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Zou Yin-sheng

Bio: Zou Yin-sheng is an academic researcher from Hunan University. The author has contributed to research in topics: Seismic loading & Shear strength (soil). The author has an hindex of 2, co-authored 3 publications receiving 8 citations.

Papers
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Journal Article
Zou Yin-sheng1
TL;DR: In this paper, a direct shear test on red sand silty clay with various geosynthetics was carried out to investigate the strength and deformation performances, the influence of parameters such as reinforcement layers and modulus, soil compactness, as well as confining pressures of test.
Abstract: Red sand silty clay is used widely in highway engineering in Hunan Province. The direct shear tests on red sand silty clay with various geosynthetics were carried out to investigate the strength and deformation performances,the influence of parameters such as reinforcement layers and modulus,soil compactness,as well as confining pressures of test. Results show that with increasing compactness,the shear strength of soil increases significantly,but this is mainly caused by cohesive forces,which will disappear gradually with shear displacement increasing,and usually the stress-strain curve of red sand silty clay has a strain-softening phase. Reinforcement improves the stress-strain behaviors of red sand silty clay that both the peak strength and residual strength are increased,but the most important is the amount of reduction of residual strength,and the peak shear strength arrives at a larger shear displacement;as a result,the soil becomes more ductile. Based on the test results,the mechanism of the shear strength of reinforced soil is proposed tentatively;and the role and function of reinforcement in the stress-strain behaviors are also illustrated.

4 citations

Journal Article
Zou Yin-sheng1
TL;DR: In this paper, a numerical simulation study of reinforced retaining wall by ANSYS was conducted to investigate the influence of frequency content and the peak amplitude of the seismic load to the behavior of these structures under seismic load conditions, and some qualitative conclusions about their dynamic behavior were gained.
Abstract: Through considering reinforcement-soil and faceplate-soil and faceplate-faceplate contact elements,the finite element model of reinforced retaining walls including soil elements,contact elements,faceplate elements and reinforcement elements was established.The numerical simulation study of reinforced retaining wall by ANSYS was conducted to investigate the influence of frequency content and the peak amplitude of the seismic load to the behavior of these structures under seismic load conditions,and some qualitative conclusions about their dynamic behavior were gained.

3 citations

Journal Article
TL;DR: In this article, a simplified design method based on pushover analysis was developed for energy dissipation systems using viscous dampers, and the procedure needed to transform a multi-degree-of-freedom system into an equivalent single-degree of freedom system.
Abstract: A simplified design method based on pushover analysis was developed for energy dissipation systems using viscous dampers.The procedure needed to transform a multi-degree-of-freedom system into an equivalent single-degree-of-freedom system.For a given target roof displacement,the required supplemental damping to resist strong earthquakes could be solved directly,and the damper distribution pattern was also proposed.The procedure was applied to a 12-storey reinforced concrete frame for the verification of the proposed method.According to the earthquake time history analysis results,satisfactory accuracy can be achieved for low-and medium-rise structures in which the pushover analysis can be applied.

2 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, a large-scale field shear test on ten specimens of the red-sandstone embankment at a highway in Hunan, China, was performed to examine mechanical characteristics and parameters of red sandstone.
Abstract: Large-scale field shear tests on ten specimens of the red-sandstone embankment at a highway in Hunan, China, were performed to examine mechanical characteristics and parameters of red-sandstone. The curves of thrust-displacement, failure mode, and shear strength parameters for red-sandstone with different water contents, different compactions, and different grain size distributions were obtained from the tests. A practical procedure of in-situ test for red-sandstone embankment was proposed to normalize the test equipment and test steps. Based on three-dimensional thrust-sliding limit equilibrium method, the formulas for calculating strength parameters of red-sandstone considering three-dimensional sliding surface were inferred. The results show that red-sandstone has typical complete curves of stress-strain, strain softening, which are caused by the special structure of red-sandstone; water content and compaction are important factors for strength and failure mode of red-sandstone; The average value of cohesion and internal friction angle of the specimens calculated by three-dimensional technique are 21.56 kPa and 29.29°, respectively, and those by traditional two-dimensional method are 25.52 kPa and 33.76°, respectively.

