Influence of Sediments Characteristics on Seismic Response of Concrete Dams

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.368-370.1374 ◽

2013 ◽

Vol 368-370 ◽

pp. 1374-1378

Author(s):

Yi Zhi Yan ◽

Zhi Min Su

Keyword(s):

Seismic Response ◽

Pressure Wave ◽

Friction Angle ◽

Response Magnitude ◽

Concrete Dams ◽

Two Phase ◽

Concrete Dam ◽

Consolidation Theory ◽

Phase Medium

To solve the problem of sediments on seismic response of concrete dams, pressure wave formula of saturated porous fluid-solid two-phase medium was derived from the Biots consolidation theory, and was determined the seismic response magnitude of sediment on concrete dam. Sediment was regarded as elastic-plasticity. And the method was applied to analyze the influence of sediments density, cohesion and friction angle on dam seismic response. Finally, a typical example is analyzed. The result shows sediments plasticity is relatively obvious on dam seismic response.

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Study of Elastic-Plastic Sediments on Seismic Response of Concrete Dams

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.275-277.1451 ◽

2013 ◽

Vol 275-277 ◽

pp. 1451-1455 ◽

Cited By ~ 1

Author(s):

Yi Zhi Yan ◽

Jian Fei Xiao ◽

Zhi Min Su

Keyword(s):

Seismic Response ◽

Pressure Wave ◽

Friction Angle ◽

Response Magnitude ◽

Concrete Dams ◽

Two Phase ◽

Concrete Dam ◽

Consolidation Theory ◽

Phase Medium ◽

Biot’S Consolidation

To solve the problem of sediments on seismic response of concrete dams, pressure wave formula of saturated porous fluid-solid two-phase medium was derived from the Biot’s consolidation theory, and was determined the seismic response magnitude of sediment on concrete dam. Sediment was regarded as elastic-plasticity. And the method was applied to analyze the influence of sediments density, cohesion and friction angle on dam seismic response. Finally, a typical example is analyzed. The result shows sediments are significant on dam seismic response.

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Analysis of Porous Media Sediments on Seismic Response of Concrete Dams

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.631-632.576 ◽

2013 ◽

Vol 631-632 ◽

pp. 576-583 ◽

Cited By ~ 1

Author(s):

Yi Zhi Yan ◽

Zhi Min Su

Keyword(s):

Porous Media ◽

Seismic Response ◽

Pressure Wave ◽

Response Magnitude ◽

Concrete Dams ◽

Two Phase ◽

Concrete Dam ◽

Consolidation Theory ◽

Phase Medium

To solve the problem of sediments on seismic response of concrete dams, pressure wave formula of saturated porous fluid-solid two-phase medium was derived from the Bait’s consolidation theory, and was determined the seismic response magnitude of sediment on concrete dam. The method was applied to analyze the influence of sediments thickness and permeability on hydrodynamic pressures. Finally, a typical example is analyzed. The result shows sediments are able to decrease hydrodynamic pressures.

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Research on Influence of Sediments Mechanical Parameters of Seismic Arch Dams

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.594-597.1998 ◽

2012 ◽

Vol 594-597 ◽

pp. 1998-2002

Author(s):

Yi Zhi Yan ◽

Zhi Min Su ◽

Liang Wu

Keyword(s):

Seismic Response ◽

Pressure Wave ◽

Friction Angle ◽

Arch Dam ◽

Response Magnitude ◽

Mechanical Parameters ◽

Two Phase ◽

Arch Dams ◽

Consolidation Theory ◽

Phase Medium

The problem of sediments on seismic response of arch dams was not solved. Thus pressure wave formula of saturated porous fluid-solid two-phase medium was applied from the Bait’s consolidation theory, and was determined the seismic response magnitude of sediment on arch dam. And the method was applied to analyze the influence of sediments thickness, cohesion and friction angle on dam seismic response. The result shows sediments is relatively obvious on arch dam seismic response.

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Analysis the Influence of Layered Sediment on Seismic Responses of Concrete Dam

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.838-841.1733 ◽

2013 ◽

Vol 838-841 ◽

pp. 1733-1737

Author(s):

Chang Xin Xiong ◽

Yi Zhi Yan

Keyword(s):

Wave Equation ◽

Physical Properties ◽

Seismic Response ◽

Pressure Wave ◽

Solid Medium ◽

Response Magnitude ◽

Physical Parameters ◽

Sediment Thickness ◽

Concrete Dam ◽

Distribution Form

Studied a certain thickness layered sediment of different distribution form for the seismic response of a concrete dam, Based on pressure wave equation of saturated porous fluid-solid medium, the layers of sediment thickness is different, divided the layered sediment into three different distribution forms, the physical parameters of each layered sediment divided into the same and the different two situations, prediction the seismic response magnitude of concrete dam. Application of the method of a typical example shows the influence on the same physical properties different forms of response to the seismic response was not significant, the distribution of different forms of seismic response shows a significant effected. solid medium, the layers of sediment thickness is different, divided the layered sediment into three different distribution forms, the physical parameters of each layered sediment divided into the same and the different two situations, prediction the seismic response magnitude of concrete dam. Application of the method of a typical example shows the influence on the same physical properties different forms of response to the seismic response was not significant, the distribution of different forms of seismic response shows a significant effected.

