Applied Mechanics and Materials Vols. 584-586

Abstract: The building environment and the building roof structure of buildings are different from each other. This causes the different combination methods of solar collectors and building roof. The outlook of solar collectors and the methods of waterproof and insulation are various. These factors will contribute to the diversification of forms of solar water heaters. This paper describes several combination methods of solar collectors and building roof and the corresponding waterproof and insulation methods. Based on existing combination methods and in the premise to ensure the safety and functionality, a more simple and economical combination method was put forward - combination structure of industrial aluminum and its accessories. It can meet the requirements of the industrialization of constructional installation and building integrate in our social.

Abstract: Most of the design programs used in the foundation excavation protection can only simulate and calculate the model of semi-infinite soil. While the limited soil is usually came across during practical engineering, especially in the center of large city. So the results of calculations in these situation can not ensure the security and economy. In this paper, based on a bracing foundation excavation protection project in limited soil, calculate the active soil pressure using MATHCAD, then analyze the bracing reaction force through the equivalent beam method. Finally, comparing the results with the simulation of ABAQUS, the method above could used in the similar situation in the further design of foundation excavation protection.

Abstract: Based on a systemic analysis of the factors which might influence building energy efficiency, a cluster of corresponding indicators are proposed and screened for different stages in the whole life-cycle of buildings. A questionnaire survey was conducted to confirm the weights of the selected indicators and identify critical control objects for building energy saving. This research provides the methodology for selecting appropriate control objects for building energy-efficiency under various management scenarios.

Abstract: The design of hump profile has great effects on the capacity of marshalling stations. Based on the law of conservation of energy, the paper builds forward inference velocity models and backward inference velocity models by studying on the relationship of work and energy of rolling cars on the hump. Then the algorithm of plotting velocity curves and time curves in different conditions is put forward. Finally, the paper checks the hump profile with the Hump Profile Design and Checking System and proves the practicability of the system.

Abstract: Analyze the influence factors of mix proportion affecting concrete freeze-thaw damage. Use the five main performance indexes of the concrete, which are compressive strength, strength of extension, impermeability grade, and frost resistance grade and per unit volume cost concrete, as the objective function of multi-objective optimization equation. Invoke the fgoalattain function in the MATLAB Optimization Toolbox to solve. The optimized parameters of mix proportion of frost resistance construction of unit concrete in cold region are: concrete 1532.6kg, water 910kg, sand 5510.6kg, 5-20mm cobblestone 3747.2kg、20-40mm cobblestone 3658.6kg、40-80mm cobblestone 4733.5kg、80-150mm cobblestone 4738.1kg, and the dosage of water reducing agent is 7.3kg.

Abstract: The crude oil storage tank foundation is always treated by using vibration replacement stone column composite foundation treatment, mainly to improve the engineering properties of foundation soil and the deformation properties of soil, improving the bearing capacity of composite foundation, and to ensure the normal use of tank in the superstructure loads from damage or excessive deformation. Before construction to carry out the vibration replacement stone column composite foundation pile test, the test shows that strengthening the foundation bearing capacity characteristic value of vibration replacement stone column can meet the design requirements.

Abstract: Combining with the localized analysis capability of the wavelet and the learning capability of the neural network, this article investigates the wavelet neural network nonlinear time series model and the wavelet neural network architecture integrated model which combines the affine transformation and the rotation transformation ,moreover, based on wavelet neural network algorithm that substitutes the Morlet wavelet function for the Sigmoid function, researchers analyze the application of Wavelet Neural Network in settlement deformation of high-speed rail. The example this paper discussed shows that the wavelet neural network has good results in the deformation prediction, especially in large complicated engineering.

Abstract: For the foamed asphalt cold recycling mixture,we mould the specimens under two different gradation using Marshall compaction method.Then we measure the bulk specific density using the volumetrical method, the corelock method, the wax-sealing method and the saturated surface dry method, calculate the porosity and compare the results.The conclusion is that the results are almost the same under the corelock method, the wax-sealing method and the saturated surface dry method, we can choose the saturated surface dry method to gain the porosity in practical use.

Abstract: This article discusses the application of mathematical simulation for planning the timing of repair of building structures according to their degree of physical deterioration. For the current study, 296 apartment buildings were selected from the housing stock in Archangelsk city, using neural network Self-Organizing Maps (SOMs). Optimal clustering of selected housing was achieved using special Deductor platforms to define 16 housing clusters with maximum difference but high internal similarity. For more detailed scheduling of building overhaul and running repairs, selected clusters were divided into 4 model-groups that needed the same repairs in similar time frames. Integration of the particular characteristics of each group created a framework for calculating the capital investments for each model group, with specific payments identified for each cluster.

Abstract: By the engineering background of Datong-Xian Passenger Dedicated Railway Line passing through the collapsible loess area, four representative test sections such as roadbed-bridge transition section, roadbed-culvert transition section, ordinary and special embankment section was selected. Different pile parameter and pile plane layout and subgrade filling measure has been taken according to the different test sections. At the same time, the correspondence of settlement monitoring project was carried out. After the long time monitoring, by the hyperbolic curve and logarithmic method predicting, the long-term settlement has been predicted. The monitoring results and the curve fitting shows that the settlement and the foundation treatment schemes with subgrade filling measurement meet the design requirement also provided reference and reference for other engineering.