悬索桥CFRP缆索系统设计关键技术研究

发布时间：2018-07-02 14:28

本文选题：CFRP缆索 + 悬索桥　；参考：《重庆交通大学》2014年硕士论文

【摘要】：随着交通运输的迅猛发展及工程科学技术的进步，桥梁跨径也在不断的加大，特别是对于在跨径上具有明显优势的悬索桥提出了更高的要求。从上世纪末的日本1991m明石海峡大桥的成功修建，到3300m的墨西拿海峡悬索桥的建造，再到5000m超大跨径的直布罗陀海峡悬索桥方案的提出，可以看出悬索桥的发展进程也越来越迅速了。然而现役悬索桥钢缆索具有的自重大、耐久性差等特点，是限制悬索桥发展的主要因素，这就需要研究新的材料来解决这些问题。新兴的CFRP(碳纤维增强复合材料)因具有质量轻、强度高以及抗腐蚀性好等诸多优于钢缆索材料的特点，有望从根本上解决钢缆索悬索桥遇到的一些问题，从而替代钢缆索。到目前为止，在全世界范围内已有修建CFRP缆索人行悬索桥的成功案例，但相关的研究文献还较少。因此本文探索性地对CFRP缆索悬索桥及其关键构件进行分析研究，，研究的主要工作包括： ①以云南某钢缆索悬索桥为参考，根据CFRP材料的特性，拟定CFRP缆索悬索桥主要的设计参数，并将CFRP缆索悬索桥与钢缆悬索桥进行对比分析，结果表明，CFRP缆索悬索桥上部悬吊结构的总重及总恒载均比钢缆索悬索桥小，且受此影响的重力刚度也比钢缆索悬索桥小。 ②利用Midas Civil有限元软件对两类悬索桥的主缆、吊索、加劲梁和索塔进行计算，并对比各构件在恒载、活载及温度荷载作用下的受力、变形情况。此外，对两类悬索桥的动力特性进行了分析。 ③结合CFRP缆索悬索桥的Midas Civil分析结果，运用SolidWorks软件对缆索系统中索鞍、索夹和缆索进行建模计算，从缆索的受力情况出发，分析总结出了各个构件的设计制作要点。
[Abstract]:With the rapid development of transportation and the progress of engineering science and technology, the span of bridge is also increasing, especially for the suspension bridge which has obvious advantages in span. From the successful construction of the 1991m Akashi Strait Bridge in Japan at the end of the last century, to the construction of the 3300m Messina Strait suspension Bridge, and to the proposal of the 5000m super-span suspension bridge for the Strait of Gibraltar, It can be seen that the development of the suspension bridge is also getting faster and faster. However, the steel cables of active suspension bridges have the characteristics of self-importance and poor durability, which are the main factors restricting the development of suspension bridges. Therefore, it is necessary to study new materials to solve these problems. The new CFRP (carbon fiber reinforced composite) has many advantages over steel cable materials such as light weight, high strength and good corrosion resistance, so it is expected to fundamentally solve some problems encountered by steel cable suspension bridge and replace steel cable. Up to now, there have been many successful cases of CFRP cable suspension bridges all over the world, but the relevant literatures are still few. Therefore, this paper makes an exploratory analysis of CFRP cable suspension bridge and its key components. The main work of the study includes: 1 taking a steel cable suspension bridge in Yunnan as a reference, according to the characteristics of CFRP material, The main design parameters of CFRP cable suspension bridge are drawn up, and the comparison between CFRP cable suspension bridge and steel cable suspension bridge is carried out. The results show that the total weight and dead load of the upper suspension structure of CFRP cable suspension bridge are smaller than that of steel cable suspension bridge. The gravity stiffness affected by this is also smaller than that of steel cable suspension bridge. 2 the main cable, sling, stiffened beam and cable tower of two kinds of suspension bridges are calculated by Midas Civil finite element software, and the dead load of each member is compared. Stress and deformation under live load and temperature load. In addition, the dynamic characteristics of two kinds of suspension bridges are analyzed. 3 combined with the results of Midas Civil analysis of CFRP cable suspension bridges, the cable saddle, cable clamp and cable in cable system are modeled and calculated by SolidWorks software. Based on the stress of cable, the main points of design and manufacture of each component are analyzed and summarized.
【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

【参考文献】