Abstract: Based on similarity theory, the systemic analysis for the distribution characteristics of tunnel temperature field in two different working conditions of having no thermal insulation and installing PU as insulator is progressed by using manufactured model test platform in order to realize the tunnel temperature field rule in cold regions with or without thermal insulation and the influence of thermal insulation layout pattern on insulating effect. The results show that the temperature variation conforms to the “tunnel freeze-thaw circle” theory without thermal insulation, and the surrounding rock maintains negative temperature all the time in the low temperature environment; the internal temperature field of surrounding rock plays a decisive role on the surface temperature of surrounding rock, which keeps above 0°C after the layout of thermal insulation with appropriate material and thickness.
Abstract: The floor configuration layer and the floor radiant heat transferred by heat transferred configuration layer exterior with other walls are taken into account in this paper, then physical and mathematics models are developed. Simulation results as well as testing results are compared and analyzed to prove that the models and the calculation methods are right.
Abstract: The aim is to present a numerical method to solve the large-strain consolidation of super soft-soil. The theory of large-strain consolidation (LSC) is acted as the better method for analysis on the consolidation problem of super soft-soil foundation. The focal points are, based on practical engineering, the one-dimensional LSC equations being derived, the consolidation coefficients being inquired and so on. Based on these, one-dimensional nonlinear LSC equation is solved by the FDM, the e~p and e~k function that are according with the practical engineering is introduced into the solving progress, and the multi-layers super soft-soil is also considered in the progress successfully etc. Finally, a case showed the satisfied analysis result by LSCFDM. And some realizations about LSC analysis on super soft-soil are concluded.
Abstract: The crack development of two cast-in-situ RC frame structures subjected to lateral loading was investigated. Then the develop reasons were analyzed. The investigation indicates that the existence of monolithic slab in reinforced concrete frame structure overstrengthened the actual flexural capability of longitudinal beams. Therefore, the participation of monolithic slabs should be made in consideration in structural design to achieve the strong column weak beam philosophy.
Abstract: Regarding the system vibration as the research object, we study vibration characteristics of the system vibration under the damping action. The primary coverage is as follows: under the external condition of undamped condition, damping condition, free vibration, and harmonic excitation, etc., the fundamental vibration form possesses vibration characteristics. In the project practice, the damping factor’s role to the vibrating system, as well as parameter determination is the damping factor. Low frequency effects on the structure system along with the effective of controlling resonance. In the damping treatment, we have characteristics demand for the damping. Through thorough analysis to damping action, we will obtain the best project fitting.
Abstract: Problem exists in the tradition studies of the stratified soil slope back analysis. The limitation of the tradition method was analyzed on the basis of previous research in this paper. And the definition of the soil layer displacement, which overcomes the size effect of the soil layer, was presented. This displacement was weighted in the objective function, reflecting the sliding characteristics of different soil. Then the calculation method weight of weighted was presented. At last, the strength parameter sensitivity of the objective function was calculated by an example. The result showed the stratified soil slope back analysis can be solved by the new method.
Abstract: In the transition seasons, ventilated atrium play an important part in preventing solar radiation, strengthening ventilation, and reducing the energy consumption, so that it is widely used for developing sustainable building. The field measurement was carried out in this paper. This study had focus on comparing the air temperature in different height of the ventilated atrium, and analyzing the cooling effect of ventilation. Moreover, the paper pointed out that how the atrium to improve the thermal environment.
Abstract: Random response of dissipation structure was obtained by means of pseudo-excitation method, and dynamic reliability was analyzed based on random response analysis. In contract that time-dependent reliability was studied by use of Monte Carlo approach. A numerical solution method with iterative analysis procedure for implicit performance function was applied to carry out the relevant statistical parameters. A 6-storey building as an example was analyzed to compare the two methods about reliability.
Abstract: It is found that great differences exist in the consolidated quick direct shear strength index of the silty clay based on several consolidated quick direct shear tests with different rate of shear. In this letter, the changes of the water-content coefficients of the soil samples before and after the tests are analyzed. The results indicate that the drain consolidation phenomenon exists during the consolidated quick direct shear tests. Different rates of shear are corresponding to different levels of drain consolidation, and then the strength index is different. Furthermore, the reason of the fact that the friction angle of the silty clay relatively increases with different rates of shear, while the cohesive strength decreases relatively is explained.
Abstract: Temperature controlling and monitoring of anchorage floor mass concrete construction of one suspension bridge is introduced. The project has carried out information construction through selection of low heat cement, incorporation of a large number of slag and fly ash, cutting down hydration heat, strict temperature controlling, conservation measures and real-time dynamic temperature monitoring. The monitoring provided the basis for heat and humidity conservation of concrete. There are no temperature cracks appearing on anchorage floor after concrete casted. Results show that the temperature controlling method is effective for anchorage floor construction.