铁路综合交通换乘枢纽的雷电灾害风险评估方法研究

发布时间：2018-07-05 13:53

本文选题：雷电灾害风险评估 + 铁路综合交通枢纽　；参考：《兰州大学》2013年硕士论文

【摘要】：铁路综合交通换乘枢纽具有建设规模大、人员密集和电磁敏感程度高等特点,防雷安全责任重大,但目前尚缺乏针对该对象的雷电灾害风险评估方法。本文提出了一套铁路综合交通换乘枢纽的雷电灾害风险评估方法,并在吉林省雷电灾害及活动特征分析基础上,以长春西客站综合交通换乘中心为例进行了方法的应用。主要研究结果如下： (1)以层次分析法为主,结合加权综合法提出了一套铁路综合交通换乘枢纽的雷电灾害风险评估方法。该方法辨识了10个风险影响因子,即县(市)雷灾易损度、地形、土壤电阻率、雷电强度、雷电密度、雷电流绕击率、区域人员雷击易损度、建筑物经济雷击易损度、建筑物防雷类别和建筑物电子信息系统雷电防护等级,并建立了各因子的赋值方法。在上述因子赋值中,特别给出了雷击建筑物导致物理损害的概率PB、雷击建筑物导致物内部系统失效的概率Pc评估的子方法,以及区域闪电筛选方法。 (2)吉林省的雷电灾害风险由强到低呈现出由中部向周边递减的结构,强风险区主要位于吉林省中部和南部的地级市辖区,高风险区主要位于中部和南部经济发展水平相对较高的县(市),中风险区和低风险区则主要集中于东部山区和西部平原地区。吉林省雷电密度呈中南部稍高,东西部偏低的特征,多年平均值为3.0次·km-2·a-1,雷电流幅值多为20～40kA。长春市雷电密度平均值为3.1次·km-2·a-1,略高于全省多年平均值。长春市雷灾易损度值为0.682,处于雷电灾害强风险区。 (3)长春西客站综合交通换乘中心的雷电灾害风险为低级别,其排序前三名风险因子分别为区域雷电密度,项目所在县(市)雷灾易损度和区域人员雷击易损度。该中心的建筑物内部人员生命损失风险、内部经济损失风险在经验值范围内,而-6.5m及-12m层集散广场、-6.5m层公交停车场人员雷击易损性高于其他区域,需对现有防雷装置和措施进一步完善。结果表明,本文提出的评估方法是科学合理的、具有较强的可操作性,可用于铁路综合交通换乘枢纽的选址及防雷措施完善指导。
[Abstract]:The railway integrated traffic transfer hub has the characteristics of large scale construction, dense personnel and high electromagnetic sensitivity, and has a heavy responsibility for lightning protection, but there is still a lack of lightning disaster risk assessment method for this object at present. This paper puts forward a set of risk assessment method of lightning disaster in railway integrated traffic transfer hub. Based on the analysis of lightning disaster and activity characteristics of Jilin Province, the paper takes the integrated traffic transfer center of Changchun West passenger Station as an example to carry on the application of the method. The main results are as follows: (1) based on the analytic hierarchy process (AHP) and combined with the weighted synthesis method, a set of lightning disaster risk assessment method for railway integrated traffic transfer hub is proposed. The method identified 10 risk factors, namely, county (city) lightning vulnerability, topography, soil resistivity, lightning intensity, lightning density, lightning current wound impact rate, area personnel lightning vulnerability, building economic lightning vulnerability. The lightning protection class of buildings and the lightning protection grade of building electronic information system are established, and the evaluation method of each factor is established. In the above factor assignment, the probability of physical damage caused by lightning strikes on buildings is given, and the probability of failure of internal systems caused by lightning strikes is given. And regional lightning screening methods. (2) the lightning disaster risk in Jilin Province from strong to low presents a decreasing structure from the middle to the periphery, and the strong risk areas are mainly located in the prefecture-level municipal areas in the central and southern parts of Jilin Province. The high risk areas are mainly located in the counties (cities) with relatively high level of economic development in the central and southern regions, while the middle and low risk areas are mainly concentrated in the eastern mountainous areas and the western plain areas. The lightning density of Jilin Province is slightly higher in the central and southern part, and lower in the east and west. The annual average value is 3.0times km-2 a-1, and the lightning current amplitude is mostly 200.40kA. The average lightning density in Changchun is 3.1 times km-2 a-1, which is slightly higher than the annual average of the province. In Changchun City, the vulnerability of lightning disaster is 0.682, which is in the high risk area of lightning disaster. (3) the risk of lightning disaster is low in the integrated traffic transfer center of Changchun West passenger Station, and the first three risk factors are the regional lightning density. The county (city) where the project is vulnerable to lightning disaster and regional personnel lightning vulnerability. The risk of loss of life and the risk of economic loss are within the range of experience, and the lightning vulnerability of the staff in the bus parking lot of -6.5m and -12m storeys is higher than that in other areas. The existing lightning protection devices and measures need to be further improved. The results show that the evaluation method proposed in this paper is scientific and reasonable and has strong maneuverability. It can be used to guide the location selection of railway integrated traffic transfer hub and the lightning protection measures.
【学位授予单位】：兰州大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U298;P427.3

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