A STUDY FOR WAVE RESPONSE OF HORIZONTAL-ARCH BRIDGES WITH SEMI-SUBMERSIBLE FLOATING FOUNDATIONS

半潜式浮动基础水平拱桥波响应研究

• 批准号: 07455184
• 负责人: WATANABE Eiichi
• 金额: $ 4.93万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 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-07455184/
• 关键词: floating bridge; hydro-elastic analysis; linear diffraction theory; wave response; potential theory; floating foundation; 線形回折波理論; 流力一弾性解析

This research has studied "Horizontal-arch bridges with semi-submersible floating foundations, " which the floating pontoon foundations are replaced by the semi-submersible floating foundations. In this study, the attention has been paid on the wave response characteristics, and the effect of the foundation shapes are examined to improve the wave-resistant design.The diffraction and radiation wave forces have been calculated by using axi-symmetric Finite Element Program for each floating foundation. The program enploys infinite elements for satisfying radiation condition at infinity. The bridge structure is modeled as a elastic beam, and the whole structural system has been analyzed by NASTRAN,general purpose F.E.M.program. The fluid-elastic structure system has successfully been analyzed by the procedure.The effect of the floating foundations have been examined on the condition that the immersed displacement of the foundation has the constant value. Numerical examples have shown that the semi-submersible type floating bridge has an improved characteristics. Moreover, the floating bridge that the Osaka municipal office is now planning at Maishima-Yumeshima channel is studied, and the transient response analysis in the time-domain considering nonlinearity of the fender and the elastic deformation of the bridge system has also been made.

本研究以半潜式浮式基础取代浮箱基础的“半潜式浮式基础横拱桥”为研究对象。本研究针对浮式基础的波浪响应特性，探讨基础形状对浮式基础抗波设计的影响，并利用轴对称有限元程序计算了各浮式基础的绕射力和辐射力。程序采用无限单元满足无穷远辐射条件。桥梁结构采用弹性梁模型，并利用NASTRAN通用有限元程序对整个结构体系进行了分析。应用该程序成功地分析了流体弹性结构体系，并在基础下沉位移为常数的条件下，考察了浮体基础的影响。数值算例表明，半潜式浮桥具有较好的特性。此外，大坂市政府办公室正在计划在舞岛Yumeshima通道浮桥研究，并在时域瞬态响应分析，考虑非线性的挡泥板和桥梁系统的弹性变形。

项目成果

渡邊英一: "独立カラム型浮体基礎橋梁の波浪応答特性に関する研究" 海洋開発論文集. 12. 157-160 (1996)

渡边英一：《独立柱式浮动基础桥梁的波浪响应特性研究》海洋研究杂志12. 157-160（1996）。

渡邊 英一: "独立カラム型浮体橋梁の波浪応答特性に関する研究" 海洋開発論文集. 12. 157-160 (1996)

渡边英一：《独立柱式浮桥的波浪响应特性研究》海洋研究杂志12. 157-160（1996）。

渡邊 英一: "フェンダー特性ならびに弾性変形を考慮した実規模浮体式橋梁の波浪応答特性" 海洋開発論文集. 13. (1997)

Eiichi Watanabe：“考虑护舷特性和弹性变形的全尺寸浮桥的波浪响应特性”海洋开发杂志13。（1997）

Eiichi Watanabe: "Wave Response of Bridges with Independent Column-type Floating Foundations" Proc.of Civil Engineering in the Ocean. Vol.12. 157-160 (1996)

Eiichi Watanabe：“独立柱式浮动基础桥梁的波响应”Proc.of Civil Engineering in the Ocean。

Eiichi Watanabe: "Shape Effect of Floating Foundations to Wave Response of a Floating Bdridge" Proc.of Civil Engineering in the Ocean. Vol.11. 333-338 (1995)

Eiichi Watanabe：“浮式基础对浮桥波浪响应的形状效应”Proc.of Civil Engineering in the Ocean。