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Huang X.,Central South University | Huang X.,Hunan Provincial Communications Planning Survey and Design Institute | Xu G.,Central South University | Xu G.,Henan Institute of Engineering | Chen R.,Maccaferri Enviro Technology Co.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010

According to the first expressway reinforced gabion retaining structure in China(reinforced earth engineering of Daqing-Guangzhou expressway section of Lanxi interchange AK0+939.38-AK1+079.71, BK0+296.55-366.18 in Hubei Province), the stability of steep reinforced gabion slope is evaluated by using strength reduction finite element method(FEM) on the platform of the finite element software Phase2 V6.0. Based on the results of limit equilibrium slice method, the effect of selected element on the results of strength reduction method is analyzed. A new method to determine the internal failure surface of reinforced earth structure by using FEM to calculate tension distribution of reinforcements is proposed. The influences of cohesion, internal friction angle, tension, earthquake force, gravity density and vehicle load on factor of safety are discussed. Thus, it can be effectively used to guide the specific engineering designs.


Zhang Y.,Nanjing Forestry University | Zhang Y.,Changsha University of Science and Technology | Bai S.,Hunan Provincial Communications Planning Survey and Design Institute | Yang Y.,Hunan Architecture Senior Technical School | Zhang X.,Central South University
Advances in Cement Research | Year: 2016

This paper presents a scheme of double-plane shear testing to investigate the shear transmission mechanism of strain-hardening cementitious composite (SHCC) after crack opening; the focus is on the shear stress transfer behaviour on the crack surface of the SHCC, contributed by both the contact effect of the matrix and the fibre bridging effect on the crack surface. The experimental results demonstrate that the transferred shear stress on the crack surface of the SHCC is contributed by both the contact effect of the matrix and the fibre bridging effect on the crack surface until peak shear stress, whereas after the separation of the crack surfaces, it is influenced solely by the fibre bridging effect. It is confirmed that the fibre bridging effect on the crack surface of SHCC has considerable influence in the shear fracture behaviour of SHCC. © 2016, ICE Publishing. All rights reserved.


Zhang Y.,Nanjing Southeast University | Zhang Y.,Nanjing Forestry University | Zhang Y.,Changsha University | Bai S.,Hunan Provincial Communications Planning Survey and Design Institute | Zhang Q.,Changsha University
Advances in Cement Research | Year: 2016

Strain-hardening cementitious composites (SHCCs) are an attractive construction material, due to their obvious advantage of large tensile strain capacity with pseudo strain-hardening, whereas this advantage is obviously reduced when SHCC is used for RC strengthening. This study investigated, experimentally and numerically, the localised behaviour of SHCCs for RC strengthening, with a focus on crack elongation performance and the ductility reduction of SHCC for RC strengthening. The numerical investigation was implemented using a proposed scheme that considers the localised behaviour of SHCCs for strengthening RC structures with cracks. The effectiveness of the numerical scheme was confirmed through a comparison of experimental and numerical results. © 2016, ICE Publishing. All rights reserved.


Huang X.,Central South University | Huang X.,Hunan Provincial Communications Planning Survey and Design Institute | Jiang J.,Hunan City University
2010 International Conference on Intelligent Computation Technology and Automation, ICICTA 2010 | Year: 2010

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. © 2010 IEEE.


Yin P.-B.,Changsha University of Science and Technology | Yin P.-B.,Changsha University | He W.,Changsha University of Science and Technology | Cheng Y.,Hunan Provincial Communications Planning Survey and Design Institute | And 2 more authors.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2015

The displacement and the relevant reliability of a pile beneath column-supported bridge are investigated. Firstly, the bearing characteristics of the bridge pile in mountainous area are analyzed, and its differential equations are established and solved, by which the internal force and displacement along the pile shaft are obtained. Secondly, the main influence factors for the horizontal displacement are analyzed. Based on the displacement distribution solved by the limit state equations, the reliability index and failure probability indexes are solved by the checking point method. Finally, an real case of a bridge pile is analyzed by the proposed method, and the results agree well with those of the improved response surface method and Monte Carlo method. ©, 2015, Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering. All right reserved.

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