Advanced Materials Research Vol. 743

Abstract: This paper presents a study on the axial compressive behavior of fiber reinforced polymer (FRP)-confined high-strength concrete (HSC). A large experimental test database assembled from the published literature was used to investigate and quantify factors influencing the compressive behavior of FRP-confined HSC. The database consisted of 976 test data having unconfined concrete strength ranging from 6.2 to 169.7MPa. Based on the analysis results of the database, it was found that the threshold confinement stiffness increases significantly with an increase in concrete strength, which in turn adversely affects the strength enhancement of confined concrete. It was also observed that the hoop rupture strain of FRP shell decreases with an increase in concrete strength. Existing confinement models that are applicable to FRP-confined HSC were assessed using the database. Finally, a new simple design-oriented model for FRP-confined HSC developed on the basis of the database is presented.

Abstract: With the rapid development of economic in China, a serious of important construction projects is put into practice. The building materials of the significant engineering construction projects get more attention, and strengthen supervision for building materials is an important element of social stability risk. Building an evaluation of social stability risk on engineering construction projects with building materials can find the hidden dangers which may affect social stability timely, so that the builders can take effective measures earlier to reduce and resolve social stability risk. This is meaningful for the smooth implementation of construction projects and keeping of social stability.

Abstract: In order to make good use of waste iron tailings considering energy conservation and environment protection, a new research on the use of tailings in road base has been carried out in this study. A type of iron tailings stabilized with cement made of appropriate amount of cement was firstly selected as the semi-rigid base material. After the mix proportion design based on material characteristics, compaction tests, unconfined compression tests and economic analysis were conducted on the mixture. It shows that iron tailings stabilized with cement with a more than 15% cement content meets the test requirements well and can be applied on the base and subbase course of low-grade highway. Helping to save road materials and reduce project costs, the study has a promising application prospect.

Abstract: In the period of several years, the research oriented to the development of particular type of glass-fibre-concrete (GFC) and to its application in buildings is continuously realized on the authors’ workplace in co-operation with the Research Institute of Building Materials (VUSTAH). The first type of glass-fibre-concrete developed by VUSTAH has been determined and produced for the utilization in façade panels especially, but currently the GFC technology and quality is developed and aimed to use it also as parts of load-carrying civil engineering structures. To investigate the actual behaviour of GFC structural components subjected to loading actions and to obtain information of their load-carrying capacities, within the frame of this research the experimental verification is realized. This paper is focused on the partial problem of the design and realization of glass-fibre-concrete façade cassette panels, that means the results of experimental verification of their actual behaviour and load-carrying capacity, if subjected to the wind loading actions, are presented.

Abstract: This study was developed within a research project concerning the seismic vulnerability assessment of precast industrial buildings built in Italy in the 1970s without earthquake-resistant provisions. Two reference precast buildings with beam-to-column connections based on neoprene-concrete friction strength were considered. Accurate numerical models of the existing buildings were developed and nonlinear dynamic time-history analyses with different seismic intensity levels were carried out in order to identify the main causes of structural collapse. The maximum values of the demand-to-capacity ratio in terms of chord rotation were computed for the columns of the investigated precast buildings. The capacity was larger than the demand, even in case of high levels of seismic excitation. Numerical results showed that existing precast industrial buildings can collapse due to beam-to-column connection failure for loss of support, confirming real events observed during recent earthquakes. The friction resistance was exceeded under moderate-to-severe seismic actions at the corner columns where the static vertical load was lower. Numerical analyses highlighted the detrimental effects of the vertical component of the seismic action on the likelihood of the occurrence of beam-to-column connection failure due to loss of support.

Abstract: The paper deals with the problems of the actual behaviour of glass-fibre-concrete (GFC) facade components stiffened by the rib. The results of loading tests of GFC plated panels subjected to the load simulating the effects of the wind pressuring or sucking are especially presented in the paper. Loading tests were oriented to the investigation of the actual behaviour of GFC component in the loading progress up to the failure, in particular with the accent to monitoring the strain mechanism in the loading process and subsequent the failure mechanism at reaching the ultimate load-bearing capacity. The particular test results in the form of the objective ultimate capacities obtained as the maximal loads at the failure give the important information on the properties of the plated facade panel composed of glass-fibre-concrete produced by the “splashing” method, namely in the relation to the physical-mechanical properties of the material and to the geometrical characteristics of the panel cross-section.

Abstract: Abstract: With the rapid development of Chinese economy, more and more requirements of large public buildings, large space and has more functions, the engineering design, construction and bring many technical problems, in order to solve the technical problem, the construction of scientific research departments continue to research and development of new materials, new technology, new methods of construction, city of Puyang stadium the tennis project 44M*24M large span structure, adopts the ‘made of light material combined unit filled prestressed concrete cast-in-situ slab’ structure technology, solves the light, save steel, concrete, reduces the structure thickness, good economic practicability.

Abstract: Chemical injection of masonry is a very extensively-used method for providing supplemental water-proofing of historic masonry. Like all branches of the construction industry, chemical injection of masonry is under big pressure to achieve greater performance and speed together with maximum efficiency. Current norms and standards permit both pressure injection and non-pressure injection. Are these methods comparable in efficiency, or should we expect differing effects A pilot experiment on model masonry pillars has been carried out at the Klokner Institute. This paper summarises the results and findings of our experiments.

Abstract: The building is enclosed the spatial structure of the human lifestyle, and clothing is the "packaging" of the people, with modesty naked. The building on the space recorded the development and progress of human society, and the clothing reflects the development of human civilization. In this paper, the use of color, body composition and materials of the three aspects of clothing and architecture are discussed similarities and similarities in terms of design, In addition, from the official architectural culture and clothing culture, literati building materials culture and clothing culture and folk building materials culture and clothing materials culture demonstrates the culture intrinsic link between architectural culture clothing culture of mutual learning and mutual influence. To further illustrate the architecture and clothing appears to be two different professional, but in terms of design and culture, between each other is a profound inner link, Both organically combined, will be able to better develop the architectural design and fashion design.

Abstract: Based on the displacement solution of Mindlin problem, the elastic solution to the distribution of shear stress & axial force is deduced under the drawing load for mortar anchor in loess tunnel. The ultimate drawing load of systematic anchor in the sidewall is measured by means of field test based on a certain loess tunnel in Kelan-Linxian Expressway, and the forcing characteristic of the anchor is analyzed. The distribution forms of the shear stress & axial force are also discussed in different soil characteristics. The obtained results will offer the theoretical basis for the design &optimum of systematic bolt in loess tunnel, which has the guiding significance in the design and construction.