异型拱桥设计关键技术.pdf

摘要摘要近年来,随着经济的发展、人们生活水平的提高,关于桥梁建筑的造型及其美学效果愈来愈受到人们的重视。新材料、新工艺的发明和推广应用又为桥梁建筑美学要求的实现提供了更大的可能。本着满足上述要求的需要,本文从研究的背景分析开始,描述了异型拱桥的产生和发展,阐述了异型拱桥的优点和美学效果,介绍了几座已经建成的实桥的构造和造型特点,并以盐通高速公路异型拱桥设计方案为背景进行了解析。在此基础上,推导了吊杆斜置异型拱桥合理拱轴线的微分方程和简化方程,并对非均匀有理B样条曲线拱轴线进行了分析;采用ANSYS程序软件对异型拱桥成桥状态的受力性能和各种吊杆斜率、矢跨比、刚度比、拱轴线的异型拱桥的受力状况从内力、稳定性、动力性能等方面作了一定的计算和分析。最后,通过对盐通高速公路异型拱桥的成桥试验,进一步了解桥梁在试验荷载作用下的实际工作状态,并判断桥梁结构的实际承载能力和结构质量。本研究从设计、理论、试验等多个环节,综合分析背景工程异型拱桥,获得了对该类结构特性较为全面的认识,可指导类似桥梁的设计工作。关键词:异型拱桥非均匀有NB样条拱轴线斜吊杆影响参数有限元法稳定性动力性能 Abstract ABSTRACT With the development ofeconomy and people’s and mole attentions arepaid on thebridge shape invention and utilizationof new materialand new technology make itpossible tomeet the requirement of aesthetics inbridge thebackground oftheresearch isanalyzed in thecreationanddevelopment of special-shaped archbridge is theadvantages andaesthetics resuR of aspecial—shape archbridge are givenandsome existedbridges ofthistype a托also introduced but not least,theprojeet ofYantong highway thebasis ofthese deseripti0118 above,the formulas ofarchaxisofthisspecial-shape arch bridge are deduced,and arch axial lineofnon-uniforill rational author almanalysed some characteristics puted the forcesandstabilityand dynamic nature of thisnew type structure with theANSYS softwarebyaltering the suspender slope and ratioofrisetospan,ratio ofrigidityand arch addition,all ofthe researches were carried out onthebackground of aspecial·shape arch bridge,and the relativeloading experimental results pared with the calculated theend,some conclusionsand cognition are obtained by synthesizing all presented forthebridge engineers. Keyworth:special·shaped archbridge,non-uniform rational B-splines archaxial line,skew hanger rod,influencing factor,finite·element method, stabilitydynamic nature. 学位论文版权使用授权书本人完全了解同济大学关