现代木结构桥梁在我国的应用可行性及前景研究

发布时间：2018-03-27 09:36

本文选题：木材　切入点：传统木结构桥梁　出处：《长安大学》2014年硕士论文

【摘要】：在国内外，木结构桥梁均为最早出现的桥型之一。木材因其在结构与美学方面的优越性能，以及在生态效益方面的特殊价值，从古至今一直是桥梁工程师钟爱的结构材料。集科学性、创造性与艺术性于一体的木结构桥梁是中华文化的一大亮点。虽然传统木结构起源于中国，现代木结构则集中于北美、欧洲、日本等。在我国，人们对于木结构是熟悉又陌生的。因此，本文在搜集整理国内外相关资料的基础上，以木结构桥梁为研究对象，研究其在我国的应用可行性及前景。具体研究内容如下：（1）基于木结构桥梁结构形式，从历史的角度探讨中国传统木结构桥梁的发展演变及结构特点。结果表明：传统木结构桥梁由于其材料自身局限性，跨越能力及耐久性能有限，虽然其历史悠久，但由于缺乏科学理论的指导，，又无新材料和新科技的支撑，所以很难跨入近现代桥梁的时代，并逐渐被钢与混凝土桥梁所替换。（2）针对木结构桥梁认识误区，探讨分析国外木结构桥梁发展及特点，为我国发展现代木结构桥梁提供借鉴思考。结果表明：不同与传统木结构桥梁，现代木结构桥梁由于现代木产品、连接、防火、防腐等技术的发展，其耐久性、跨越能力均有很大程度的提高，在中小跨径桥梁中是理想的桥梁造型，我们有必要重新认识并发展现代木结构桥梁。（3）从我国国家政策支持、森林资源现状、林木业贸易状况、木结构企业、新型木结构产品、相关标准等方面集中探讨木结构桥梁在我国应用的可行性及应用领域、前景。结果表明：木结构桥梁在我国具备应用可行性，在我国中小跨径桥梁、人行景观桥梁、抗险救灾桥梁及西部严寒地区具有广阔的应用前景。（4）以板桥及板拱桥为工程背景，分析CLT在中小跨径桥梁中的适用范围。结果表明：板桥中九层的CLT板单孔跨径可至13m，板拱桥中单孔跨径可至20m，并有较大富余度。实际工程中推荐优先采用以受拉压力为主的拱桥与桁架桥，或采用钢-木组合结构形式。
[Abstract]:At home and abroad, wooden bridges are one of the earliest wood bridge. Because of its excellent performance in structure and aesthetics, and the special value in ecological benefits, since ancient times has been a structural material bridge engineers love. Scientific, creative and artistic wood structure is a major bridge in one highlights of Chinese culture. In spite of the Chinese origin of the traditional wooden structure, modern wood structure is concentrated in North America, Europe, Japan and so on. In China, people are familiar and unfamiliar to the wooden structure. Therefore, based on the collection and collation of the relevant information at home and abroad, to the wooden structure of the bridge as the research object. The feasibility of application in China and prospects. The main research contents are as follows:
(1) the form of wooden structure based on the structure, evolution and structural characteristics of China traditional wooden bridge from the angle of history. The results show that the traditional wooden bridge materials because of its own limitations, spanning ability and durability is limited, although it has a long history, but because of the lack of scientific theories, and no new the new material and technology support, so it is difficult to enter the modern bridge times, and gradually being replaced by steel and concrete bridges.
(2) for wood bridge misunderstandings, analysis on the development and characteristics of wood bridges abroad, to provide reference for China's development on the modern wooden structure bridge. The results show that different from the traditional wooden bridge, the modern wooden structure bridge because of modern wood products, with fire prevention, anti-corrosion technology development, its durability and crossing ability are greatly improved, the small and medium span bridge is the bridge of other ideal, it is necessary for us to understand and develop the modern wooden structure bridge.
(3) support from China's national policy, the status of forest resources, trade in timber industry, wood enterprises, new wood products, related standards and other aspects of the wooden structure bridge in the feasibility and application fields, China's application prospect. The results showed that: in our country the wooden structure bridge with the application feasibility in SMEs long span bridges in China, pedestrian bridge, bridge and anti disaster insurance in western cold area has broad application prospects.
(4) in Banqiao and plate arch bridge as the engineering background, the scope of CLT in middle small span bridges. The results showed that CLT in nine layer single span bridge to 13m, the single hole span to 20m plate arch bridge, and has a rich redundancy. In practical engineering is recommended using the arch bridge with the truss bridge tension of the pressure, or by using a structure of steel wood composite.

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.31

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