反应位移法在地下结构抗震设计中的应用

发布时间：2018-03-14 04:14

本文选题：地下结构　切入点：抗震设计　出处：《中原工学院》2017年硕士论文　论文类型：学位论文

【摘要】：随着我国人口的快速增长和社会经济的飞速发展,日益严重的交通拥堵已成为众多城市的通病,地铁已经成为缓解交通压力、推动城市发展的有效手段之一。以往的地震灾害表明,地铁等地下结构一旦受到地震破坏,将会造成重大的人员伤亡和财产损失,并且地铁等地下结构完全埋深于土中,这使得震后结构修复工作存在一定的困难。因此,对地铁等地下结构抗震问题进行研究,对减少震害损失,保障人民财产安全具有重要意义。本文首先通过介绍反应位移法的基本原理,给出该法的求解过程:首先借助一维土层地震反应分析,获得各个土层在地震动荷载下作用下的动力反应,然后建立结构的计算模型,进行结构抗震计算。然后以郑州轨道交通3号线农业东路车站为研究对象,通过借助一维土层地震反应程序EERA,求解地下车站结构所在土层在地震动荷载作用下的动力反应。再通过对车站结构所在土层进行不同的厚度分层,分析了地层反应计算中土层分层厚度对结果的偏差影响。应用反应位移法和时程法对同一地铁车站进行抗震分析,通过比较两种方法的计算过程,并分析比较两种方法所得出关键节点水平位移,说明反应位移法在应用于指导工程实践的优越性。本文最后应用反应位移法对郑州轨道交通3号线地铁区间进行了震害分析。
[Abstract]:With the rapid growth of population and the rapid development of social economy, increasingly serious traffic congestion has become a common problem in many cities. Subway has become a relief of traffic pressure. Earthquake disasters have shown that underground structures such as subways will cause heavy casualties and property losses once they are damaged by earthquakes, and underground structures such as subways will be completely buried deeper than the earth. As a result, it is difficult to repair the structures after the earthquake. Therefore, the earthquake resistance of underground structures such as subways is studied in order to reduce the damage caused by the earthquake. It is of great significance to ensure the safety of people's property. Firstly, by introducing the basic principle of the reactive displacement method, the solution process of the method is given. Firstly, the seismic response analysis of one-dimensional soil layer is used. The dynamic response of each soil layer under the action of ground motion is obtained, and then the calculation model of the structure is established, and the seismic calculation of the structure is carried out. Then, the station of Agricultural East Road of Zhengzhou Rail Transit Line 3 is taken as the research object. By means of the one-dimensional soil layer seismic response program EERA, the dynamic response of the soil layer of the underground station structure under the action of ground motion load is solved, and the different thickness stratification of the soil layer in which the station structure is located is carried out. In this paper, the effect of stratified layer thickness on the result of stratum response calculation is analyzed. The seismic analysis of the same subway station is carried out by using the reactive displacement method and the time-process method, and the calculation process of the two methods is compared. The horizontal displacement of the key nodes obtained by the two methods is analyzed and compared, and the superiority of the reactive displacement method in guiding engineering practice is explained. Finally, the earthquake damage analysis of the subway section of Zhengzhou Rail Transit Line 3 is carried out by using the reactive displacement method.
【学位授予单位】：中原工学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU93

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