600m级钢筋混凝土拱桥主拱构造与拱上立柱布置形式研究

发布时间：2018-06-03 13:39

本文选题：600m级钢筋混凝土拱桥 + 矢跨比　；参考：《重庆交通大学》2015年硕士论文

【摘要】：钢筋混凝土拱桥刚度大、承载能力高、抗震性能好、后期维护费用低,与周围环境协调,历来受到工程师的重视和推崇。但受到施工技术的限制,一直制约着混凝土拱桥朝更大跨度的发展。上世纪末,国外提出600m级的超大跨径混凝土拱桥设计方案,随后日本、中国也开展了600m-1000m级超大跨径混凝土拱桥的试设计。对于超大跨径混凝土拱桥,主拱圈构造与拱上立柱布置直接关系到结构构造、静动力特性和施工方法。为此,本文开展以下研究工作:1)收集、整理国内外超大跨径混凝土拱桥关于矢跨比、拱轴系数、主拱截面形式与尺寸、拱上建筑构造与布置形式等参考数据,为600m级钢筋混凝土拱桥主拱圈及拱上建筑设计参数的研究提供借鉴和对比分析。2)利用有限元软件ANSYS,对600m级钢筋混凝土拱桥的主拱截面、矢跨比、拱轴系数进行研究,分析其对主拱受力、稳定、位移的影响规律,在此基础上获取设计参数的合理取值范围。3)选择T构+刚构+连续梁的拱上立柱形式,研究600m级钢筋混凝土拱桥的腹孔跨径、立柱与主梁连接方式,分析不同腹孔跨径、不同立柱与主梁连接方式对主拱、立柱的影响规律,并获取设计参数的合理取值范围。4)针对600m级钢筋混凝土拱桥的受力规律,利用APDL语言编写了拱轴线优化命令流,实现偏心距最大值最小、偏心距最大值在拱脚截面的优化拱轴系数方法。
[Abstract]:Reinforced concrete arch bridge has the advantages of large stiffness, high bearing capacity, good seismic performance, low maintenance cost in the later period, and coordination with the surrounding environment, which has always been valued and respected by engineers. However, limited by construction technology, concrete arch bridge has been restricting the development of a larger span. At the end of last century, foreign countries put forward the design scheme of 600m super-span concrete arch bridge, and then Japan and China also carried out the trial design of 600m-1000m class super-span concrete arch bridge. For super-span concrete arch bridge, the main arch ring structure and the arrangement of the column on the arch are directly related to the structure, static and dynamic characteristics and construction method. Therefore, the following research work is carried out in this paper: (1) to collect and organize the reference data of oversized span concrete arch bridges at home and abroad, such as the rise-span ratio, arch axis coefficient, the form and size of main arch section, the construction and layout of arch structures, etc. To provide reference and comparative analysis for the study of the design parameters of the main arch ring of 600m reinforced concrete arch bridge and its upper arch. 2) using the finite element software ANSYS, the main arch section, rise-span ratio and arch axis coefficient of the 600m reinforced concrete arch bridge are studied, and the main arch section, the rise-span ratio and the arch axis coefficient of the 600m reinforced concrete arch bridge are studied. Based on the analysis of its influence on the force, stability and displacement of the main arch, the reasonable value range of design parameters. 3) selecting the arch column form of the T-frame rigid frame continuous beam, and studying the abdominal span of 600m reinforced concrete arch bridge. The connection mode between column and main beam, the influence law of different span of abdomen hole, different connecting mode of column and main beam on main arch and column, and the reasonable value range of design parameter. 4) aiming at the force law of 600m grade reinforced concrete arch bridge, the connection mode of column and main beam is analyzed, and the influence law of different connecting mode of column and main beam on main arch bridge and column is obtained. The APDL language is used to compile the optimal command flow of the arch axis, which realizes the maximum eccentricity and the maximum eccentricity in the arch foot section.
【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】：U448.22

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