Thematische Bibliographien / Lateral resistance coefficient

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Auswahl der wissenschaftlichen Literatur zum Thema „Lateral resistance coefficient“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 3. Februar 2022

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Zeitschriftenartikel zum Thema "Lateral resistance coefficient"

Yin, Ya Jun, Xue Wen Xie, and Yong Mei Qian. "The Research of Horizontal Resistance Coefficient of Pile Lateral Soil in Horizontal Loads." Applied Mechanics and Materials 501-504 (January 2014): 228–33. http://dx.doi.org/10.4028/www.scientific.net/amm.501-504.228.

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By finite element method and on the basis of measured data of horizontal static test of pile foundation, the article analyzed horizontal lateral resistance of pile lateral soil under the interaction of piles and soil and horizontal resistance coefficient of foundation soil. The results prove that weighting horizontal resistance coefficient ( m) of foundation soil and the displacement of pile top changed in the reduce of hyperbolic. Meanwhile, it indicates that the constraints of pile top can enhance pile horizontal resistance obviously.

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Griffiths, Terry, David J. White, Scott Draper, et al. "Lateral resistance of “rigid” pipelines and cables on rocky seabeds." Canadian Geotechnical Journal 56, no. 6 (2019): 823–39. http://dx.doi.org/10.1139/cgj-2018-0208.

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Accurate assessment of lateral resistance is critical to ensure the on-bottom stability and integrity of subsea pipelines and cables in the oil–gas and marine renewable energy industries. However, on rocky seabeds recommended practices provide limited recommendations on pipe–seabed interaction, suggesting only a single value for the friction coefficient of 0.6. This paper reports on a programme of physical experiments and theoretical modelling investigating the lateral resistance of pipes on rocky seabeds. It is shown that the peak and mean effective friction can significantly exceed the interface (or Coulomb) friction coefficient when the pipe diameter (D) is similar to the median rock diameter (dn50). Only when the pipe diameter becomes large compared to the rock size does the mean effective friction approach the interface friction. The effective friction coefficient was found to vary with variability in rock size and shape, as well as the length of pipe relative to median rock diameter. Each of these findings is reproduced well using the theoretical model. Collectively, the results demonstrate that the effective lateral friction coefficient may be higher than 0.6 for mean friction, and significantly higher for peak friction. This implies that inaccuracy may exist in current design, which may be rectified using the theoretical model.

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Kong, L. G., and L. M. Zhang. "Experimental study of interaction and coupling effects in pile groups subjected to torsion." Canadian Geotechnical Journal 45, no. 7 (2008): 1006–17. http://dx.doi.org/10.1139/t08-038.

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Piles in a pile group subjected to torsion simultaneously mobilize lateral and torsional resistances. Hence, complicated pile–soil–pile interaction effects and load deformation coupling effects occur in the pile group. In this study, a series of centrifuge model tests were carried out to investigate these effects in three-diameter spaced 1 × 2, 2 × 2, and 3 × 3 pile groups subjected to torsion in both loose and dense sands. The test results showed that the effect of horizontal movement of a pile on lateral behaviors of its adjacent piles is significant in 3 × 3 pile groups and such effect varies with group configuration and pile position. The p-multiplier concept can be used to quantify the effect and values for the p-multiplier are suggested. The effect of lateral movement of a pile on the torsional resistances of its adjacent piles and the effect of torsional movement of a pile on the lateral resistances of its adjacent piles were found to be minor in these tests. For an individual pile in a pile group subjected to torsion, the mobilized lateral resistance was found to substantially increase the torsional resistance of the pile. Such a coupling effect is quantified by a coupling coefficient, β, which describes the contribution of subgrade reaction to the increase of torsional shear resistance.

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Skvortsov, K. D., and A. I. Osokin. "Optimization of the formulaof the design resistance of soil." Вестник гражданских инженеров 17, no. 5 (2020): 117–22. http://dx.doi.org/10.23968/1999-5571-2020-17-5-117-122.

