steel frame structure with buckling restrained braces. A comparative study of the efficiency of 27 IMs is conducted at four

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