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Analysis of the Foundation Slab Settlement of the “Africa Pavilion” Facility in Wrocław

Studia Geotechnica et Mechanica ◽

10.1515/sgem-2015-0044 ◽

2015 ◽

Vol 37 (4) ◽

pp. 47-55

Author(s):

Eugeniusz Sawicki ◽

Tomasz Strzelecki

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Numerical Calculations ◽

Soil Consolidation ◽

The Finite Element Method ◽

Two Phase ◽

Foundation Slab ◽

Consolidation Theory ◽

Phase Medium ◽

Biot’S Consolidation

Abstract This article presents the results of numerical calculations of soil consolidation underneath the “Africa Pavilion” structure in Wrocław Zoo, Poland. To determine the deformations of the baseplate of the “Africa Pavilion” and deformations of the subsoil, Biot’s consolidation theory for two-phase medium was applied. The calculations were carried out using the professional program FlexPDE v.6, which is based on the Finite Element Method. Numerical calculations performed were used to evaluate the design assumptions allowing for the laying of hydraulic conduits under the slab.

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SYNTHESIS OF HYDROGEN IN ACOUSTOPLASMA DISCHARGE IN A LIQUID-PHASE STREAM

Alternative Energy and Ecology (ISJAEE) ◽

10.15518/isjaee.2019.01-03.042-048 ◽

2019 ◽

pp. 42-48 ◽

Cited By ~ 2

Author(s):

N. A. Bulychev

Keyword(s):

Liquid Phase ◽

Organic Compounds ◽

Electrode Materials ◽

Solid Phase ◽

Plasma Discharge ◽

Raw Material ◽

Two Phase ◽

Reduced Pressure ◽

External Power Source ◽

Phase Medium

In this paper, the plasma discharge in a high-pressure fluid stream in order to produce gaseous hydrogen was studied. Methods and equipment have been developed for the excitation of a plasma discharge in a stream of liquid medium. The fluid flow under excessive pressure is directed to a hydrodynamic emitter located at the reactor inlet where a supersonic two-phase vapor-liquid flow under reduced pressure is formed in the liquid due to the pressure drop and decrease in the flow enthalpy. Electrodes are located in the reactor where an electric field is created using an external power source (the strength of the field exceeds the breakdown threshold of this two-phase medium) leading to theinitiation of a low-temperature glow quasi-stationary plasma discharge.A theoretical estimation of the parameters of this type of discharge has been carried out. It is shown that the lowtemperature plasma initiated under the flow conditions of a liquid-phase medium in the discharge gap between the electrodes can effectively decompose the hydrogen-containing molecules of organic compounds in a liquid with the formation of gaseous products where the content of hydrogen is more than 90%. In the process simulation, theoretical calculations of the voltage and discharge current were also made which are in good agreement with the experimental data. The reaction unit used in the experiments was of a volume of 50 ml and reaction capacity appeared to be about 1.5 liters of hydrogen per minute when using a mixture of oxygen-containing organic compounds as a raw material. During their decomposition in plasma, solid-phase products are also formed in insignificant amounts: carbon nanoparticles and oxide nanoparticles of discharge electrode materials.

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Some 1-substitution derivatives of 4-aryl-2,3-dihalogeno-1-naphthols

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19840110 ◽

1984 ◽

Vol 49 (1) ◽

pp. 110-121 ◽

Cited By ~ 1

Author(s):

Jiří Křepelka ◽

Drahuše Vlčková ◽

Milan Mělka

Keyword(s):

Thionyl Chloride ◽

Oxirane Ring ◽

Secondary Amines ◽

Two Phase ◽

Lytic Effect ◽

Primary And Secondary Amines ◽

Phase Medium ◽

Chloro Derivatives ◽

Derivatives Of

Alkylation of derivatives of 4-aryl-1-naphthols (I-V) by 2,3-epoxypropyl chloride in methanolic sodium hydroxide gave epoxy derivatives VI, VIII, IX, XI and XII, apart from products of cleavage of the oxirane ring, VII and X. Analogous alkylation of compounds I, IV and V by 2-(N,N-diethylamino)ethyl chloride hydrochloride in a two-phase medium afforded basic ethers XIII to XV. The cleavage of the oxirane ring in compound VI by the action of primary and secondary amines, piperidine and substituted piperazines led to compounds XVI-XXIV. Reaction of thionyl chloride with compounds XXI, XXII and XXIV gave chloro derivatives XXV-XXVII.Exposure of compound XXII to 4-methylbenzenesulfonyl chloride produced compound XXVIII, retaining the secondary alcoholic group. In an antineoplastic screening in vivo none of the compounds prepared had an appreciable activity. Compound XVII, being an analogue of propranolol, was used in the test of isoproterenolic tachycardia, and showed a beta-lytic effect comparable with that of propranol.

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