鱼梁河大桥桥梁结构设计稳定性与承载能力分析

发布时间：2018-08-17 09:08

【摘要】：随着高速公路在山区快速发展,大量的连续刚构桥在山区中进行施工建设。连续刚构桥大部分采取悬臂浇筑的施工方式,由于受到约束条件比较少以及多种不利施工因素的影响,在桥梁施工过程中,桥梁的结构稳定性成为施工关注的关键点。本文通过以鱼梁河大桥为工程背景,就桥梁的结构稳定性与承载能力进行了分析,本文主要完成了以下主要内容：(1)在鱼梁河大桥施工过程中,对于T型结构的桥梁的悬臂浇筑环节与最大悬臂情形下,研究了不同载荷对该结构稳定性的影响,通过计算结果分析得到风载荷对桥梁的稳定性影响不大,且在施工的环节由于挂篮跌落与不均匀自重的影响,必须进行浇注速度与锚固的控制,严格控制最大悬臂状态,有效地控制桥梁的稳定性。(2)在桥梁的使用环节,通过人群载荷与汽车载荷在连续刚构桥上的共同影响进行弯曲模态分析与稳定系数的确定。通过计算分析得到,在桥梁的运行过程中,稳定性系数最小位于活载处。同时桥梁的合拢方式与桥梁体系转换影响桥梁稳定性。
[Abstract]:With the rapid development of expressway in mountainous area, a large number of continuous rigid frame bridges are constructed in mountainous area. Most of continuous rigid frame bridges are constructed by cantilever pouring. Due to the limited constraints and many unfavorable construction factors, the structural stability of the bridge becomes the key point in the construction of the bridge. Taking the Yulianghe Bridge as the engineering background, this paper analyzes the structural stability and bearing capacity of the bridge. The main contents of this paper are as follows: (1) in the construction process of the Yulianghe River Bridge, The influence of different loads on the stability of T-shaped bridge is studied under the condition of cantilever pouring and maximum cantilever. The results show that the wind load has little effect on the stability of the bridge. Because of the drop of hanging basket and uneven weight, the pouring speed and anchoring must be controlled, the maximum cantilever state should be strictly controlled, and the stability of the bridge should be controlled effectively. (2) in the use of the bridge, it is necessary to control the stability of the bridge by strictly controlling the maximum cantilever state. (2) in the use of the bridge, The bending mode analysis and stability coefficient are determined by the common influence of crowd load and vehicle load on the continuous rigid frame bridge. Through the calculation and analysis, it is found that the minimum stability coefficient is located at the live load during the operation of the bridge. At the same time, the bridge closure and bridge system transformation affect the stability of the bridge.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.5

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