山区复杂环境大跨度悬索桥主缆温度场效应及影响研究
本文选题：温度效应 + 大跨径悬索桥 ； 参考：《重庆交通大学》2014年硕士论文
【摘要】：目前,国内的学者对悬索桥温度场及其效应研究都非常重视。桥梁结构温度场及其效应的研究在最近几十年得到了快速发展,但由于主缆中的温度场分布和变化异常的复杂和不确定,使得温度效应对悬索桥施工、悬索桥受力和悬索桥安全性的影响程度很难被精确得确定。 本文主要以鱼嘴长江大桥项目为背景依托工程,对不同季节、不同施工阶段的山区大跨径悬索桥主缆温度场进行了深入的研究。为此,本文进行了如下几方面的工作： 1)对悬索桥主缆温度场影响因素与温度效应对于结构的影响以及国内外研究现状进行了简要概述； 2)对热物性参数实验测试的理论进行了阐释,并对主缆模型热物性参数进行了研究分析； 3)依靠有限元分析理论,以及有限元软件Midas/Civil软件对背景工程中主缆的温度效应进行详细仿真分析计算； 4)通过分析主缆的温度效应,提出了在不同施工阶段温度效应对于结构的影响程度,对山区复杂环境下大跨度悬索桥的架设施工和后期运营维护具有重要的指导意义和参考价值。
[Abstract]:At present, domestic scholars attach great importance to the study of temperature field and its effects of suspension bridge. The study of temperature field and its effect of bridge structure has been developed rapidly in recent decades. However, due to the complexity and uncertainty of temperature field distribution and variation in the main cable, the temperature effect is used in the construction of suspension bridge. The influence of suspension bridge force and suspension bridge safety is difficult to be accurately determined. Based on the Yuzui Yangtze River Bridge project, the temperature field of the main cable of the mountain long span suspension bridge in different seasons and different construction stages is studied in this paper. Therefore, this paper has carried on the following aspects of work: 1) the influence factors of the temperature field and the temperature effect of the main cable of suspension bridge on the structure and the research status at home and abroad are briefly summarized; 2) the theory of experimental test of thermal physical parameters is explained, and the thermal physical parameters of the main cable model are studied and analyzed. 3) based on the finite element analysis theory, The temperature effect of the main cable in the background engineering is analyzed by the finite element software Midas / Civil in detail. 4) by analyzing the temperature effect of the main cable, the influence degree of the temperature effect on the structure in different construction stage is put forward. It has important guiding significance and reference value for erection construction and later operation and maintenance of long-span suspension bridge in complex environment in mountainous area.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.25
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