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Geng B.L.,Transportation Institute | Zheng X.,China Harbour Engineering Company Ltd
Applied Mechanics and Materials | Year: 2013

By taking the 3D Laplace equation as the basic governing equation, a mathematical model with respect to the interaction between linear waves and arbitrary 3D structures was founded. For the example of wave action with three cylinders, numerical results show that wave force Fx decrease and wave force Fy increase in each cylinder by incident wave direction from 0° to 60° wave height on origin point increases with incident wave direction increasing for given layout and incident wave conditions. © (2013) Trans Tech Publications, Switzerland. Source

Zhang L.Z.,Harbin Institute of Technology | Chen T.L.,China Harbour Engineering Company Ltd | Xiong W.,Harbin Institute of Technology
Applied Mechanics and Materials | Year: 2013

Large span self-anchored suspension bridges which are located in the strong earthquake zone often have no sufficient anti-seismic capacity, especially the bridge pylon. Therefore, seismic response control is necessary. This paper studies the lateral damping control effects of one large-span self-anchored suspension bridge with tuned mass damper (TMD). Using a spatial dynamic analysis finite element mode, the seismic responses are calculated out. Seismic response analysis results show that a large lateral displacement appeared at the pylon top under the lateral seismic action and the moment peak at the pylon bottom is nearly reaching its equivalent yield moment gotten by moment-curvature curve, which would be resulted in a high risk of collapse of self-anchored suspension bridge under lateral earthquake action. Therefore, one TMD is considered to be applied on the pylon top of the self-anchored suspension bridge to reduce the seismic response. The simulation result shows that the TMD can provide remarkable effect on seismic response control of the pylon. The control efficiency of TMD can be up to 23.4%. The moment at the pylon bottom and the displacement at the pylon top both decrease obviously. The parameter analyses of TMD are also performed to get the best design parameter. The research results can be used as the reference of seismic response control or anti-seismic design for the same type of bridge. © (2013) Trans Tech Publications, Switzerland. Source

Chen C.,Changsha University of Science and Technology | Chen C.,China Harbour Engineering Company Ltd | Zheng J.L.,Changsha University of Science and Technology
Applied Mechanics and Materials | Year: 2013

The portable falling weight deflectometer (PFWD) test, bearing plate test, beckman beam test, and compaction test were carried out in this study. The relation of dynamic modulus and static modulus, dynamic modulus and deflection, dynamic modulus and compaction ratio, dynamic modulus and water content (consistency) was built. It turns out that there are good power function regression relationship between dynamic modulus and static modulus, dynamic modulus and deflection, dynamic modulus and compaction ratio, dynamic modulus and water content and consistency. © (2013) Trans Tech Publications, Switzerland. Source

You T.,Changsha University of Science and Technology | Yao Z.-H.,Changsha University of Science and Technology | Wang W.,China Harbour Engineering Company Ltd
Advanced Materials Research | Year: 2012

A qualitative analysis has been made on the slow development of the engineering project management and corresponding cost control method which has been the bottleneck of the rapid development in the engineering industry and construction production. The economic development of the market and the changing investigation subjects urgently need the reform and renewal to the current engineering project management and the cost control. The unification of engineering project management system in China to the international practice after reform not only adapts the requirements of national economic market development, but also creates conditions for the Chinese construction enterprises to participate in the international construction market successfully. © (2012) Trans Tech Publications, Switzerland. Source

Zhong Z.,Shaoxing University | Zhong Z.,Pennsylvania State University | Gao H.-C.,Shaoxing University | Xie C.-F.,China Harbour Engineering Company Ltd
Yantu Lixue/Rock and Soil Mechanics | Year: 2015

A coupled model including the combination of pressure solution model and stress corrosion model is proposed to simulate the observed strength recovery of limestone fracture. Thus, the coupled model can consider both pressure solution and stress corrosion in modification of the fracture contact area, which is used to predict the frictional healing of the fracture. The simulation results show that the pressure solution model underestimates frictional healing during short hold times, and with extending the hold times, the simulated results of the pressure solution model obviously increase with the growth of temperature, whereas the results are slightly influenced by the effective confining stress. Generally, the stress corrosion model reflects the growth of fracture contact area caused by compaction. Therefore, the coupled model can simulate the frictional healing well observed from Slide-Hold-Slide (SHS) tests. In conclusion, the stress corrosion model should be considered, when the pressure solution model is employed to simulate the frictional healing, especially under short hold times and at low temperatures when the domain effects are mechanical. © 2015, Academia Sinica. All right reserved. Source

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