Study on Improvement of Structural Efficiency in Long-Span Cable-Stayed Bridges

大跨度斜拉桥结构效率提高研究

• 批准号: 09555141
• 负责人: YAMAGUCHI Hiroki
• 金额: $ 6.08万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555141/
• 关键词: Cable-Stayed Bridge; Structural Efficiency; Structural Damping; Composite Girder; Creep; Shrinkage; Elasto-Plastic Finite Displacement Analysis; Cable

The main objective of this study is to develop new structural system for long span cable-stayed bridges. The relation between the structural damping characteristics and the structural assembly, the creep and shrinkage of cable-stayed composite girder cable-stayed bridges, and the effects of structural assembly and the dimension of steel girder on the ultimate strength of very long span cable-stayed bridges, are investigated by conducting numerical analyses. The contents of the present study are summarized as follows.1. Improvement of structural efficiency for higher structural damping : The damping analyses of various types of cable-stayed bridges were conducted to investigate their damping characteristics. It is concluded that the structural damping of bridges can be made higher by introducing the internal resonance of cables whose damping is improved appropriately.2. Improvement of structural efficiency in composite girder of cable-stayed bridges : The creep and shrinkage analyses of cable-stayed composite girder bridges with medium span were conducted to investigate their mechanical behaviors and applicable span length. The new type of composite floor slab for composite girder bridges was also studied experimentally as well as analytically.3. Improvement of structural efficiency for very long span cable-stayed bridges : The elasto-plastic finite displacement analyses were conducted for cable-stayed bridges with different assembly of cables and different dimensions of steel girders. The minimum size of girder and the optimal structural assembly were discussed based on the analytically estimated ultimate strength.

本研究的主要目的是开发大跨度斜拉桥的新结构体系。结构阻尼特性与结构拼装的关系、斜拉组合梁斜拉桥的蠕变、收缩以及结构拼装和钢梁尺寸对特大跨斜拉桥极限强度的影响桥梁，通过进行数值分析进行研究。本研究的主要内容如下： 1．提高结构效率以获得更高的结构阻尼：对各种类型的斜拉桥进行阻尼分析，以研究其阻尼特性。得出结论：通过适当提高阻尼，引入拉索内共振，可以提高桥梁的结构阻尼。 2．提高斜拉桥组合梁的结构效率：对中等跨径斜拉组合梁桥进行徐变和收缩分析，以研究其力学性能和适用跨度。对新型组合梁桥组合楼板进行了试验和分析研究。 3．提高特大跨度斜拉桥的结构效率：对不同缆索组合和不同钢梁尺寸的斜拉桥进行弹塑性有限位移分析。根据分析估算的极限强度，讨论了梁的最小尺寸和最佳结构装配。

项目成果

山口宏樹・Md.アラウディン: "部分構造連成を利用したケーブルシステムの振動制御" 第6回運動と振動の制御vシンポジウム講演論文集, 日本機械学会. 141-146 (1999)

Hiroki Yamaguchi 和 Md. Alauddin：“利用下部结构相互作用进行电缆系统的振动控制”第六届运动与振动控制研讨会论文集，日本机械工程师学会 141-146 (1999)。

M.Nagai,X.Xie,H.Yamaguchi et al.: "Effects of inelastic behavior of cables on ultimate strength of long-span stelel cable-stayed bridges" Proc.5th Pacific Structural Steel Conf.,Seoul,Korea,1998.10. 565-570 (1998)

M.Nagai，X.Xie，H.Yamaguchi等：“索的非弹性行为对大跨钢索斜拉桥极限强度的影响”Proc.5th Pacific Structural Steel Conf.，首尔，韩国，1998.10。

Okui Y.et al.Miyata, T.& Yamada, H.: "Experimental study on applicability of sandwiched composite slab to composite girder bridges" Proc.of the 53^<rd> Annual Meeting of JSCE,cs. 332-333 (1998)

Okui Y.等人Miyata, T.

山ロ宏樹: "吊形式橋梁のモード構造減衰" 21世紀のダンピング技術シンポジウム講演論文集,日本機会学会. 225-228 (1997)

Hiroki Yamaro：“悬索桥的模态结构阻尼”21 世纪阻尼技术研讨会论文集，日本机械工程师学会 225-228（1997 年）。

Izawa,M., Nagai,M., 0kui,Y. and Yamaguchi,H.: "Creep and shrinkage analyses of cable-stayed composite 2‐1 girder bridges with low towers" Proc. 4th JapanーKorea Joint Seminar on Steel Bridges. 595-600 (1997)

Izawa, M., Nagai, M., 0kui, Y. 和 Yamaguchi, H.：“低塔斜拉组合 2-1 梁桥的蠕变和收缩分析”，第四届日韩钢桥联合研讨会。 .595-600 (1997)