基于粘滞阻尼器梁桥桥墩的减震设计与分析

发布时间：2018-03-10 14:28

本文选题：桥墩　切入点：粘滞阻尼器　出处：《昆明理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来伴随着大量基础设施的修建,各式桥梁在不同地震烈度区得到了广泛的应用。地震等特大自然灾害频繁的发生,带来了巨大的损失与风险,更加凸显了对抗震研究分析工作的迫切性与严峻性。桥梁作为道路系统的关键和控制部位,在现代交通中占有着重要地位和发挥着重要作用,因此必须保证其在地震响应下的可靠性与安全性。我国属于世界上地震频发的国家之一,又是一个多山地的国家,越来越多的专家和学者更加重视对提高桥梁结构的抗震性能的研究,特别是高墩抗震的研究。其中,减隔震技术是提高结构抗震性能非常有效的一种方式,在桥梁结构中加入阻尼器等耗能减震的装置,被认为是一种新型、安全、经济、有效的减隔震方法。由于阻尼器自身的安全性能好,施工方便、造价低、对环境污染小、减震效果好等优点,被各国的专家和学者所认可,在提高结构抗震性能方面有着非常广阔的发展前景。本文首先对粘滞阻尼器的内部构造、工作原理与力学计算模型进行了介绍与推导,对桥梁结构在地震响应下的动力分析理论知识进行了简单阐述;其次以云南省内某高速公路桥梁为背景,运用大型有限元软件MIDAS/CIVIL建立了有限元模型,对其进行动力时程分析,主要完成以下工作:(1)介绍了国内外桥梁减隔震方面的发展与研究现状,阐述了粘滞阻尼器的工作原理,陈述了设置有粘滞阻尼器的桥梁结构在地震响应下的计算方法。(2)以某连续梁桥为工程实例背景,介绍了运用大型有限元软件MIDAS/CIVIL的建模过程,并进行了自振特性计算。(3)研究了粘滞阻尼器在桥墩上的设计方案,首先只分析桥墩模型并找出了一种比较理想的布置阻尼器的方案,然后再把这种布置方案运用到全桥模型中,运用动力时程分析方法对其有限元模型进行对比分析,研究在桥墩上布置粘滞阻尼器对桥墩抗震性能的影响。
[Abstract]:In recent years, with the construction of a large number of infrastructure, all kinds of bridges have been widely used in different seismic intensity areas. Bridge, as the key and control part of road system, plays an important role in modern traffic. Therefore, it is necessary to ensure its reliability and safety under the earthquake response. China is one of the countries with frequent earthquakes in the world, and is also a mountainous country. More and more experts and scholars pay more and more attention to the research of improving the seismic performance of bridge structure, especially the research of seismic resistance of high pier. It is considered as a new, safe, economical and effective isolation method to add dampers and other energy dissipation devices to bridge structures. Because the dampers have good safety performance, easy construction, low cost and low pollution to the environment, the dampers have good safety performance, easy construction, low cost, and low pollution to the environment, because of their good safety performance, easy construction, low cost, low cost, and low pollution to the environment. The advantages of good damping effect have been recognized by experts and scholars all over the world. It has a very broad development prospect in improving the seismic performance of structures. In this paper, first of all, the internal structure of viscous dampers is discussed. The working principle and mechanics calculation model are introduced and deduced, and the theoretical knowledge of dynamic analysis of bridge structure under earthquake response is simply expounded. Secondly, a highway bridge in Yunnan Province is taken as the background. The finite element model is established by using the large-scale finite element software MIDAS/CIVIL, and the dynamic time history analysis is carried out. The following work is mainly done: 1) the development and research status of bridge isolation and isolation at home and abroad are introduced, and the working principle of viscous damper is expounded. In this paper, the calculation method of bridge structure with viscous dampers under earthquake response is described. Taking a continuous beam bridge as an engineering example, the modeling process of a large finite element software MIDAS/CIVIL is introduced. The design scheme of viscous damper on bridge pier is studied. Firstly, the model of bridge pier is analyzed and an ideal scheme of layout damper is found, and then the layout scheme is applied to the whole bridge model. The dynamic time history analysis method is used to compare and analyze the finite element model, and the influence of the viscous dampers on the seismic performance of the pier is studied.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.55

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