Advanced Materials Research Vols. 1049-1050

Abstract: Based on Mindlin displacement solution and Winkler’s assumption, the stress distribution formula of the internal anchorage section of full-length Injected bolt are deduced. The transmission law, attenuating characteristic of the shear stress are studied and then compared with the results from the test. It indicates that these two analytic solutions are agreed with the results from the test in the main. A reference principle for the analysis of the shear stress on the first and second interfaces of the anchorage section through model tests is provided.

Abstract: Based on the component method of EuroCode3, a new component model to evaluate properties of T-stub connections under large deformation condition has been proposed in this paper. Firstly, the T-stub connection was breakdown into several components. And then those components was equivalent to bilinear springs. Finally the multi-spring model of T-stub connection was set up to describe its load deformation behaviour. With the purpose of verifying and calibrating the proposed model, a series of case studies were carried out and corresponding finite element models has also been set up. Results of FEM and multi-spring model fit well each other. And the applicability of the proposed model can be testified by the parametric study. The method of this paper can describe the behaviour of T-stub connections under large deformation condition, which can be a useful improvement to conventional design codes.

Abstract: Based on smoothed particle hydrodynamics (SPH) and FEM method, the dynamic simulation of rigid cylindric plate's sinking process on soil is studied with LS-DYNA software, and MAT 147 material model is used to describe soil's attributes. The stress distribution and flowing trend of the soil are compared at different period. The simulation results show that the SPH/FEM method is useful to analyze large deformation of soil, and our findings can give helps to the mechanical design of the components interacting with soil.

Abstract: The topography, hydrogeological condition and engineering geological condition of various regions are complicated in China. The demolition and site preparation of mountains construction site generally need to do a large number of excavation and embankment fill, need to consider the problem such as landslide and slope, temporary earthwork stack. The available soil temporary stack involving the question such as safety, environmental protection, etc, with two instances to illustrate should according to quality, safety and environmental protection objectives for construction management of temporary pile soil.

Abstract: Based on the shortage of materials during emergency rescue after the earthquake, it proposes the self-rescue principle for the temporal relocation of victims. Through analyzing different types of emergency shelter, and combined with features and purposes of local materials that can be directly used after the earthquake, it puts forward the method of locally selecting materials and rapidly building emergency shelters. It provides victims with a new choice for the temporal relocation during emergency rescue after the earthquake.

Abstract: This paper first introduces the basic concept of the CSG (cemented sand and gravel) dam construction. It then puts forward a new quality control method by inspecting the in-situ P-wave speed of CSG as an alternative to the conventional specimen compression tests. Through an extensive experimental program, it is found that there is a good correlation between the compressive strength and P-wave speed of CSG, which makes the P-wave speed measurement potentially an effective and efficient quality control measure to evaluate the CSG strength on site.

Abstract: There are two most important things in old town reconstruction: the functional reconstruction and landscape regeneration. Purpose is to restore its ability of sustainable development. In landscape architecture, planning industry refers to the land for a certain range of perceived visual things and events , as well as the art of relationship with the surrounding space organization. What is the public landscape, the author thinks that the public landscape is within the category of landscape, is open to the general public, is the landscape place for public use, enjoy and entertainment. Such as city square, commercial landscape, street landscape, residential landscape,, mountain landscape, waterfront landscape, etc.Old city reconstruction of four kinds of modes: completely torn down; keep the old city, nearby building auxiliary city; the continuation of historical context, the whole old as sweet; keep the old appearance, update of internal functions. Four patterns, the old as before and update the internal function of two models design provides a platform for regeneration. Environmental regulation is the foundation in the old city reconstruction, public landscape construction is the key, the public landscape regeneration can be designed on the basis of the original resources; using the landscape design methods to existing resources for rebuilding, expansion or repair, realize the value of reuse. The old town has a lot of historic culture, which is the soul of the city, in the process of public landscape regeneration design, place spirit of the city is also the key in the process of transformation. Both the pursuit of enjoyment on the vision and the pursuit of the heart of comfort, regenerative designs are effective methods.

Abstract: Skin Stapler is an alternative instrument, which makes surgy easily and quickly and owns fine-looking effect without scars after the wound healed, to traditional surgical suture for the wound skin sewing. Magnesium recently is considered to develop medical implants because of its beneficial biocompatibility and bioabsorability. Due its less mechanical strength than traditional 316L stainless steel used in common staple, this paper try to optimize the structure of pure magnesium skin staple by FEM models and simulation as so to assure its biomechanical safty. Using ADINA software, two staples with different pre-bended shoulders and the traditional staple without shoulder are modeling to analyze its stress and plastical strain during structural deformation under load. The results, not only of pure magnesium models but also of 316L stainless steel models, showed that the shoulders optimization on staple structure has important role in its mechanical performance. The research increases the possibility of bioabsorable magnesium material application on medical skin staple.

Abstract: Intravascular optical coherence tomography (IV-OCT) is a new intervention imaging technology for the diagnosis of coronary heart disease. Because of its high-resolution and non-invasive characteristics, it is widely used in clinical medicine. It has a revolutionary impact on coronary artery disease diagnosis, prognosis and treatment decisions. This paper studied this hot topic, gave the basic concepts of intravascular OCT image sequences. In accordance with current development studies, the key technology for three-dimensional reconstruction of the coronary vascular system is proposed and analyzed. On this basis, we proposed future research directions on IV-OCT vascular three-dimensional reconstruction, including clinical trial frequency domain OCT (OFDI), the combination of IV-OCT and intravascular ultrasound (IVUS) and a preliminary study of intravascular photoacoustic (IVPA) imaging.

Abstract: Radio tomographic imaging as a coarse computational imaging method has attracted much attentions due to its potential applications in human surveillance. It utilizes the shadow fading characteristics of radio signals among wireless sensor network nodes to infer the targets' localization. The recovery process involves a large number of scanning links, which brings heavy burdens on node energy, communication routes and data storage. In general, there is a small number of targets and could be seen as a sparse signal compared with the original high-dimensional space. Hence, the key of scene recovery is the effective links selected. This part of work presents a heuristic link selection for radio tomographic localization system, which introduces a Bayesian compressive sensing (BCS) to heuristic link selection method for scene imaging reconstruction.