Advanced Materials Research Vols. 243-249

Abstract: This paper introduced general methods of the GPS technology for open-air side slope deformation monitoring，and the entire process of the GPS deformation monitoring through the lead zinc ore open-air side slope in Yinshan，Dexing city, Jiangxi Province including technology design of monitoring network，field survey，data processing and deformation analysis．The results indicate that GPS static positioning technology reached the precision of mini-meter，has good advantages in the open-air side slope deformation monitoring and fully meet the requirements of high-precision deformation monitoring．

Abstract: A real-time monitoring and pre -warning system has been established in Xinqiao pyrite mine. 3S and smart monitoring technology is broadly applied in the field for their advantages. The system is integrated by the database management subsystem, smart monitoring subsystem and early warning subsystem. It can accomplish monitoring data analysis and forecast in point or district. The location of monitoring points and the main methods are introduced in detail and the key techniques about data transmission and processing have been designed successfully which find a way out of the difficulty on the condition that the circumstance is bad and the monitoring signal is interfered strongly in long haul transmission. Through this system remote controlling and real-time prediction can be realized easily. So it has great application value to study the system.

Abstract: Digital images provide abundant information for the research of building deformation. However, such information is insufficient for the purpose of accurately measuring a building’s shape. This paper explores the method for restoring a building’s accurate shape from digital images. The relationship between oblique images and facade images can be analyzed to correct the distortion of a building’s facade images. The experimental results show that this practical method can meet the requirement of accurate measurement of a building’s deformation.

Abstract: Reinforced soil has been among the most effective soil modification materials. Its use has been expanded rapidly into civil engineering, geotechnical engineering and pavement engineering. Reinforcing subgarde in pavement systems has always been an issue. This study focuses on effect of fibre inclusion on the modulus of elasticity of subgrade material. Plastic fibre was used for this investigation. Fibre contents and aspect ratio have been changed during these tests. The fibre percentage varied from 0 % (for unreinforced samples) to 6%. Clay was used as sub grade material. Unconfined compression tests were carried out to investigate behaviour of the composite under different condition. The fibre length and fibre content found to play important rule on the modulus of elasticity of fibre. Furthermore it was observed that ductility of sample increased by fibre inclusion.

Abstract: After ore mined, the equilibrium state of original rock stress around mining area is damaged, causing surface deforming at large range. With the increasing resource needing and mining intensity, the mines all over the world are gradually in a stage of deep mining, so it is important to study the principle of surface deformation under the condition of deep mining. Finite element method is used to simulate mine process with increasing depth, and the relationship between mining depth and surface deformation is achieved. The result has important reference value to practical engineering.

Abstract: Tensegrity structures are of interest to architecture and engineering as a practical means to explore lightweight and rapidly deployable modular structures that have a high degree of geometric freedom and formal potency. The notion of tensegrity structures with 3D ‘compressed’ components is accreted by authors in 2009 [1]. This extended class of tensegrity overcomes some of the difficulties of typically ones by providing increased rigidity and more controlled structural behaviour. These two characteristics make 3D compression member tensegrity structures more suitable for practical use in building instant stand up structures. In this paper, the Authors introduce a method to create instant built structures with 3D Compression Members including the modules creation, digital form finding and assembling procedures. Exmple of a speculative design for a footbridge and a high rise building is demonstrated.

Abstract: The paper gives energy consumption indexes of government organization office buildings at the current stage, and then analyses energy-saving potential of office buildings. Further, it discusses building consumption has a correlation between the heating form of air conditioning and personnel density. Finally, the paper presents the energy consumption quota and the formulating method of using energy quota of state organ office buildings at the current stage.

Abstract: Digital Image Correlation, DIC method is developed a low-cost digital image correlation coefficient method based on advanced digital cameras and high-speed computers. Traditionally, two or more cameras are widely applied for conducting 3-D monitoring. There are numerous parameters need to be accurately calibrated. Therefore, the results of 3-D accuracy are worse than that of 2-D accuracy. The feasibility of a single camera to collect image to analyze the three-dimensional rugged surface of material is proposed in this study. A three-dimensional facial mask-like human makeup test and plaster cast are used to test. The test results reveal that the coordinate error between these two photos of the three-dimensional facial mask-like human makeup test is only 0.002mm and the absolute displacement, rotate on z-axis, strain on z-axis and von Mises strain of analysis results are extremely close to the real surface plaster cast.

Abstract: Based on Newmark’s step-by-step implicit integration method, an improved algorithm for promoting computing efficiency is put forward in this paper. Implicit integration method and improved algorithm were applied respectively to analyze the dynamic responses of a tunnel due to train vibration. Results indicated that the improved algorithm enhanced remarkably the efficiency of computation.

Abstract: The problem of a normal force acting in the thin layer of semi-infinite coating materials has been studied by adopting the image point technology in this paper. The explicit fundamental solution is given in the series of the displacement functions corresponding to each image point. The displacement functions corresponding to the higher order image points can be determined from those to the lower ones by the recurrence formula presented in this paper. Numerical analysis by means of the finite element method has been carried out to verify the theoretical results. It is found that the accurate enough theoretical solution can be obtained by only taking the displacement functions corresponding to the first several image points into account.