Applied Mechanics and Materials Vols. 580-583

Abstract: The Rankine approach has been extended to predict fire resistance of steel, reinforced concrete and concrete filled steel tube (CFS) columns. The conventional Rankine method ignores the coupling interaction and leads to a lower bound prediction compared with actual failure loads, especially for CFS columns. This paper develops a rational and straightforward approach to predict the fire resistance of CFS columns considering the shear bond effect. The method hinges on concept of modified buckling coefficient, and applicable to both axially and eccentrically loaded columns. It shows that the proposed approach predicts the failure load more accurately compared with the traditional Rankine approach. Four case studies comprised of 118 CFS columns from different labs are analyzed to verify the proposed approach. Material deterioration at elevated temperature with regard to the strength and stability of columns is also quantified.

Abstract: The study purpose is to design a comprehensive and visual fire risk evaluation system for high-rise civil buildings. Firstly, according to the characteristics of high-rise civil buildings, based on the hazards identification, combined with the international building fire codes, by using the typical accident causation analysis and other methods, the various uncertain factors affecting high-rise civil building fire are analyzed, and a fire risk evaluation tree for high-rise civil buildings was built. Then the unascertained theory is introduced, and a new visual fire risk evaluation system is designed for high-rise civil buildings based on the unascertained C-clustering model and the visual basic (VB) technology. At last, take the fire survey data of China 8 typical high-rise civil building as example, to make an empirical analysis. The research results can provide a reliable decision support system for the high-rise civil building fire risk management.

Abstract: Natural disasters refer to casualties, property damage and social instability. Coastal urban areas with a high population density coupled with the construction of man-made structures are particularly subjected to storm surge hazards, which have become an increasingly urgent problem. In this paper, we try to set up a risk index system, including risk indicator, vulnerability indicator and prevention and mitigation capability index. Each of the risk components has large number of variables and quantities. Through displaying losses and characteristics of the four natural disasters, we put forward suggestions for better disaster mitigation. So that a better understanding of storm surges risk profile and early disaster warning measurement could be achieved.

Abstract: Storm surge causes severe casualties and commercial losses to the habitant living within the range of it frequently, and has been one of the most harmful and prevailing hazards that attacks coastal areas. This paper is dedicated to reviewing and analyzing the methodologies and models that are generally used to assess the storm surge risk. Firstly, by means of analyzing the existing models of hazard risk assessment, indicating the purpose, process and methodologies. Secondly based on the analysis a comparison of the basic profile has taken into practice, and the advantages and limitations of the models are discussed. Finally, associating with the impacts of storm surges that affect China, we bring up a research direction that leads to further studies.

Abstract: A new approach to risk assessment of storm surge and prediction problems was suggested. The model is based on the Extended Kalman Filter (EKF) equations, which simply linearises all nonlinear models so that the traditional Kalman filter can be applied. Key factors describing storm surge disasters are considered in the model. Numerical simulations were carried out and tested with some actual observations of recent storm surge events and related damages in coastal regions of China. The results show a reasonable fit for storm surge disaster prediction and encourage the possibility of using the method for future studies.

Abstract: There are many combustible materials in building furniture stores with complex people traffic and high risk of fire disaster. Fire load as the represent of flammable material, and the building fire risk can be grasped by the data obtained. Through investigation and statistics on the fire load density value of building furniture store, it is convenient for performance fire safety design. According to the survey, fire load density average value is determined of 382.71 , the standard deviation is of 143.46 . After fitting the survey data, the data distribution do not refuse to obey the extreme-value Idistribution, so this distribution can be the basis of fire design in other corresponding building furniture stores.

Abstract: The developed rigid polyurethane foam is added several inorganic materials, which made the polyurethane foam release less poisonous gases in fire. The oxygen index value can reach more than 32 percent, and under the standard heating curve the retardant rigid polyurethane foam can present the performance of 1h fire resistance test.

Abstract: Based on the concept of Life Cycle Cost, we propose a methodology to evaluate the expected economic loss of building caused by tornado disasters during design service time and this methodology is examined by applying to a simplified nuclear power plant main house model.

Abstract: Wind load computation formula for transmission tower of 《Technical code for the design of tower and pole structures of overhead transmission line》 and 《Design of latticed steel transmission structures》 are studied in this paper. The differences of basic wind speed, height variation factor of wind pressure, shape factor and wind load factor are compared in detail, respectively. The results show that the wind load defined in the Chinese code is little different from the American code. However, some parameters are still worthy of further discussion. The analysis results can be a reference for the design of transmission tower.

Abstract: Landslide susceptibility zonation is one of the research hotspots in the field of landslide research. It is important in the process of disaster prevention and land planning. Select Wan Zhou as study area; it is one portion of the Three Gorges Reservoir Area. According to existing landslide statistical data, select lithology, slope gradient, slope structure and reservoir grade as impact factors. Use analytic hierarchy process and information method to calculate weighted value of each factor respectively, and then combine them. The landslide susceptibility zonation was done by ArcGIS. This method can unite the advantages of the disaster data and expert experience. According to statistics, result accuracy rate is 90.3%.The key area of landslide disaster prevention can be obtained from the landslide susceptibility zonation map.