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.

这项研究的主要目的是开发长期覆盖有线桥的新结构系统。结构阻尼特性与结构组件之间的关系，电缆固定的复合梁电缆固定桥的蠕变和收缩，结构组装的影响以及钢梁的尺寸对长期跨度缆线固定桥梁的最终强度的尺寸，可以通过进行数值分析来研究。本研究的内容总结如下1。提高了更高结构阻尼的结构效率：进行了各种类型的电缆固定桥的阻尼分析，以研究其阻尼特性。结论是，通过引入可适当改善阻尼的电缆的内部共振，可以使桥的结构阻尼更高。2。通过中等跨度的电缆固定桥梁的复合围栏的结构效率提高：电缆固定的复合梁桥的蠕变和收缩分析，以研究其机械行为和适用的跨度。还通过实验和分析研究了用于复合梁桥的新型复合板板。3。长期跨度有线桥梁的结构效率提高：对具有不同电缆组装和不同钢梁尺寸的电缆固定桥进行了弹性塑料有限位移分析。根据分析估计的最终强度，讨论了梁的最小尺寸和最佳结构组装。

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。

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)

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.