Wuhan Construction Engineering Group Co.

Wuhan, China

Wuhan Construction Engineering Group Co.

Wuhan, China
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Gao W.,Hubei Engineering University | Wang L.,Wuhan Construction Engineering Group Co. | Yang D.,Changjiang Geotechnical Engineering Co.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2011

Rock is a kind of natural engineering material with genetic defects. For the complexity of its mechanical property, the mature model to describe rock damage process is not yet established. To solve this problem, from the basic isotropic damage, based on strain equivalent principle and least energy consumption principle, one novel damage evolutionary model of the rock from the energy principle is developed. From analysis the whole test process of granite block from meso-damage to macro fracture, the damage evolutionary model of granite is obtained based on energy principle. Compared to the computing results of traditional Marzars damage model, we can find that the new damage model proposed here can reflect the rock damage process more reliably, and coincide with the real fracture process of rock test very well.


Gao W.,Wuhan University | Wang L.,Wuhan Construction Engineering Group Co. | Yang D.,Changjiang Geotechnical Engineering Co.
Applied Mechanics and Materials | Year: 2011

For the damage process of rock is a kind of energy-consuming process in nature, it should conform to the least energy consumption principle. Here, a new damage evolution model based on the least energy consumption principle is proposed. With real experiments of granite specimens, the new model is verified. It can be seen that, the stress-strain curves (part before the peak) of the theoretical curve is coincided with the test curve well. So, this new method is suitable to describe the evolution process of rock damage. © (2011) Trans Tech Publications.


Gao W.,Wuhan University | Zhang L.-Y.,The 9th General Team of Airport Construction of China | Zhang F.-J.,Wuhan Construction Engineering Group Co.
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2012

Critical slip surface searching is vital to slope stability analysis. Essentially, this is a path searching problem, which can be solved by the ant colony optimization method. To overcome the shortcomings of traditional ant colony optimization, the premium-penalty strategy is introduced, and the pheromone diversity of the good paths and the ordinary ones is increased to polarize pheromone density of all paths. Thus, a new algorithm namely Premium-Penalty Ant Colony Optimization is proposed to discrete and simulate the problem of the critical slip surface searching, by which the critical slip surface of slope can be located. Through two typical examples, one with simple slope and the other with complicated slope, and an application example of a slope project of a dam, the efficiency and effectiveness of the new algorithm are verified. The results show that, not only for simple slope but also for complicated slope, the new algorithm can always find the better critical slip surface in shorter time than many previous algorithms, and the new algorithm can be used in engineering practice very well.


Gao W.,Wuhan University | Wang L.,Wuhan Construction Engineering Group Co. | Yang D.,Changjiang Geotechnical Engineering Co.
Advanced Science Letters | Year: 2012

For the damage process of rock is a kind of energy-consuming process in nature, it should conform to the least energy consumption principle. Here, a new damage evolution model based on the least energy consumption principle is proposed. With the real experiments of granite specimens, the new model is verified. It can be seen that, the stress-strain curves (part before the peak) of the theoretical model is coincided with the test curve well. The new damage evolution equation is a better reflection on rock damage process, and the obtained critical damage value is more precise than that of classical Marzars theory. So, this new method is suitable to describe the evolution process of rock damage. © 2012 American Scientific Publishers. All rights reserved.


Gao W.,Hubei Engineering University | Zhang F.-J.,Wuhan Construction Engineering Group Co.
Baozha Yu Chongji/Explosion and Shock Waves | Year: 2012

To improve the computing efficiency of the traditional ant colony clustering algorithm, from data combination mechanism, an abstraction ant colony clustering algorithm was proposed. By analyzing the data of rock burst samples, from the engineering analogy thinking by the abstraction ant colony clustering algorithm, a new method for forecasting of rock burst in deep underground engineering was given. Some rock burst engineering applications of deep mines prove that compared with traditional ant colony clustering algorithm, for similar computing difficulty and complexity, the validity of the new algorithm whose accuracy is 92%, is higher, and the computing velocity can increase 40%. So the abstraction ant colony clustering algorithm is practical for rock burst forecasting.


