Advanced Materials Research Vols. 250-253

Abstract: Four groups of granite aggregates with different mineral structures were investigated. They were formed into test plates with a flat surface and polished with the Aachen Rafeling Tester using quartz powder and quartz sand as the polishing agent respectively. At the end of each polishing stage, the friction coefficient of these plates was measured with the skid resistance tester (SRT) and the Wehner/Schulze test apparatus (PWS), which represent different contact conditions. By comparison of the different friction development in the course of polishing, the influence of mineral composition and crystal size on the polishing resistance and friction coefficient of the aggregates is determined. This new methodology can be applied to evaluate the long-term skid resistance of the aggregates for road engineering.

Abstract: This paper is devoted to correct method of analytical solution of multipoint boundary problems of structural analysis for systems of ordinary differential equations with piecewise constant coefficients. Its major peculiarities include universality, computer-oriented algorithm involving theory of distributions, computational stability, optimal conditionality of resultant systems and partial Jordan decomposition of matrix of coefficients, eliminating necessity of calculation of root vectors.

Abstract: Traditional arts and crafts industry is formed base on the ancient craftsmen to meet all levels of society and spiritual needs of people’s living. Current arts and crafts industry takes this as a basis, in the development of constantly adapt to rapidly changing social, economic, scientific and technological impact people's lives. Therefore, it is inevitable that this development process would occur all kinds of problems. The author paid a long-term attention on the development of arts and crafts industry, through the representative of Suzhou arts and crafts of the base of the actual depth research, start from the specific questions that impact the new arts and crafts sustainable development, the author raised some constructive suggestions after the deep thinking and analysis.

Abstract: An exact symplectic approach is presented for the isotropic viscoelastic solids subjected to external force and temperature boundary conditions. With the use of the method of separation of variables, all the general solutions of the governing equations are derived in the Laplace domain. These general solutions are expressed in concise analytical forms, and are easily to be transformed into the time domain. Accordingly, various boundary conditions can be conveniently described by the combination of the general solutions due to the completeness of the solution space. In the numerical example, the whole character of total creep of the viscoelastic solid is clearly exhibited.

Abstract: This paper analyzed the space and physiological design rules for the senior apartments. Then this paper proposed an integration design approach of these space and physiological design rules based on Soil Building- a kind of Chinese traditional apartment design style. The results show promising value of this integration in designing the senior apartments for the old urban people.

Abstract: The results of experiments and numerical modeling of fracturing of samples of brick masonry are presented; complete stress-strain diagram for samples are obtained; a possibility of replacing a composite material by homogeneous material with effective stiffness characteristics is investigated; the new method and computer simulation for these purposes are suggested. The examples based on real constructions with partial destruction in the form of cracks in load-bearing brick walls have been studied by the means of numerical simulations.

Abstract: The water landscapes of Huizhou ancient villages present evident regional features due to geographical conditions, history and culture and construction idea. Through analysis and summary for characteristics of water landscapes of Huizhou ancient village in the paper, its quintessence is studied to be aimed at providing thinking for optimizing strategy of modern village environment and construction idea of modern landscapes.

Abstract: Inspection made for moment-resist frame connection assembled by welding found that most failures occurred in weld zone between beam and column flange connections, and these failures were caused by cracks initiated at the root of weld. The main reason for the crack initiation is not plastic deformation as expected, and the evaluation results indicated that the major failure mechanism for the brittle failure behavior of moment-resist frame (MRF) connection is caused by the residual stress induced by welding. This paper use finite element method to simulate welding residual stress, and apply them into 3D fracture models. With fracture parameters calculated in finite element analysis, information about fracture strength of MRF connection is acquired.

Abstract: The urban road becoming more perfect, pavement engineering is from new construction to maintenance management. The authorities, from acceptance the new construction turn into survey of the road‘s situation and control of various types of damage and road conditions on time, to maintain a good condition of the road. In this study we use the CCD with the general Global Positioning System to provide GPS coordinates and have a street shooting for each 20m of road, record of the CCD road imaging system, and with GPS coordinates, the street pavement shooting can identify the highest frequency distress type within 100m of the road, and compare with the value of IRI for statistics, considering different distress conditions associated with the International Roughness Index, and to explore the causes. This study has an Urban Road Management System, it divided into road flat index query and pavement condition index query, and user can use this system know the pavement condition every section. The road maintenance unit can be judged by this indicator status of pavement roughness to develop a conservation strategy of each section, reflecting the degree of conservation of each section, making the pavement to maintain a good quality. Urban road maintenance management system is for the each authorities built the road pavement maintenance management system for pavement managers with different levels of management authority, and to assist in the system can provide information for urban roads to do planning, query and management, it is beneficial to the authorities to implementation of urban roads and other road maintenance operations, they can immediately understand the pavement condition.

Abstract: With development of economy in our country, buildings update rapidly and construction waste increases sharply, which destroyed city appearance and eco-environmental pollution severely. It becomes a hot topic that how to plan or manage the management of construction waste growing day by day. According to analysis of the components of construction waste, problems in disposal process and its effect on environment, disposal status of construction waste was introduced, and presented suggestions on developing recycle countermeasure.