潮汐交通对城市独柱墩桥梁结构安全影响分析研究

发布时间：2018-07-02 21:32

本文选题：独柱桥墩桥梁 + 潮汐交通　；参考：《贵州大学》2015年硕士论文

【摘要】：由于独柱墩桥梁的结构受力的特殊性和复杂性,同时加上对于独柱墩桥梁在潮汐交通下的倾覆倒塌安全稳定性事故研究资料有相当的稀少,因此本文有必要根据实际独柱墩桥梁,将从潮汐交通对独柱墩桥梁导致的静力效应和动力效应来分别对独柱墩桥梁的安全稳定性进行分析研究。着重展开以下方面的研究:本文通过有限元软件ABAQUS对不同组合潮汐交通对城市独柱墩桥梁结构的静力效应和动力效应,找出对城市独柱墩桥梁结构安全性有影响的要素。本文得到的结论如下:(1)潮汐交通考虑发动机怠速下的动力效应的数据反映出与潮汐交通的静力效应基本一致的规律。而且当全部由三轴重型车组成非常规潮汐交通导致的动力荷载效应是上述其他车辆组成的潮汐交通流模型中动力荷载效应最大的。(2)潮汐交通考虑发动机怠速下的动力效应和不考虑怠速情况下的静力效应其规律为:三轴重型车辆的动力荷载效应两轴重型车辆的动力荷载效应大型客车的动力荷载效应小型客车的动力荷载效应。(3)潮汐交通考虑发动机怠速下的动力效应与相同潮汐交通组合下不考虑怠速情况下的静力效应要大很多,对潮汐交通作用在独柱墩桥梁上时候,不仅要考虑潮汐交通对独柱墩桥梁的静力荷载效应影响,同时要考虑怠速情况下的动力荷载效应对独柱墩桥梁的影响。本文的研究不但对于减少或者尽量避免上述事故的发生问题具有预防的实际意义,在一定程度上也可以对独柱墩桥梁有一个更加深入的了解,同时也可以通过综合考虑影响独柱墩桥梁的安全稳定性要素,在设计或者交通管制中明确地针对这些不利要素来减少或者尽量避免此类事件的发生,从而使独柱墩桥梁更能发挥出其对城市经济发展的积极贡献。
[Abstract]:Because of the particularity and complexity of the single column pier bridge structure, and the research data of the toppling collapse safety and stability accident of the single column pier bridge under tidal traffic, Therefore, it is necessary to analyze the safety and stability of single-column pier bridge based on the static and dynamic effects caused by tidal traffic. The following aspects are emphatically studied: in this paper, the static and dynamic effects of different combinations of tidal traffic on the structure of urban single-pier bridges are studied by using the finite element software Abaqus, and the factors that affect the safety of urban single-pier bridges are found out. The conclusions obtained in this paper are as follows: (1) the data of tidal traffic considering the dynamic effect of engine idle speed reflect the law that is basically consistent with the static effect of tidal traffic. Moreover, when the dynamic load effect caused by the unconventional tidal traffic composed of all three axle heavy vehicles is the largest in the tidal traffic flow model composed of the other vehicles mentioned above. (2) the tidal traffic considering engine idling speed has the largest dynamic load effect. (2) Tidal traffic takes into account the idling speed of the engine. Dynamic effect and static effect without considering idling the law is: dynamic load effect of three-axle heavy vehicle dynamic load effect of two-axle heavy vehicle dynamic load effect of large bus dynamic load effect of minibus It is suggested that (3) the dynamic effect of the engine at idle speed in tidal traffic is much greater than that in the same combination of tidal traffic without considering idling speed. When the tidal traffic is acting on a single column pier bridge, not only the influence of tide traffic on the static load effect of the single column pier bridge should be considered, but also the influence of the dynamic load effect on the single column pier bridge under the condition of idle speed should be considered. The research in this paper not only has practical significance in reducing or avoiding the above problems, but also has a deeper understanding of the bridge with single column pier to a certain extent. At the same time, by synthetically considering the factors affecting the safety and stability of single-pier bridges, we can explicitly address these adverse factors in the design or traffic control to reduce or avoid the occurrence of such incidents as far as possible. So that the single pier bridge can play its positive contribution to the urban economic development.
【学位授予单位】：贵州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441

【参考文献】