钢筋混凝土桥墩抗震延性分析

发布时间：2018-05-19 03:15

本文选题：钢筋混凝土桥墩 + 延性抗震　；参考：《安徽理工大学》2014年硕士论文

【摘要】：桥墩作为桥梁的重要结构部分,其损坏常造成全桥的破坏。根据延性抗震的理念,在强震作用下,墩柱作为延性构件应具有足够塑性变形能力,能产生塑性铰区,通过产生弹塑性变形来耗散地震能量,允许发生一定程度的损伤但不至于破坏。可见,对桥梁墩柱进行延性抗震设计其意义重大。本文采用理论分析与工程实例相结合的方法,以利川市佛宝山旅游公路工程中的四号桥为工程背景,对钢筋混凝土柱式桥墩开展延性抗震设计的研究。本文的研究内容主要包含以下几方面： (1)通过查阅资料了解现阶段桥梁抗震设防的现状,并进一步深入研究学习延性抗震设计理论,根据延性抗震理念确立所选用的延性指标及其参数； (2)分析确定钢筋混凝土桥墩材料的本构关系以及钢筋混凝土桥墩塑性绞区特性,选用合理的简化模型,理论上初步确定对钢筋混凝土柱式桥墩延性性能有影响的潜在因素； (3)利用桥梁结构分析软件Midas/Civil对影响普通钢筋混凝土墩柱和高墩延性性能的潜在因素进行模拟分析,通过对比得出结论,提出改良措施,从而优化钢筋混凝土墩柱的结构设计； (4)对利川市佛宝山旅游公路工程中的四号桥进行整桥模型的反应谱抗震分析,着重验算墩柱的抗震性能。通过对上述内容的研究分析,得知各潜在因素对钢筋混凝土墩柱延性性能的影响,进而优化钢筋混凝土墩柱的结构设计,提高桥墩延性性能,以利于桥梁结构的抗震,为后续桥梁的抗震设计和桥墩的延性抗震分析提供参考依据。此外,通过对整桥模型的反应谱分析可知,利川市佛宝山旅游公路工程中的四号桥满足延性抗震的设计要求,为该桥实际抗震分析提供理论依据。
[Abstract]:As an important part of bridge structure, the damage of piers often causes damage to the whole bridge. According to the idea of ductile earthquake resistance, the pier column as a ductile member should have enough plastic deformation ability to produce plastic hinge area and dissipate seismic energy by producing elastic-plastic deformation under the action of strong earthquake. A certain degree of damage is allowed but not damaged. Therefore, the ductile seismic design of bridge pier is of great significance. In this paper, the method of combining theoretical analysis with engineering examples is used to study the ductile seismic design of reinforced concrete column pier with the background of No.4 Bridge in Fobaoshan tourist Highway Project of Lichuan City. The research content of this paper mainly includes the following aspects: 1) to understand the present situation of seismic fortification of bridges at this stage, and to further study the theory of ductile seismic design, and to establish the selected ductility index and its parameters according to the concept of ductile seismic design. (2) analyzing and determining the constitutive relation of reinforced concrete pier material and the characteristics of plastic twist zone of reinforced concrete pier, selecting reasonable simplified model, and theoretically determining the potential factors that have influence on the ductility of reinforced concrete column pier; 3) using the bridge structure analysis software Midas/Civil to simulate and analyze the potential factors that affect the ductility performance of the ordinary reinforced concrete pier column and the high pier. The conclusion is drawn through the comparison, and the improvement measures are put forward to optimize the structural design of the reinforced concrete pier column. (4) the response spectrum seismic analysis of the whole bridge model is carried out on the 4th Bridge of Fobaoshan tourist Highway Project in Lichuan City, with emphasis on the seismic performance of the pier column. Through the research and analysis of the above contents, the influence of various potential factors on the ductility of reinforced concrete pier column is obtained, and then the structural design of reinforced concrete pier column is optimized, and the ductility performance of bridge pier is improved, which is beneficial to the earthquake resistance of bridge structure. It provides reference for seismic design of subsequent bridges and ductile seismic analysis of piers. In addition, through the response spectrum analysis of the whole bridge model, it can be seen that the No. 4 bridge in the Fobaoshan tourist highway project in Lichuan city meets the design requirements of ductile seismic resistance, which provides a theoretical basis for the practical seismic analysis of the bridge.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.22;U442.55

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