高速公路桥墩优选方案抗震特性分析

发布时间：2018-06-01 14:20

本文选题：时程分析 + 反应谱　；参考：《华东交通大学》2014年硕士论文

【摘要】：随着全国基础建设的完善和高速公路网的建立，高速公路上出现大量高墩桥梁，桥墩形式也多种多样，主要包括双柱式桥墩、空心薄壁墩、重力式桥墩，这些不同桥墩形式适用于不同高度，然而墩高为30米至35米的双柱式桥墩由于其较好地正常使用承载力、施工方便、经济性及稳定性好而广泛用于高速公路桥梁中。然而我国地域处于地震多发带，桥梁作为生命线工程将接受地震的考验；最近发生的地震给人们造成惨重的代价，部分桥梁出现落梁、整体倒塌及桥墩剪切等破坏现象，这让人们不禁想起桥梁结构的抗震性能重要性。本文将基于《高速公路桥高墩结构形式分析研究》[1]文章研究基础之上进行抗震分析，即对双柱式高墩进行抗震研究。主要研究的内容包括有： (1)本文结合奉新至铜鼓高速公路段进行抗震分析，，以带溪高架桥为研究对象，采用不同有限元分析方法对桥梁进行抗震分析，主要包括时程分析法、反应谱法及pushover法；并结合规范对计算结果进行验算，得到双柱式桥墩的抗震性能；以及对三种常见抗震分析法的计算结果进行对比。 (2)通过调整桥梁的约束探讨不同支座对高墩桥梁抗震和稳定性的影响。结果表明盆式支座对高墩桥梁有较好的减震和稳定性效果。 (3)研究了桥墩刚度对桥梁的振动影响，主要探讨了桥墩高度、截面形式、桥梁刚度分布不均对抗震的影响。
[Abstract]:With the improvement of national infrastructure and the establishment of highway network, there are a large number of high-pier bridges on the highway, and the types of piers are also varied, including two-column piers, hollow thin-walled piers, gravity piers, etc. These types of piers are suitable for different heights. However, the double-column piers, which are 30 to 35 meters in height, are widely used in highway bridges because of their good normal operation capacity, convenient construction, good economy and good stability. However, the region of our country is in the earthquake-prone zone, bridges as lifeline projects will be tested by earthquakes, the recent earthquakes have caused heavy costs to people, some bridges have fallen beams, collapsed as a whole, and bridge piers have been shearing, and so on. This reminds us of the importance of seismic performance of bridge structures. In this paper, the aseismic analysis is carried out on the basis of the study of the structural form of the high pier of expressway bridge, I. e., the aseismic analysis of the high pier with two columns. The main contents of the study include: Based on the seismic analysis of Fengxin-Tonggu Expressway, different finite element analysis methods are used to analyze the earthquake resistance of the bridge, including time-history analysis method, response spectrum method and pushover method. The seismic performance of double-column piers is obtained by checking the calculation results according to the code, and the calculation results of three kinds of common seismic analysis methods are compared. The influence of different supports on seismic resistance and stability of high pier bridges is discussed by adjusting the constraints of bridges. The results show that the basin bearing has better shock absorption and stability effect on the bridge with high piers. The influence of pier stiffness on bridge vibration is studied, and the influence of pier height, section form and uneven distribution of bridge stiffness on earthquake resistance is mainly discussed.
【学位授予单位】：华东交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.22;U442.55

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