Applied Mechanics and Materials Vols. 353-356

Abstract: Flood is a common natural disaster and has happened frequently in decade years with a huge number of fatalities and property damages. These hazards typically necessitate the evacuation of local or regional populations to safe destinations or shelters and require a cooperation and interdependent relationship of several departments and organizations. This paper proposes that an urban evacuation management system framework for a deluge catastrophe can be modeled through the relationships between five components of interest: 1) evacuation road-network service capability; 2) human risk-attitude; 3) public or private decision; 4) weather and flood disaster monitoring; 5) inter-transit between city systems. We extract data from the strategies and propose a framework for residential evacuation management. This framework model is set up to help the local government quickly model the situation of the whole evacuation procedures and progresses to choose an optimum alternative from all the solutions and by identifying potential bottlenecks on traffic evacuation network and allocating resources reasonably to evacuate residents more safely and economically.

Abstract: With the large-scale development of city underground space, all kinds of unexpected events in underground space have broken out in a rising trend. By analyzing the disaster-causing mechanism of city underground space emergencies, the vulnerability of city underground space and the early warning management mechanism of city underground space emergencies, this paper establish a risk management system of city underground space based on emergency to realize the harmonious development of city underground space.

Abstract: Chinas southeast coast is one of the regions with most severely influenced by typhoons in the world, which suffers significant casualties and huge economic losses every year. In this paper, the trends of economic loss educed by typhoon disaster in coastal areas of southeastern china were studied using regression analysis methods. Firstly, the data sources were introduced and the typhoon landing areas are all over the east coast of China were analyzed.Then, development trends of the affected area , deaths, houses collapsed and the direct economic losses were studied in detail. The results indicate that the affected area and deaths induced by typhoon disaster fluctuate greatly and the number of deaths has been showing a declining trend. The linear regression, exponential regression and logistic regression analysis results all indicate that the number of houses collapsed due to Typhoon present a downward trend year by year while the direct economic losses induced by typhoon disaster present an upward trend year by year.

Abstract: In general, reinforced concrete frames have excellent fire resistance properties, but more and more concrete buildings collapsed in fires. The majority of past research work on the response of concrete building to fire has looked at the effects of fire upon individual structural members, and most commonly when subjected to heating from standard fire tests. At present, the fire behaviors of whole reinforced concrete frame are not adequately understood. There is a great need for development of models which consider the effects of fire on the whole structure under more realistic heating regimes. There is also a fundamental requirement for further large-scale testing of concrete structures, to observe the behavior of whole concrete structures in real fires and also for validation of advanced computer analysis tools. Accuracy and efficiency are two major concerns in finite element analysis of structural response of concrete frames in fires. In this paper, a multi-type finite elements hybrid model for simulating structural behavior of whole reinforced concrete frames in real fire is suggested.

Abstract: With the development of InSAR technology ,many researchers begin to try to apply InSAR technology on trace deformation monitoring,In some areas of landslides, mining subsidence, city over collecting water surface subsidence, reservoir area surface subsidence and dam deformation monitoring have achieved good results. Now available satellite-borne SAR system can achieve theory monitoring accuracy in surface deformation monitoring , but because of a variety of error factors in reality , it often cant achieve the theory monitoring accuracy.This part is to introduce a way to remove the error factors-water vapor GPS detect method.

Abstract: The paper take Shanxi Province as the object of study, through the analysis of the type after shaking the Shanxi Province road secondary geology disaster, the distribution rule and send the disaster mechanism's investigation and the analysis, the Shanxi Province earthquake secondary disaster mainly have the pitch geology disaster, the mud-rock flow disaster as well as the roadbed cave in three broad headings. The paper selection earthquake intensity, the terrain slope, the ground type, the surface cutting density, the surface cutting depth, the vegetation, the drainage density, the rainfall amount and so on take the pitch geology disaster's risk evaluating indicator, established three has ordered by type lives the geological disaster risk evaluating indicator system and the rank division system, and determined each influencing factor the weight. Has completed each influencing factor topic chart level using the GIS technology, through the GIS spatial analysis function, the superimposition has completed each kind of disaster's risk factor index chart. Finally can obtained the figure of shaanxi roadbed disaster risk classification.

Abstract: Geological hazards especially for the dynamic disasters are proven to be the most difficult problems encountered in the deep underground projects. This paper attempts to deal with the geological problem faced by Shizhuyuan multi-ploy metallic mine base on the results of mechanics tests and numerical simulation. In order to understand the mechanism dynamic disasters, a new energy index, the Local Energy Release Rate (LERR), is put forward in the simulating process. By tracking the peak and valley values of elastic strain energy intensity before and after brittle failure, the LERR is set as an index to ascertain the scope of the high dangerous region. The results showed that LERR can satisfactorily predict the dangerous region, and it will be more accurate with some necessary monitoring method. The study indicates the potential of LERR for evaluating geological hazards in deep underground excavations.

Abstract: During the past decades, the microseismic technique has changed from a simple researching means for rock failure study to a practical method for daily safety monitoring at high geo-hazard tendency mines. This paper introduces the microseismic monitoring system built at a metal mine aiming at the prediction of the geological hazard. The arrangement of microseismic monitoring sensors should take consideration not only of the current mining situation, but also by the aid of experts experiences. By a successful case of prediction for hard brittle failure, the Shizhuyuan microseismic monitoring system was proven to be valid and necessary in the prediction of geological hazard.

Abstract: Based on the dynamic, nonlinear and feedback features of coalmine safety management control process, with the purpose of identifying the complex interdependence relationships of the various elements of coalmine safety management system, system dynamics (SD) is used as a tool to study coalmine safety management and control issues; to elaborate various elements related to safety benefit in the process of dynamic coalmine safety management and the relationships between them. The causal link between those factors and the systematic dynamics flow figure model are established by using the modeling and simulating software which is called VENSIM.

Abstract: Rockfalls are a constant danger to motorists and to highway facilities in mountainous terrain. Rockfall disaster displays some features such as wide distribution, much quantity, sudden occurrence, randomicity and strong fatalness. Against rockfall hazard along highway, there are two types of protection: passive ones and active ones. In present paper, the authors conduct a systematically summary of rockfall control measures along highway. Seven kinds of key active methods and six kinds of vital passive technologies to prevent and cure rockfall are presented. This review is of certain reference value for road maintenance in rocky mountains.