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The assumptions made in the derivation of the formula for the design soil resistance are considered. It is shown that in the conditions of the plane problem, taking into account the coefficient of lateral soil pressure leads to lower values of the initial critical load and, consequently, to a decrease in the design resistance. The equation of limiting equilibrium is implemented in the MathCad software package, which makes it possible to obtain isolines of deviation angles at any depth from the applied uniformly distributed load. To determine the initial critical load, a formula is given that takes into account the coefficient of lateral soil pressure K0. In the final part of the article, the solution to the problem is given according to the formula of N. P. Puzyrevsky and according to the formula derived by the author, taking into account K0, the difference in the isolines of the deflection angles is presented, and an analysis of a similar problem in the Plaxis 2D software package is carried out.

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Hosseini, Ahmad, and Morteza Esmaeili. "Effect of different contact surfaces between concrete sleeper and ballast on mobilized lateral resistance against impact loads." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 231, no. 6 (2016): 678–89. http://dx.doi.org/10.1177/0954409716636924.

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The amount of ballast particles surrounding a railway track significantly influences its resistance in all directions. As time goes by, with the development of high-speed trains, more attention has been paid to this issue owing to the increase in dynamic effects of rolling stock on track loading. The focus of the present study is on the investigation of the interaction between different surfaces (base, crib, and shoulder) of concrete sleeper and their adjacent ballast layer along with the related parameters under lateral impact loading condition. In this regard, by utilizing a pendulum loading test device, a number of lateral impact tests were conducted on an instrumented concrete sleeper in laboratory. On the basis of experimental results, the average contribution of base, crib, and shoulder zones in the total dynamic lateral resistance of sleeper was calculated as 48%, 23%, and 29%, respectively. Furthermore, in the lateral impact force domain of 13–28 kN, the sleeper–ballast dynamic friction coefficient at base and crib zones varied in the ranges 0.8–1.5 and 0.5–0.6. Moreover, a maximum impact factor of 2.5 was obtained for analysis and design purposes. It should be stated that the trend of laboratory results confirmed the common static friction coefficient of 0.8.

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Li, Feng, Shen Li, Guan Nan Wu, and Dong Wang. "Experimental Investigation on Four Types of Steel Plate Shear Walls." Applied Mechanics and Materials 166-169 (May 2012): 657–63. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.657.

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The overall seismic performance of steel plate shear walls, including unstiffened SPSW, cross-stiffened SPSW, and SPSW with opening, SPSW with slits and holes, under low cyclic loading were tested. Contrastive analyze their hysteretic curve, loading capacity, lateral stiffness, ductility and energy dissipation coefficient. Results indicate that the unstiffened SPSW seem to be with high resistance lateral stiffness and carrying capacity; however its hysteretic curve show pinch effect obviously. When cross-stiffener was set on unstiffened SPSW, the resistance lateral stiffness and loading capacity can be significantly improved. However, the pinch effect of hysteretic curve does not distinctly change. The resistance lateral stiffness and loading capacity of SPSW with holes and slits is lower, however hysteretic curve is full. In addition, the energy dissipation capacity and the phenomenon which the thin steel plate shear wall shows the zero stiffness even negative stiffness at the point of zero displacement under cyclic loading are dramatically improved.

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Shobolova, Т. А., S. V. Obolensky, and Yu А. Kabalnov. "RADIATION RESISTANT BIPOLAR SOI TRANSISTORS." Electronic engineering Series 2 Semiconductor devices 258, no. 3 (2020): 34–42. http://dx.doi.org/10.36845/2073-8250-2020-258-3-34-42.

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In this paper the new design of lateral bipolar transistors is presented, made on the basis of the charge carrier transport modeling. New design provides high level of base current transmission coefficient and enhanced radiation resistance. The manufacturing technology of the lateral bipolar transistors is compatible with a submicron SOI CMOS technology and can be of vital importance when developing RF analogue-to-digital microcircuits for ionizing radiation resistant satellite-navigation equipment.

