Establishment and verification of the limit state design of the thin wall pipeline considering environmental and earthquake resistance

考虑环境和抗震的薄壁管道极限状态设计建立与验证

• 批准号: 20248026
• 负责人: KAWABATA Toshinori
• 金额: $ 29.45万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20248026/
• 关键词: 土質力学; 応用力学; 地中構造物; パイプライン; 構造力学; 座屈; 模型実験; 応力変形; ひずみ; 土圧; 遠心力模型実験

In designing, deflection and stress of the pipe are calculated through structural analysis based on bending ring stiffness EI/D^3. The pipes with equivalent bending ring stiffness would have the same behavior in design. However, it is easily understandable that the behavior of pipe may be influenced not only by EI/D^3, but also by the relationships between E and I. In this research, pit tests, centrifuge tests under 30G and large shaking table tests with 800gal input wave for buried flexible pipes were conducted to evaluate the effects of pipe thickness on the static and dynamic behavior. As a result, it was found that the larger bending strain and radial stress of the pipe occurred with the thinner wall. This result suggests that the probability of the buckling of the pipe is higher on thinner pipes. It is evident that the pipelines for irrigation should be designed in consideration of this fact.

在设计中，管道的挠度和应力是通过基于弯曲环刚度EI/D^3的结构分析来计算的。具有等效弯曲环刚度的管道在设计中具有相同的行为。然而，很容易理解的是，管道的行为不仅受EI/D^3的影响，而且还受E和I之间的关系的影响。本研究针对埋地柔性管道进行了坑内试验、30 G离心试验和800 gal输入波的大型振动台试验，以评估管道厚度对管道静动力特性的影响。结果表明，管壁越薄，弯曲应变和径向应力越大。这一结果表明，管的屈曲的可能性更高的较薄的管。显然，灌溉管道的设计应考虑到这一事实。

项目成果

Dynamic Behavior of Buried Circular Structures during Earthquake by Discrete Element Method

地震中埋地圆形结构动力行为的离散元法

• 发表时间: 2011
• 期刊: Proceedings of 21st International Offshore and Polar Engineering Conference
• 作者: Kawabata;T.;Iwasaki;Y.;Dodo;H.;Ling;H. and Mohri;Y.
• 通讯作者: Y.

施工過程を考慮した埋設パイプの数値解析

考虑施工工艺的埋地管道数值分析

• 发表时间: 2011
• 期刊: 農業農村工学会誌
• 作者: 毛利栄征;有吉充;河端俊典;田中忠次
• 通讯作者: 田中忠次

Experiments and Numerical Analyses for Spillway on Small Earth Dam Subjected to Simple Shear

简剪小型土坝溢洪道试验与数值分析

• 发表时间: 2011
• 期刊: Proceedings of Geo-Frontiers, ASCE, Dallas, USA
• 作者: Kawabata;T;Mohri;Y
• 通讯作者: Y

不均一な地盤条件における埋設管の力学挙動に関する有限要素法解析

非均匀地面条件下埋地管道力学行为有限元分析

• 发表时间: 2012
• 作者: 百々宏晶;河端俊典;森上浩伸;中島博文;久保京子
• 通讯作者: 久保京子

地盤のせん断変形を受けるたわみ性埋設パイプの変形挙動に関する-考察

柔性埋地管道在地下剪切变形作用下的变形行为思考

• 发表时间: 2011
• 作者: 岩崎善之;河端俊典;甲賀洋輔;園田悠介
• 通讯作者: 園田悠介