Applied Mechanics and Materials Vols. 351-352

Abstract: It is supposed to be constructed a kind of profiled pipe culvert which have a new type of cross, in view of the reinforced concrete circular culvert's various diseases that occurred in service of it. In order to know about the mechanical characters of structure, and test the carrying capacity of the profiled pipe culvert, the load test can be used to have a research on the stress, deformation characteristics, and crack distribution and development on the profiled pipe culvert.

Abstract: The bearing is the important part that connects the superstructure and substructure of bridge, in which diseases occur affects the running safety. In this paper, take the diseases of the rocking axle bearing of railway prestressed concrete T-beam bridge as the backing, the special equipment of backing plate of the bearing bottom plate is produced by one's own master development. The technical scheme of rectification and uplift of the bearing during maintaining sky-light of the operating line is researched. Rapid treatment technique of inclined bearing and track irregularity caused by settlement of the bridge foundation is proposed. The research can be used for reference for similar bearing diseases regulation projects.

Abstract: In order to find out the problems of rural buildings in Chaohu City, we gave the safety level assessment of most rural buildings which belong to Tianhe Street in Chaohu and analyze the representative problems and dangerous points, we also make the corresponding solution of these problems. This survey can be the guidance or theoretical support for the local government to change the rural buildings current situation and reinforce the decrepit house.

Abstract: The elasto-plastic analysis of reinforced concrete square columns was introduced to study the relationship between lateral force and curvature by using the open source program OpenSees. A pseudo static test on the inverted "T" shape reinforced concrete square column was conducted for the comparative analysis. The results indicated that the lateral force calculated by program agree with experimental data with an axial load ratio of 0.33. The calculated yield lateral force was 29.7 kN, the error was lower than 7% compared with experimental results. In addition, the cross-section curvature were obtained, which were difficult to obtain through the traditional experimental study, the calculated yield curvature was 1.825×10^-5. The calculated results with different axial load ratios were presented in this paper, which showed that both the yield lateral force and curvature of reinforced concrete square columns were increased with low axial load ratio, and at the same time it could reduce some experimental work by using computer simulation.

Abstract: There are many engineering diseases during asphalt road operating process caused by poor subgrade bearing capacity or pavement structural strength, mainly as the form of structural cracks, net-shaped cracks, subsidence, rutting. This phenomenon is more widespread in the level road whose structure form is rock filled sand or lime-flyash soil. Due to the engineering diseases of level road caused by poor subgrade bearing capacity or pavement structural strength, analyzing and comparing of various repair and reinforcement method, valve-pipe grouting technology is proposed. This paper revealed the grouting slurry diffusion and consolidation forming situation of the valve-pipe grouting technology.

Abstract: This paper finds that the elevated building normally located in Chongqings mountainous areas can be optimized in both integral structure and individual elements. Through the calculation of typical structure, the weaknesses of elevated building are the unevenness of the internal force caused by external loads and the over-length of supporting bars. Meanwhile, through the way of numerical modeling which uses the features of two-dimensional member bar system, specific solutions are pointed out. The conclusion can be drawn through the analysis of results and data that the more direct the method of transferring force is, the more stable the structure is. In addition, within the experience of practical engineering programs, strengths and weaknesses are also put forward through comparing measures within themselves, which can enhance the ability to resist the impulsive or extreme external force.

Abstract: The bored pile which have the unique advantage in having no noise, no shake, no upheaval, no sides way in the process of construction has became into one of the most widely used pile foundations in high heavy construction in Inner Mongolia region. Through an engineering project of bored piles in Inner Mongolia region, this article takes an analysis for bearing behavior of the bored piles in sandy and silt layer in this region. It also discusses the influence construction technology on pile-end ultimate resistance and the reasonable range of reduction factor of the ultimate resistance. When the soil layers structure is similar, it could improve bearing capacity of single pile for bored pile by utilizing the supporting layer and substratums optional regrouping. Utilize traditional single pile bearing capacity theory formula calculating and the static load test results it takes an analysis, finding out the approach of improving the bearing capacity of single pile for bored pile in sandy and silt layer. So we could find the optimization design for pile foundation bearing capacity of bored pile and thus promote the improvement in bored piles theory research and engineering application level in Inner Mongolia region and provide theory and engineering design experience.

Abstract: Through the laboratory and field tests of flexural toughness for steel fiber reinforced concrete (SFRC) joists, the relations between different steel fiber contents/different mix proportions and the flexural toughness of SFRC were investigated, and an economic, reasonable mix proportion for moulded SFRC is thereby proposed. According to the study results, this paper may guide the design and construction to meet the requirements of dam strengthening projects and provide reference for the strengthening of similar water conservancy projects.

Abstract: Foshan Zumiao is one of the three major treasures of the Lingnan ancient buildings and the establishment of the Digital Zumiao is a cultural project of important significance. By means of the combination of the overall-view images obtained by high dynamical light rendering technique (HDR) and the images with digital back ultrahigh resolution, with the multimedia database as the bolster, the Digital Zumiao realizes the reflection of the entity space of the Zumiao building in the virtual environment. Based on this target and experienced the processes and works such as the data survey and acquisition of the Digital Zumiao, analysis and processing of images and word data, and the set up of multimedia database of the Digital Zumiao etc. the virtual reality system and the digitalizing system of the Digital Zumiao were established .

Abstract: Based on the discussion of the quality control and management requirements for the concrete raw materials, the raw materials preservation heat in the mixing concrete process and the note in the process of transportation with the requirements both in concrete casting process and the casting vibrating process, the paper proposes the construction key technology of improving the durability of the concrete in alpine region.