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THE SYNTHETIC RESEARCH ON CONSTRUCTION OF LARGE-SCALE WOODEN BRIDGE STRUCTURE

大型木桥结构施工综合研究

基本信息

批准号：
10555153
负责人：
MITSUI Yasushi
金额：
$ 4.1万
依托单位：
SHINSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555153/
关键词：
WOODEN BRIDGE GLUED-LAMINATED TIMBER 橋梁応力集中 FEM

项目摘要

The main purpose of this research is to set up a database that collects an enormous amount of information on timber bridges. The first-hand information are obtained from the systematic investigation into the actual circumstance of overseas timber bridge, by study of material properties of timbers produced in Japan and foreign countries. During establishing the database, the methods adopted for diagnosis and rehabilitation of timber bridge in various nations are compared to each other and analyzed. Finally, an indicator for the design and maintenance management of large scale timber bridges will be pres ented.During the research, great attention was paid to the material properties characteristic of timber. The properties effect the design of a timber bridge very much. For example, if the main structure of a timber bridge is made from wood possessing smaller specific gravity, the substructure could be properly designed in a rather smaller scale, too, since the deadweight of the bridge su … More perstructure is lighter. Such structure is very effective to proof against earthquake. In addition to, in case unfortunately, the bridge suffered from an earthquake, it could be repaired or removed in quite short time. From this viewpoint, such timber structure is comparatively more favorable than steel or concrete structure. Besides, taking into consideration of the specific gravity of timber, since its compressive and tensile strength are all five times stronger, its specific heat is about three times greater than steel, a bridge with timber main structure is also effective against fire. From the experience of Hanshin-Danji Great Earthquake and because earthquake frequently happens in our country, it is presupposed that timber bridge is promisingstructure in the future.Now, some interesting study programs and active research actions are still underway. The information related to internal and external timber bridges, material properties of various woods are exchanged. The techniques adopted in each timber structure own are studied.Diverse technologies, glued-laminated timber that might be applied to design and to construct large scale timber bridge in the future are investigated. The factors that are necessary and indispensable to construction of a large scale timber bridge are extracted. A numerically analytical method to study the specific material properties of timber is being developed. Less

本研究的主要目的是建立一个收集大量木桥信息的数据库。通过对日本及国外木结构桥梁的材料性能的研究，对国外木结构桥梁的实际情况进行了系统的调查，获得了第一手资料。在建立数据库的过程中，对各国木桥的诊断与修复方法进行了比较和分析。最后，提出了一个大型木桥设计和养护管理的指标。这些特性对木桥的设计影响很大。例如，如果木桥的主体结构是由比重较小的木材制成的，那么下部结构也可以按较小的比例进行适当设计，因为桥梁的自重超过了桥梁的自重。 ...更多信息结构更轻。这种结构抗震效果很好。此外，如果不幸的是，这座桥遭受了地震，它可以在很短的时间内修复或拆除。从这个角度来看，这种木结构比钢结构或混凝土结构相对更有利。此外，考虑到木材的比重，由于其抗压强度和抗拉强度都是钢的五倍，比热约为钢的三倍，以木材为主体结构的桥梁也是有效的防火。从坂神-丹寺大地震的经验和我国地震频发的特点来看，木桥是一种有前途的结构形式，目前仍在进行一些有意义的研究项目和积极的研究活动。与内部和外部木桥，各种木材的材料属性有关的信息进行了交换。研究了各种木结构体系所采用的技术，探讨了今后可能应用于大型木结构桥梁设计和施工的各种技术和胶合木结构体系。提取了大型木桥施工所必需的、不可缺少的因素。一种研究木材特殊材料特性的数值分析方法正在开发中。少