文档介绍：西南交通大学硕士研究生学位论文 第1页
摘 要
//N钢管混凝土,作为一种新的复合建筑材料,近些年来在土木工程中得到’了广泛的应用。从90年至今的十多年的时间里,我国已经修建钢管混凝土拱桥近百座,还有许多钢管混凝土拱桥正在修建或在计划修建之中。然而,必
须看到,现有的桥梁设计理论滞后于钢管混凝土拱桥的发展,钢管混凝土, 作为~种复合材料,还没有被列入设计规范之中,更应该看到,铁路上还没有一座钢管混凝土拱桥建成勺本文以我国第一座铁路钢管混凝土拱桥一一京沪线九曲河提篮拱桥为背景,在搜集已有的拱桥的设计资料的基础之上,对钢管混凝土拱桥的主要设计参数进行了归纳和总结;对九曲河铁路提篮拱桥的简化计算模型进行了比较并用简化模型进行了内力分析;对拱桥在藏工期
间的稳定性和成桥后的稳定性作了计算,讨论了横撑的位置和数目对拱桥的稳定性的影响:对拱桥的自振特性作了分析。
渤
关键词:钢管混凝土;提篮拱桥;)分析
Abstract
Concrete-filled steel tube,as a new type posite building material,has been widely used in civil engineering in recent the past 1 0 odd years since 1 990,nearly 1 00 concrete-filled tubular arch bridges have been built throughout the country,and there are many concrete-filled tubular arch bridges under construction or it must be realized that there is an uneven development between the present design theory and the practice,that concrete-filled tube,as a new type posite building material,has not been yet adopted in bridge design codes,and also,that there no railway concrete-filled steel tubular arch bridges at this thesis,on the basis of the existing essful the railway concrete-filled steel tubular X—arch bridge, the first of its kind,in the Jiuqu River in the artery running from Beijing to Shanghai,as an example,the author made a summary of main parameters necessary to design of these bridges,made parison between existing calculation three models and performed the internal force calculation,carried OUt the stability analysis of the bridge under and after construction,discussed the effects of the numbers and positions of the lateral braces on the stability,and also, in the last part,gave out part dynamic analysis result.
Key Words:Concrete-filled steel tube;X-arch bridge;Analysis
西南交通大学硕士研究生学位论文 第1页
第1章绪论
拱桥,在桥梁的发展史上曾经占有重要地位,迄今为止,已有三千多年的历史,并因其形态美、造价低、承载潜力大而得到广泛的应用。关于拱桥的起源,众说纷纭,莫衷一是。事实上,在古代,由于交通不便,人们的活动范围有限,交流不多,同一种结构有多种起源、同时在多处独立发展也是完全有可能的。拱桥,和其它的桥梁结构一样,其发展水平和生产力的发展水平息息相关,始终受力学、材料科学和施工技术的制约。