9 citations

Proceedings ArticleDOI
11 May 2010
TL;DR: In this article, a series of laboratory triaxial compression tests on red-sandstone reinforced with hexagonal wire mesh inclusions were carried out to study the mechanical properties of this composite reinforced soil.
Abstract: Red-sandstone reinforced with hexagonal wire mesh is a new concept of composite reinforced soil. In order to study the mechanical properties of this composite reinforced soil, a series of laboratory triaxial compression tests on specimens reinforced with hexagonal wire mesh were carried out. 3D finite element method was introduced to simulate the triaxial tests. The macro stress-strain relation of the red-sandstone specimens reinforced with hexagonal wire mesh inclusions was reproduced and verified by 3D finite element model. The results indicate: finite element method is a ideal technique to study the mechanical characteristics of composite reinforced materials. The peak strength of red-sandstone are increased by hexagonal wire mesh reinforcements, and the peak shear strength arrives at a larger shear displacement than the plain red-sandstone specimen.

3 citations

Journal ArticleDOI
TL;DR: In order to investigate the weathering characteristics of Tertiary silty mudstone along Chengnan Freeway, the experiment of the engineering characteristics, weathering durability, and weathering speed was conducted.
Abstract: In order to research the weathering characteristics of Tertiary silty Mudstone along Chengnan Freeway, the experiment of the engineering characteristics, the weathering durability, the weathering speed to be done for the different weathering degree silty mudstone. The test result show that when the weathering degree of the rock mass deepen, the content of clay minerals in the rock mass is increase, the activity chemical composition in the rock mass is decrease relatively, the dry density of the silty mudstone is decrease, the total porosity and the water absorption of the silty mudstone is increase, the mechanical properties is weak, the rock mass is soften and collapse easily. The weathering speed of the rock mass with the relevant to the weathering degree and the exposed area of the rock mass.

2 citations

Journal ArticleDOI
TL;DR: The results show that reinforced by geogrid the lateral displacement of the foundation can be controlled effectively with little effect on the vertical displacement, and with lateral displaced of slope side becoming smaller with increase of the reinforced modulus, the reinforcement effect can be improved.
Abstract: In order to appraise the effect on which geotechnical reinforce soft soil foundation, based on a finite element model of reinforced embankment on soft ground, the stability of soft foundation with step loading during the construction of subgrade was studied, and the influencing factors of reinforced effect were analyzed. The results show that reinforced by geogrid the lateral displacement of the foundation can be controlled effectively with little effect on the vertical displacement; with the increase of the embankment fill, the tension of geogrid is gradually increasing, and its peak is gradually moving to the middle line of subgrade; multi-layers geogrid is better, the effect of 2 layers geogrid is significantly better than 1 layer, the effect of 4 layers is not obvious compared with 2 layers; the closer the reinforcing position is to the ground, the better the effect; with lateral displacement of slope side becoming smaller with increase of the reinforced modulus, the reinforcement effect can be improved.

2 citations

Journal Article
TL;DR: The best optimization scheme is obtained and the rules for optimal location of viscous dampers in large-span truss structures are summarized through taking safety and economy into account, which is of reference significance for the actual engineering damping design.
Abstract: In order to optimize the location and quantity of viscous dampers on the large-span truss structure, the maximum value is obtained by summing the percentage of modal strain energy of replacement bars, and thus taken as the objective function. The peak values of node displacement, acceleration and element stress are regarded as the optimization control index. In addition, Matlab is adopted to verify an adaptive genetic algorithm optimization program. Based on the optimization result, the seismic control effect of the optimized truss structure under the frequent and rare seismic is compared through ANSYS analysis. The results show that the optimized scheme of damper has superior damping effect, which can obviously improve the stress situation of structure. Therefore, the best optimization scheme is obtained and the rules for optimal location of viscous dampers in large-span truss structures are summarized through taking safety and economy into account, which is of reference significance for the actual engineering damping design. Keywords: large-span truss structure, viscous dampers, genetic algorithm, damping behavior

2 citations