Advanced Materials Research Vols. 1049-1050

Abstract: Based on the discussion of beneath cement concrete pavement void disease, the slab bottom grouting is the main method to solve the disease, and also discussing the strength, frost resistance, resistance to shrinkage, flow uniformity, grouting construction points and ratio of grouting materials, the key points of construction quality control of grouting are specified, the cement pavement disease treatments are put forward.

Abstract: By large-scale finite element software ANSYS, the seismic response of large span steel - concrete composite beams were analyzed, to get the change rule of the deflection and stress of the design. And analysis of the extension of design parameters for influence factors, such as concrete grade, reinforcement ratio, the height of steel beam, is to get their effect of the seismic responses of the composite beam deflection and stress, and provide powerful basis for optimal design of composite beams. For the model in the interface by setting the three direction spring element to simulate the interface slip and vertical uplift, and choosing three directions of EI Centro seismic wave including relatively rich spectrum as input, the result of analysis is relatively accurate.

Abstract: Dynamic mechanical properties of high elastic type cement and asphalt mortar (CA mortar) for high-speed railway was studied by split Hopkinson pressure bar (SHPB) in this paper. The experimental result show that the compressive strength of CA mortar increases gradually with the increasing of strain-rate. However, the increasing rate of compressive of CA mortar decreases with the further increasing strain-rate. The increasing rate of compressive strength is 57.65% for the strain-rate ranging from 25.16 s^-1to 35.79 s^-1 and 20.39% for the strain-rate from 94.64 up to 111.15 s^-1, respectively. The larger the strain-rate is, the more serious the cracking is when CA mortar specimen damaged. The specific energy adsorption of CA mortar increases with the increasing strain-rate.

Abstract: This paper presents a self-centering bridge which is simplified as a deformation body ,while mechanical performance is still in the elastic range ,considering the influence of gravity pier ,the upper structure load ,prestressed tendons and dampers, the horizontal load vs. rotation curve of the self-centering bridge is obtained by theoretical derivation . The study for the self-centering bridge presented in this paper indicates that: under the cyclic loading hysteretic curve type is flag-shaped ,the prestressed tendons provide self-centering ability and dampers provide dissipating energy.

Abstract: Follow the principle of sustainable development of green building, in accordance with the "section, energy saving, water saving, material saving, environmental protection" tenet, into the spirit of green energy conservation principle. From the use of reduced building materials, all kinds of resources and non renewable resources, the use of green materials, waste recycling, reducing emissions of pollutants, etc. In the process of implementation, the use of communications technology, control technology, IC card technology, security, integrated wiring technology and system integration technology, to establish a system of community residents, residents of internal communication center, tenants and external social information.

Abstract: Lying in the southwest of China and having a very unique environment and history, north Guangxi is known for its great variety of natural conditions and folk cultures. Addressing the application of the traditional construction material from the ecological prospective, this paper looks into how the traditional construction materials are utilized in the folk houses in the northern part of Guangxi, the reason behind and the impacts upon the architecture. The related finding will provide suggestions on the protection, renovation, as well as the inheritance of the traditional folk architectural heritage.

Abstract: The in-plane mechanical properties of aluminium beams under cyclic bending were analyzed and contrasted to those of steel beams. In order to carry out research on in-plane seismic performance of aluminium beams, a finite element analysis method was presented. The method was based on general FEA software, ANSYS. The analysis method considered the effects of material nonlinearity and geometrical nonlinearity. On this basis, hysteretic curves and reversal skeleton curves of 6061-T6 aluminium beams, 6061-T4 aluminium beams and Q235 steel beams under cyclic bending were get and contrasted. The analysis shows that the in-plane seismic performance of the aluminium beams is similar with the low carbon steel beams and is notably influenced by material properties.

Abstract: The out-of-plane mechanical properties of aluminium beams under cyclic bending were studied and contrasted to those of steel beams. In order to carry out research on out-of-plane seismic stability performance of aluminium beams, a method by finite element analysis was proposed. The method was based on FEA software, ANSYS. The analysis methods considered the effects of material nonlinearity, geometrical nonlinearity and initial imperfection. Based on above, hysteretic curves, reversal skeleton curves and stiffness degradation curves of 6061-T6 aluminium beams, 6061-T4 aluminium beams and Q235 steel beams under cyclic bending were get and contrasted. Results show that the out-of-plane seismic stability performance of the aluminium beams is lower than the low carbon steel beams and is significantly influenced by material properties.

Abstract: Analyzing the use of wood in the folk houses of Guangxi Province, this paper tries to probe into the ecological and cultural value of wood of Guangxi, aiming to find a green pathway to the ecological, environmental friendly lifestyle.

Abstract: In recent years, the problem of the human-induced bridge vibration has attracted more and more concerns. In this paper , a steel structure footbridge named Shuang'an East in Beijing was taken as the example to collect the whole bridge vibration data and build the finite element model with the finite element software. In addition, this research changes the limitation of considering the pedestrian load as a whole with a traffic flow simulation software, which is based on social force model, applying to reflect the pedestrians' locations during walking. Comparing the simulation data with the the measured data, the vibration serviceability of footbridge will decrease with the increasing of the number of the pedestrians. The analysis results will provide reference for the dynamic characteristic of similar structures.