Nonlinear Dynamic Response Characteristics of Submerged Floating Tunnels

水下浮动隧道的非线性动力响应特性

• 批准号: 06650506
• 负责人: MIKAMI Takashi
• 金额: $ 1.22万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650506/
• 关键词: Submerged Floating Tunnel; Tension Leg; Nonliner Dynamic Responce; 自由振動問題

Nonlinear dynamic response characteristics of submerged floating tunnels (SFT) are investigated for different arrangements of tension leg. The main results obtained in this study are summarized as follows :(1)The tension acting on the leg is qualitatively classified into three regions :1)Region-A : A leg is stable .2)Region-B : A leg is slacking .3)Fegion-C : Snap loading takes place .(2)In the case of tension leg arrangements (Type A) with a constant inclination (alpha=90ﾟ) with respect to the horizontal plane, the non-linearity of the lateral restoring force bcomes a problem. The features of this type are :1)Although lateral displacement is great, slack is least likely to occur with this arrangement.2)Lateral displacement increased with the angle of wave incidence.(3)In the case of tension leg arrangements (Type B) with a constant inclination (alpha*0ﾟ) the stiffness in the horizontal direction is superior to others in terms of moderating the response of SFT.The features of this typeare :1)Lateral displacement is much less thanin type A,but slackis more likely to occur.2)No significant variations in lateral displacement are found with different joint rigidities between tunnel elements.(4)The magnitude of the fluctuating tension is strongly influenced by the wave height.(5)The higher initial tension and smaller wave hight are indispensable for avoidance of slacking phenomena.

研究了水下悬浮隧道在不同张力腿布置方式下的非线性动力响应特性。主要研究结果如下：（1）作用在腿上的拉力定性地分为三个区域：1）A区：腿稳定; 2）B区：腿松弛; 3）Fegion-C区：发生卡扣加载。(2)In在相对于水平面具有恒定倾角（α =90 °）的张力腿装置（A型）的情况下，横向恢复力的非线性会产生问题。这种类型的特点是：1）虽然侧向位移很大，但这种布置最不可能出现松弛。2）侧向位移随着波浪入射角的增加而增加。(3)In对于具有恒定倾角（α *0 θ）的张力腿布置（B型），其水平方向的刚度对SFT响应的调节作用上级其它布置形式，其特点是：1）侧向位移远小于A型，但更容易出现松弛; 2）隧道单元之间的连接刚度不同，侧向位移变化不大。（4）波动张力的大小受波高的影响很大。（5）为避免出现松弛现象，必须有较高的初张力和较小的波高。

项目成果

田尻太郎: "FEMとBEMを用いた水中構造物の三次元自由振動解析" 構造工学における数値解析法シンポジウム論文集. 18. 45-50 (1994)

Taro Tajiri：“使用 FEM 和 BEM 进行水下结构的三维自由振动分析”结构工程数值分析方法研讨会论文集 18. 45-50 (1994)。

Shunji KANIE: "Analytical Study on Dynamic Response of Submerged Floating Tunnels due to Waves." Proc.of the Third Symposium on Strait Crossings. 659-666 (1994)

Shunji KANIE：“波浪引起的水下浮动隧道动态响应的分析研究”。

Shunji KANIE: "Dynamic Response of Submerged Floating Tunnels to Waves and Earthquakes" Proc.of the Fifth East Asia-Pacific Conference on Structural Engineering and Construction. 2. 1321-1326 (1995)

Shunji KANIE：“水下浮动隧道对波浪和地震的动态响应”第五届东亚太平洋结构工程与施工会议论文集。

田尻太郎: "水中構造物の自由振動特性" 土木学会北海道支部論文報告集. 51. 280-285 (1995)

田尻太郎：《水下结构的自由振动特性》日本土木工程学会北海道分会论文集 51. 280-285 (1995)。

Shunji KANIE: "Dynamic Response of Submerged Floating Tunnels to Waves and Earthquakes" Proc. of the Fifth East Asia-Pacific Conference on Structural Enginneing and Construction. 2. 1321-1326 (1995)

Shunji KANIE：“水下浮动隧道对波浪和地震的动态响应”Proc。