剑阁县剑门新区清江河景观廊桥季节温度效应分析

发布时间：2018-04-28 10:14

本文选题：廊桥 + 主拱圈　；参考：《重庆交通大学》2015年硕士论文

【摘要】：随着我国经济的快速发展和人们审美情趣的提高,全国各地在城市建设和旅游景区的开发过程中纷纷开始建设景观廊桥,以营造更加美好的环境氛围,不同的地域环境和文化属性,所建造的廊桥风格也不同。现代廊桥作为中国古典园林文化和科技进步的结晶,其跨度和规模越来越庞大,使用功能也更加广泛,桥梁与桥上房屋之间的关系也更趋复杂。当今,我国对景观廊桥的研究较少,而季节温度效应对廊桥影响的研究更少,由于廊桥是桥与房屋的结合体,其体表面积比一般桥梁大的多,因此,考虑温度对廊桥的影响是很必要的。本文以四川省剑阁县剑门新区清江河景观廊桥为工程背景,运用有限元分析软件MIDAS/CIVIL建立空间模型进行多种工况条件下的模拟,对比分析廊桥和同荷载条件拱桥受季节温度效应影响时其主拱圈、立柱、纵梁和桥墩等结构构件主要控制截面处内力和位移的变化规律,并根据这些规律提出相关建议和意见,供同类廊桥和拱桥的设计、施工、运营提供参考。按规范规定分别将温度荷载加载到廊桥和同荷载条件下的拱桥,发现二者在季节温度效应影响下均表现出随着季节温度线性变化其内力也线性改变的规律;温度上升使两种桥主拱圈上挠,温度下降使其主拱圈下挠,而且最大位移均发生在每个主拱圈的拱顶处。季节温度效应对廊桥内力和变形的影响大于同荷载条件下的拱桥。为了保证廊桥能更加安全、耐久的使用,设计时应该考虑温度效应对其造成的影响。
[Abstract]:With the rapid development of our country's economy and the improvement of people's aesthetic taste, in the process of urban construction and tourism scenic spot development, all over the country began to build landscape bridges one after another in order to create a more beautiful environmental atmosphere. Different regional environment and cultural attributes, the style of the bridge is also different. As the crystallization of the Chinese classical garden culture and the progress of science and technology, the modern gallery bridge is more and more extensive in span and scale, and the relationship between the bridge and the houses on the bridge is becoming more and more complicated. Nowadays, there are few researches on the landscape bridges in China, and less on the effects of seasonal temperature on the bridges. Because the bridges are the combination of bridges and houses, the surface area of the bridges is much larger than that of ordinary bridges. It is necessary to consider the influence of temperature on the bridge. Based on the engineering background of Qingjiang River Landscape Corridor Bridge in Jiange County, Sichuan Province, this paper establishes a spatial model by using finite element analysis software MIDAS/CIVIL to simulate the bridge under various working conditions. The variation laws of internal forces and displacements of main arch rings, columns, longitudinal beams and piers of the covered bridge and the arch bridge under the same load condition affected by the seasonal temperature effect are compared and analyzed, and the relevant suggestions and suggestions are put forward according to these laws. To provide reference for the design, construction and operation of similar covered bridges and arch bridges. According to the code, the temperature load is loaded into the bridge and the arch bridge under the same load condition, and it is found that both of them show the law that the internal force changes linearly with the seasonal temperature under the influence of the seasonal temperature effect. The temperature rise causes the two kinds of bridge main arch ring to flex up, and the temperature drop causes the main arch ring to deflect down, and the maximum displacement occurs at the top of each main arch ring. The effect of seasonal temperature on the internal force and deformation of the bridge is greater than that of the arch bridge under the same load. In order to ensure more safe and durable use of the bridge, the temperature effect should be considered in the design.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.5

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