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Shan M.,Guangxi Hualan design group co. | Yang B.,Guangxi University | Yang B.,Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education | Yang B.,Guangxi Key Laboratory of Disaster Prevention and Engineering Safety | And 2 more authors.
Advanced Materials Research | Year: 2013

The cone dynamic penetration test is a kind of test method, which has the features of simple device, easy operation, great adaptability, high efficiency and it also is a continuous in-situ test method. But in the common geotechnical exploration activities, we found that bearing capacity of foundation is always larger than the measured value, by analysis to the blow count of cone dynamic penetration in the standard table. This article set the gravel soil geotechnical exploration of Guangxi province's city planning exhibition center of China as the example, to start with the theory of cone dynamic penetration, and analysis the reason why there are the abnormal value in the dynamic penetration, furthermore, provide the relative error correction models for it. Finally, establish the rational relationship between dynamic penetration results and foundation soil mechanical parameters. © (2013) Trans Tech Publications, Switzerland. Source


Yang B.,Guangxi University | Yang B.,Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education | Yang B.,Guangxi Key Laboratory of Disaster Prevention and Engineering Safety | Wang J.,Guangxi University | And 4 more authors.
Applied Mechanics and Materials | Year: 2013

Small sized specimen of cement concrete pavement structure was prepared indoors. By utilizing the dynamic signal tester and obtaining the vibration frequency domain signals through the falling-ball vibration impact test method, the attenuation rules of the vibration response of the pavement structure were analyzed and the effects of the flexible functional layer on the vibration-reduction and energy-absorption were studied. The results showed that, after compared with the normal flexible functional layer, the flexible functional layer incorporated with rubber powder resulted in the pavement structure having the better capacities of vibration-reduction energy-absorption and impact resistance. Accordingly, the rupture failure of the cement concrete pavement induced by vehicle load can be reduced. © (2013) Trans Tech Publications, Switzerland. Source


Yang B.,Guangxi University | Yang B.,Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education | Yang B.,Guangxi Key Laboratory of Disaster Prevention and Engineering Safety | Liang P.,Guangxi University | And 2 more authors.
Materials Research Innovations | Year: 2014

In this paper, mechanical properties of large size modified asphalt mixture AM-25 with multipore were investigated. Rutting test, split test and bending test of small beam were performed on asphalt mixture with different contents of rock asphalt, lake asphalt and rubber powder respectively. It was demonstrated that the dynamic stability, splitting tensile strength and bending tensile strength of the modified asphalt mixture AM-25 increase with the increasing content of the three modifiers. By comprehensive comparison, the rock asphalt modified mixture had the most excellent mechanical properties, followed by the lake asphalt modified mixture, while the rubber powder modified mixture had relatively poor mechanical properties. © 2014 W. S. Maney & Son Ltd. Source


Chen Z.-P.,Guangxi University | Chen Z.-P.,Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education | Li L.,Guangxi University | Chen Y.-L.,Guangxi University | Ying W.-D.,Guangxi University
Gongcheng Lixue/Engineering Mechanics | Year: 2015

In order to study the mechanical behaviors of recycled coarse aggregate concrete under tri-axial compression, 36 cylinder specimens were designed for conventional tri-axial tests, and two parameters were considered in the tests, namely the replacement ratio of recycled coarse aggregate and lateral confinement. The failure patterns of the specimens were observed, and the stress-strain curve and characteristic parameters (such as peak stress and peak strain) were obtained by the test. Based on the test data, the influence of the replacement ratio and lateral confinement on tri-axial compression mechanical performance was analyzed, and some formulae for initial elastic modulus, vertical peak stress and peak strain in different confinement value were put forward. The experimental study shows that the replacement ratio of recycled aggregate concrete has little influence on the peak stress and peak strain in tri-axial compression, but has great influence on initial elastic modulus. Compared with natural concrete, peak stress variation range is about 5%, peak strain variation range is about 2%, and the elastic modulus increased about 20%. Lateral confinement value significantly impacts the technical specifications of the recycled concrete under tri-axial compression, and increasing lateral confinement value can effectively improve the elastic modulus, bearing capacity, and deformation performance of recycled concrete. ©, 2015, Tsinghua University. All right reserved. Source


Yang B.,Guangxi University | Yang B.,Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education | Yang B.,Guangxi Key Laboratory of Disaster Prevention and Engineering Safety | Mo S.,Guangxi University | And 2 more authors.
Advances in Applied Mathematics and Mechanics | Year: 2013

This paper presents a physical investigation and mathematical analysis on mechanical behavior of the regular jugged discontinuity. In particular, we focus on the creep property of structural plane with various slope angles under different normal stress through shear creep tests of structural plane under shear stresses. According to the test results, the shear creep property of structural plane was described and the creep velocity and long-term strength of the structural plane during shear creep were also investigated. An empirical formula is finally established to evaluate shear strength of discontinuity and a modified Burger model was proposed to represent the shear deformation property during creep. © 2013 Global Science Press. Source

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