Development of new system and design method for economical long-span cable-supported bridges

经济型大跨度斜拉桥新系统及设计方法开发

• 批准号: 07555439
• 负责人: NAGAI Masatsugu
• 金额: $ 1.66万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555439/
• 关键词: suspension bridges; cable-stayd bridges; spatial cable systems; long-span bridges; elasto-plastic finite displacement analysis; buckling; flutter; wind; 吊形式橋梁; 斜張吊橋; 耐風安定性; 耐荷力; 設計法

In this study, a new bridge system and design method for economical long-span cable-supported bridges is developed. Elasto-plastic large displacement analysis, elastic large displacement analysis which takes displacement-dependent wind load, flutter analysis which takes the cable local vibration into account for long-span cable-supported bridges with an arbitrary configuration are developed. Using 1400-meter cable-stayd bridge models with different size of cross sections, instability analyzes are carried out, then the minimum cross-sectional dimension which ensures safety against above instabilities is presented. With respect to suspension bridges, using a 2500-meter bridge model, the effect of the cable system, such as conventional system, spatial cable system, the Mono cable system and also transversely arranged members, such as cross hanger on flutter onset wind velocity is investigated. It is found the former effect is small and the latter one is prominent. From this study, the conventional system with transversely stiffening system such as cross hanger and rigid hanger is recommended for attaining high aerodynamic stability. Further, damping mechanism of long-span cable-supported bridge is made clear, also, vibration control for increasing flutter onset wind velocity is investigated.

本文提出了一种新的经济型大跨度斜拉桥体系和设计方法。对大跨度斜拉桥进行了弹塑性大位移分析、考虑位移相关风荷载的弹性大位移分析和考虑拉索局部振动的颤振分析。采用1400 m斜拉桥模型，对不同截面尺寸的斜拉桥进行了失稳分析，提出了保证斜拉桥不发生上述失稳的最小截面尺寸。针对悬索桥，采用2500m的桥梁模型，研究了常规索系、空间索系、Mono索系以及横索等横向布置构件对颤振起振风速的影响。结果表明，前一种影响较小，后一种影响较大。根据研究结果，建议采用横向加强的常规系统，如十字吊架和刚性吊架，以获得高的气动稳定性。在此基础上，分析了大跨度悬索桥的减振机理，并对提高颤振起始风速的振动控制进行了研究。

项目成果

H.Yamaguchi, H.takano, M.Ogasawara, T.Shimosato, M.Kato and J.Okada: "Identification of dynamic characteristics by field vaibration test in Tsurumi Tusbasa bridge" Jour.of Structural Eng./Earthquake Eng.No.543/I-36, JSCE. 247-258 (1996)

H.Yamaguchi、H.takano、M.Ogasawara、T.Shimosato、M.Kato 和 J.Okada：“鹤见 Tusbasa 桥现场振动试验的动态特性识别”Jour.of Structural Eng./Earthquake Eng.No.。

K.Nogai,M.Nagai,K.Yamamoto,Y.Fujino: "Load-carrying capacity of cable-stayed girders based on multiple ultimate strengeh curves of columms and its stability check" Proc.of 2nd Int.Conf.on Coupled Instabilities in Metal. Vol.2. 421-428 (1996)

K.Nogai，M.Nagai，K.Yamamoto，Y.Fujino：“基于柱的多重极限强度曲线的斜拉梁的承载能力及其稳定性校核”第二届耦合不稳定性国际会议论文集

K.Nogami, M.Nagai, K.Yamamoto and Y.Fujino: "Load-carrying capacity of cable-stayd girders based on multiple ultmate strength curves and its stability check" Proc.of the 2nd Int.Conf.on Coupled Instabilities in Metal Structures, Liege, Belgium. 421-428 (1

K.Nogami、M.Nagai、K.Yamamoto 和 Y.Fujino：“基于多个最终强度曲线的斜拉梁的承载能力及其稳定性检查”Proc.of the 2nd Int.Conf.on Coupled Instilitys in

H.Yamaguchi and M.Takahashi: "Damping analysis of cable-stayd bridges" Proc.of Int.Conf.on Urban Engineering in Asian Cities in the 21st Century, Bangkok, Thailand. 343-348 (1996)

H.Yamaguchi 和 M.Takahashi：“斜拉桥的阻尼分析”Proc.of Int.Conf.on Urban Engineering in the Asian Cities in the 21st Century，泰国曼谷。

T.Susumpow and Y.Fujino: "Active control of multimodal cable vibration by axial support motion" Jour.of Engineering Mechanics, ASCE. Vol.121. No.9. 964-972 (1995)

T.Susumpow 和 Y.Fujino：“通过轴向支撑运动主动控制多模态缆索振动”Jour.of Engineering Mechanics，ASCE。