双圆柱墩桥梁抗震设计方法研究

发布时间：2018-01-15 06:36

本文关键词：双圆柱墩桥梁抗震设计方法研究　出处：《郑州大学》2014年硕士论文　论文类型：学位论文

【摘要】：桥梁是交通运输中的关键枢纽,一旦遇到地震破坏,将给震后救灾恢复工作和地震应急带来极大的难度。因此,对于地震区的桥梁来说,做到事先预防十分重要。作为桥梁设计人员,要恰当地确定桥梁抗震的设防目标,根据桥梁抗震的设防目标进行抗震设计,正确的评估桥梁的抗震性能,对达不到抗震要求的桥梁提出加固改造措施。基于桥梁抗震设计的重要性和必要性,本文对高速公路常用的双柱式桥梁的抗震进行了深入研究,具体内容如下：1、本文对地震的分类进行了系统的介绍,详细的介绍了桥梁主要的震害形式,对我国公路桥梁抗震的需要作了进一步的强调。2、对桥梁抗震设计方法、桥梁抗震性能评估的方法和pushover方法的原理、假定、步骤进行了详细的阐述。3、采用MIDAS软件建立模型,分析不同侧向加载模式和边界条件对pushover方法的影响。4、采用pushover方法对一座中桥和一座大桥桥墩的抗震性能进行评估,通过计算来评估桥墩的结构变形和抗剪强度是否满足抗震设计要求。
[Abstract]:Bridge is the key hub in transportation. Once it is damaged by earthquake, it will bring great difficulty to the disaster relief and recovery work and earthquake emergency. Therefore, for the bridge in earthquake area. It is very important to prevent in advance. As a bridge designer, it is necessary to properly determine the seismic fortification target of the bridge, according to the seismic target of the bridge seismic design, and correctly evaluate the seismic performance of the bridge. Based on the importance and necessity of aseismic design of bridges, the aseismic behavior of two-column bridges commonly used in expressway is deeply studied in this paper. The specific contents are as follows: 1. This paper systematically introduces the classification of earthquakes, introduces in detail the main earthquake damage forms of bridges, and makes further emphasis on the need of earthquake resistance of highway bridges in China. The aseismic design method of bridge, the evaluation method of seismic performance of bridge and the principle of pushover method are discussed in detail. The model is built with MIDAS software. The influence of different lateral loading modes and boundary conditions on pushover method is analyzed. The seismic performance of a middle bridge and a bridge pier is evaluated by pushover method. The structural deformation and shear strength of pier are evaluated by calculation.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55

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