Xia Y.,Wuhan University of Technology | Lin M.,Wuhan University of Technology | Liao L.,Wuhan University of Technology | Xiong W.,Wuhan Construction Engineering Group Co. | Wang Z.,Wuhan University of Technology
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2014

Rockburst tests on specimens of large-diameter using the device developed were carried out under different loading and unloading conditions. The weight distribution and the fractal characteristics of rock fragments after rockburst, and the relationship between the rockburst intensity and the fractal characteristics were studied. The fragments from specimens of large-diameter after each test were found to have different shapes and quantities. The fragments from specimens of large-diameter have fractal characteristics. The fractal dimension of fragments from the unloading tests of low confining pressure is larger than that of high confining pressure. Accordingly, the dissipation energy required is comparatively smaller and the intensity of rockburst produced is relatively smaller. The range of rockburst decreases as the increasing of the loading rate if the confining pressure is the same. The number of fragments of large size is small if the vertical loading is small, while the fractal dimension is larger.


Lin M.-Q.,Wuhan University of Technology | Xia Y.-Y.,Wuhan University of Technology | Xiao Z.-X.,Southwest University of Science and Technology | Wang Z.-D.,Wuhan University of Technology | And 2 more authors.
Yantu Lixue/Rock and Soil Mechanics | Year: 2012

Penetration process of projectile penetration high strength concrete target with different penetrating angles is captured in the light gas gun by using the high-speed photography. And the motion feature of projectile affected by the penetrating angle and penetrating velocity is analyzed. The result shows that projectile has a horizontal movement as the striking angle is 0 degree, while it deflected after 150-200 μs as the striking angle of target more than 0 degree and the projectile in a lower penetration velocity around 200 m/s. There is a positive correlation between the level penetrating velocity, deflection angle and its time. The penetrating time of projectile in horizontal movement and the spatter velocity decreased mainly affected by the decrease of penetrating velocity of projectile at a certain penetrating angle. The influence of penetrating angle on spatter velocity and projectile horizontal penetration time is relatively larger than that of the penetrating velocity of projectile. It is proved that the size of penetrating angle is important and unavoidable in security protection fornications.


Gao W.,Hohai University | Zhang F.-J.,Wuhan Construction Engineering Group Co.
Yantu Lixue/Rock and Soil Mechanics | Year: 2014

The search of non-circular critical slip surface is a key problem in slope stability analysis. Essentially, this problem is a path search problem; so the ant colony algorithm is a very suitable method to solve this problem. To overcome the shortcomings of traditional ant colony algorithm, from the principle of combing one whole road by forward and reverse search of ants, here a new algorithm, meeting ant colony algorithm, is proposed. And then this meeting ant colony algorithm is used to locate the critical slip surface of slopes. Through two typical examples and an engineering application of a reservoir bank slope, the effectiveness of the new algorithm is verified. The results show that, from not only the whole search scope but also one point search scope, the meeting ant colony algorithm are all better than traditional ant colony algorithm; so the solutions diversity to search the critical slip surface of slopes by meeting ant colony algorithm is better. And then, to meeting ant colony algorithm, the global optimal solution can be included in the search scope by the larger probability; and the global optimal solution can be obtained by the larger probability. At last, by meeting ant colony algorithm, the critical slip surface of slopes can be found on larger scope and by larger speed.


Lin M.-Q.,Wuhan Institute of Technology | Lin M.-Q.,Wuhan University of Technology | Xia Y.-Y.,Wuhan University of Technology | Liao L.-L.,Wuhan University of Technology | Xiong W.,Wuhan Construction Engineering Group Co.
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2014

To study the rock burst mechanism under different stress circumstances and the effect of rock burst on rock internal damage characteristics, the rock burst experiments of specimen under different stresses were conducted by using the independent research and development rock burst experimental device, as the same time, the acoustic test and elastic wave CT technology applied before and after experiment. The experimental results showed that internal damage characteristic of the specimen before and after experiment could reflect directly by using the elastic wave CT imaging, and the loading paths had the major impact on failure characteristic and internal damage characteristic. The expansion phenomenon near the loading surface obviously presented on the specimen like cavity 'V' under the higher unloading pressure stress condition, while, it obviously presented spelling under the lower condition. The internal specimen has larger degree of damage at the higher unloading condition than that at lower unloading. ©, 2015, Wuhan University of Technology. All right reserved.

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