简支变连续梁桥抗震性能研究
发布时间：2018-08-26 08:53
【摘要】：随着我国交通运输工程事业的迅速发展，简支变连续梁桥以其独特具有的经济性、安全性和施工方便性在桥梁工程中得到普遍应用。近些年来，地震多次发生，而桥梁作为重要的生命线工程之一，在抗震救灾中起到的作用不言而喻，因此，，对简支变连续梁桥的抗震性能进行研究具有很大的现实意义。 我国现适用的桥梁工程抗震细则对多种类型桥梁的设计方法、抗震设防标准等有明确的说明，但对简支变连续梁桥的抗震设计理论没有针对性的规定，缺乏相应的设计参考依据，且最近几年来新建的简支变连续梁桥，几乎都没有经历过强震的检验，所以其震害资料十分匮乏，没有高烈度地震作用下的抗震使用经验。 本文以某五跨预应力简支变连续箱梁桥为研究背景，依据简支变连续梁桥的研究现状和地震响应理论，建立结构振动方程，借助有限元分析软件ANSYS，对模型进行动力特性分析，进而利用弹性动态时程分析法研究简支变连续梁桥的抗震性能，其次通过对变化桥梁跨数、跨径、桥墩高度和刚度的简支变连续梁桥模型研究，总结这些参数对此种桥型地震反应的影响，根据分析结果，得出合理的简支变连续梁桥结构的抗震设计建议。 通过对简支变连续梁桥抗震性能的研究，为其设计理论的完善、有效抗震措施的提出和震后病害桥梁的加固具有较大的社会意义和工程应用价值。
[Abstract]:With the rapid development of transportation engineering in China, simply supported variable continuous beam bridges are widely used in bridge engineering with their unique economy, safety and construction convenience. In recent years, earthquakes have occurred many times, and bridge, as one of the important lifeline projects, plays a self-evident role in earthquake relief, so it is of great practical significance to study the seismic behavior of simply supported continuous beam bridge. The aseismic rules of bridge engineering in our country have a clear explanation on the design methods and seismic fortification standards of various types of bridges, but there are no specific provisions for the seismic design theory of simply supported variable continuous beam bridges. There is no corresponding reference for design, and in recent years, almost all of the newly built simply supported and continuous girder bridges have not been tested by strong earthquakes, so the seismic damage data are very scarce, and there is no seismic application experience under the action of high intensity earthquakes. Based on the research background of a five-span prestressed simply supported variable continuous box girder bridge and based on the research status and seismic response theory of the simply supported variable continuous beam bridge, the structural vibration equation is established in this paper, and the dynamic characteristics of the model are analyzed with the help of finite element analysis software ANSYS,. Then the seismic behavior of simply supported variable continuous beam bridge is studied by means of elastic dynamic time history analysis. Secondly, the model of simply supported variable continuous beam bridge with variable span, pier height and stiffness is studied. The influence of these parameters on the seismic response of this bridge type is summarized. According to the analysis results, reasonable seismic design suggestions for the structure of simply supported variable continuous beam bridge are obtained. Based on the study of seismic performance of simply supported variable continuous beam bridge, it is of great social significance and engineering application value to perfect the design theory, to put forward effective seismic measures and to strengthen the damaged bridge after earthquake.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55
本文编号：2204355
[Abstract]:With the rapid development of transportation engineering in China, simply supported variable continuous beam bridges are widely used in bridge engineering with their unique economy, safety and construction convenience. In recent years, earthquakes have occurred many times, and bridge, as one of the important lifeline projects, plays a self-evident role in earthquake relief, so it is of great practical significance to study the seismic behavior of simply supported continuous beam bridge. The aseismic rules of bridge engineering in our country have a clear explanation on the design methods and seismic fortification standards of various types of bridges, but there are no specific provisions for the seismic design theory of simply supported variable continuous beam bridges. There is no corresponding reference for design, and in recent years, almost all of the newly built simply supported and continuous girder bridges have not been tested by strong earthquakes, so the seismic damage data are very scarce, and there is no seismic application experience under the action of high intensity earthquakes. Based on the research background of a five-span prestressed simply supported variable continuous box girder bridge and based on the research status and seismic response theory of the simply supported variable continuous beam bridge, the structural vibration equation is established in this paper, and the dynamic characteristics of the model are analyzed with the help of finite element analysis software ANSYS,. Then the seismic behavior of simply supported variable continuous beam bridge is studied by means of elastic dynamic time history analysis. Secondly, the model of simply supported variable continuous beam bridge with variable span, pier height and stiffness is studied. The influence of these parameters on the seismic response of this bridge type is summarized. According to the analysis results, reasonable seismic design suggestions for the structure of simply supported variable continuous beam bridge are obtained. Based on the study of seismic performance of simply supported variable continuous beam bridge, it is of great social significance and engineering application value to perfect the design theory, to put forward effective seismic measures and to strengthen the damaged bridge after earthquake.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55
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本文编号：2204355
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