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Yang, Yi Bo, Zhao Qiong Lai, Li Tao Ai, Wen Ying Guo, Hong Jian Huang, and Heng Chang Wang. "Experimental Research on the Evaluation Method of the Resistance to Chloride Ion Penetration of Autoclaved PHC Pile." Key Engineering Materials 629-630 (October 2014): 587–92. http://dx.doi.org/10.4028/www.scientific.net/kem.629-630.587.

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The usage of autoclaved PHC pile in chloride environment becomes common, so how to evaluate the resistance to chloride ion penetration of autoclaved PHC pile becomes urgent. This article Compare the resistance to chloride ion penetration of pile and pile concrete specimens based the Rapid Chloride Migration Synthesis Method and RCM. The results show that the Rapid Chloride Migration Synthesis Method is not suitable for pile, RCPT and RCM are suitable for pile; the resistance to chloride ion penetration of the pile inner and outer lateral concrete has a rather large different, so the sample must distinguish the direction when testing. Steel bar has little influence on the resistance to chloride ion penetration of autoclaved PHC pile, and the resistance to chloride ion penetration of pile outer lateral concrete is similar with pile concrete specimen, using pile concrete specimen to test the resistance to chloride ion penetration of autoclaved PHC pile is suitable. The chloride diffusion coefficient values have a good relationship with the electricity value, using the electricity value of square pile concrete specimen as commonly quality control way are suggested. The resistance to chloride ion penetration of pile can test the outer lateral concrete of pile or pile head, using the electricity value as daily quality control method and basis for project acceptance, and using RCM method as life assessment and basis for project acceptance.

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Luo, Guanwen, Leming Cheng, Liyao Li, Junfeng Wang, Xiaoguo Jiang, and Weiguo Zhang. "Effect of Connection Resistance between Cyclones and Backpass on Furnace Solids Suspension Density Profile and Circulation Rates in CFB." Energies 14, no. 19 (2021): 6162. http://dx.doi.org/10.3390/en14196162.

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The connection section between cyclones and backpass is an important configuration in multi-cyclone circulating fluidized bed boilers (CFB). In this work, the resistance coefficient of different connection modes, and connection resistance distribution from each cyclone outlet to backpass (connection branch) in one mode are defined and calculated, in order to investigate their effects on furnace solids suspension density distribution and circulation rates. Three connection modes with different overall resistance coefficients were tested experimentally and analyzed by a 1.5-dimensional model in a four-cyclone scaling CFB apparatus. Both experimental and theoretical results show that, with larger overall resistance of a connection, there are more solids suspended in the furnace bottom and fewer in the top section. The investigation of the C-type connection has revealed that when the branch resistance of the connection decreases from branch No. 1–4, the solids suspension density and circulation rate from corresponding solids recycle loops (No. 1–4) increase. Moreover, the non-uniformity of connection branch resistance distribution will lead to uneven lateral solids suspension density distribution and circulation rates allocation. This effect is enhanced by growing superficial velocity.

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Yeo, Na Eun, Doo-In Kim, and Myung Yung Jeong. "Compressive and Shear Resistances of Confined Water Droplet in Sliding Motion Against Hydrophobic Counterpart." Science of Advanced Materials 12, no. 4 (2020): 589–93. http://dx.doi.org/10.1166/sam.2020.3671.

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The compressive and shear resistances of the water droplet confined between the hydrophobic surfaces were investigated to evaluate the effect of the micro-scale surface pattern on the repulsive capillary force and friction of droplet. The hydrophobic surfaces covered with square pillar structures in the hexagonal array were prepared and the repulsive normal load and friction coefficient of the droplet were characterized. The force measurements in the vertical and lateral directions on the droplet confined between the prepared hydrophobic surfaces revealed that the compressive resistance to the vertical motion which is identical with the repulsive capillary force increases with deformation when the deformed droplet is horizontally symmetric. On the other hand, the friction coefficient of the squeezed droplet is inversely proportional to the repulsive capillary force. It was found that the reduced pressure acting on the solid–liquid interface results in the abnormal reduction in friction coefficient. In addition, the critical hydraulic pressure analysis confirmed that the partially wetted Cassie-Baxter (CB) state is maintained during sliding motion.

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