预应力混凝土连续梁桥抗震性能分析

发布时间：2018-05-11 09:32

本文选题：预应力混凝土连续梁桥 + Midas　；参考：《暨南大学》2014年硕士论文

【摘要】：近几十年的地震灾害表明，城市化进程伴随着人口的大量聚集，对交通线的依赖性表现的越来越明显，地震发生造成的交通线破坏和生命财产损失不可估量。历史上多次破坏性地震一再显示了桥梁工程生命线的意义，地震发生时，桥梁各部分结构的表现，关乎桥梁结构整体的安全性。就目前而言，预应力混凝土连续梁桥仍占很大比重，而地震发生的时间、空间和强度特征不仅随时间变化，并具有明显的随机性，以目前的技术条件和观测水平，仍不能对地震的发生做出准确判断。因此，预应力混凝土连续梁桥在地震作用下的抗震性能分析显得尤为必要。本文主要利用有限元软件Midas civil分析预应力混凝土连续梁桥的抗震性能。以九江七里湖大桥为研究对象，建立空间有限元结构模型，从不计桩土结构和考虑桩土结构两个方面，选择反应谱法和时程分析法对桥梁结构进行分析，并考虑了预应力的影响。在E1反应谱、Elcent波和Taft波作用下，从位移和内力方面分析了桥梁结构的地震响应。本文的抗震分析结果，，在同类预应力混凝土连续梁桥中可采用类似方法，对预应力混凝土连续梁桥的设计与建造具有一定参考意义。
[Abstract]:The earthquake disaster in recent decades shows that the process of urbanization is accompanied by a large number of population accumulation, the dependence on traffic lines is becoming more and more obvious, and the damage of traffic lines caused by earthquakes and the loss of life and property are incalculable. Many destructive earthquakes in history have shown the significance of bridge engineering lifeline again and again. When the earthquake occurs, the performance of each part of bridge structure is related to the safety of bridge structure as a whole. At present, prestressed concrete continuous beam bridges still account for a large proportion, and the time, space and strength characteristics of earthquakes not only change with time, but also have obvious randomness, according to the present technical conditions and observation level, It is still impossible to make an accurate judgment on the occurrence of the earthquake. Therefore, it is necessary to analyze the seismic behavior of prestressed concrete continuous beam bridge under earthquake. In this paper, the finite element software Midas civil is used to analyze the seismic behavior of prestressed concrete continuous beam bridge. Taking the Qilihu Bridge of Jiujiang River as the research object, the spatial finite element structural model is established. The response spectrum method and time history analysis method are selected to analyze the bridge structure from the two aspects of disregarding the pile-soil structure and considering the pile-soil structure. The influence of prestress is considered. Under the action of E1 response spectrum Elcent wave and Taft wave, the seismic response of bridge structure is analyzed in terms of displacement and internal force. The results of seismic analysis in this paper can be used in the similar prestressed concrete continuous beam bridges with similar methods, which has a certain reference significance for the design and construction of prestressed concrete continuous beam bridges.
【学位授予单位】：暨南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55

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