Field Measurement and Numerical Analysis for Buried Large Diameter Steel Pipes

2008 ◽  
Author(s):  
Toshinori Kawabata ◽  
Yoshiyuki Mohri ◽  
Tetsuya Oda ◽  
Daisuke Shoda ◽  
Mitsuru Ariyoshi ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Field Measurement ◽  
Large Diameter ◽  
Steel Pipes

The numerical analysis of a large diameter spherical valve

2018 ◽  
Vol 18 (5) ◽  
pp. 300
Author(s):  
Shidong Li ◽  
Zhiyong Wu
Keyword(s):  
Numerical Analysis ◽  
Large Diameter

Design Equations for Large Diameter Buried Steel Pipes Inspired by the Modified Iowa Formula

2021 ◽  
Vol 21 (9) ◽  
pp. 04021160
Author(s):  
Mojtaba Salehi Dezfooli ◽  
Himan Hojat Jalali ◽  
Mohammad Razavi ◽  
Ali Abolmaali
Keyword(s):  
Large Diameter ◽  
Steel Pipes

Dynamic Responses of Buried Pipelines Under Impact Loading Caused by Landslide

2012 ◽  
Vol 204-208 ◽  
pp. 3476-3479 ◽  
Author(s):  
Xiu Xing Zhu ◽  
Shi Feng Xue ◽  
Xing Hua Tong ◽  
Chuan Qi Liu
Keyword(s):  
Impact Loading ◽  
Impact Force ◽  
Large Diameter ◽  
Influence Factors ◽  
Dynamic Responses ◽  
Thin Wall ◽  
Buried Pipelines ◽  
Steel Pipes ◽  
Mountainous Regions ◽  
The Impact

Cases of pipeline damage caused by landslide are common in coastal or mountainous regions, where the design of buried pipelines should be improved in order to reduce the risk of damage or failure. Dynamic responses of large diameter thin wall steel pipes under impact loading were analyzed using a nonlinear contact model of pipe-soil coupling in this paper. Several influence factors were studied, such as the impact velocity of rockfall, buried depth of pipeline, ratio of diameter to thickness and style of soil. The results show that an ellipsoid induces much more impact force than a sphere which has the same volume, and the larger one in volume have greater impact force for two spheres. Dangerous compressive areas of pipeline occupy 1/6 of the whole area, so the pipelines subject to landslide occur local failure. Based on results, some useful suggestions for the design of pipelines in landslide region are given

Analysis and Control of Layer Deformation Induced by the Densely Arranged Large Diameter Underground Steel Tubes Jacking with NTR Method

2015 ◽  
Vol 744-746 ◽  
pp. 1010-1014
Author(s):  
Chun Fu Jin ◽  
Peng Niu ◽  
Yong Sheng Zhao ◽  
Xuan Wang
Keyword(s):  
Surface Deformation ◽  
Large Diameter ◽  
Influence Factors ◽  
Surface Subsidence ◽  
The Finite Element Method ◽  
Steel Tubes ◽  
Steel Pipes ◽  
Pipe Jacking ◽  
And Control ◽  
Layer Deformation

Combined with the finite element method (FEM) and the field data of Shenyang Metro NTR engineering for pipe jacking process, the variation of surface deformation and influence factors of NTR construction are systematically analyzed. The result is shown that the curves of the lateral surface subsidence produced by pipe jacking process are accord with the normal distribution curves put forward by Peck .When the top steel pipes are jacked , the surface subsidence develops rapidly and the rate of deformation is larger. In addition , grouting behind the wall and the sequence of the pipe jacking all have a greater impact on the deformation of the layer.

Fatigue Performance of Orthotropic Steel Decks with FRP Angles: Field Measurement and Numerical Analysis

2019 ◽  
Vol 33 (4) ◽  
pp. 04019042 ◽  
Author(s):  
Tong Guo ◽  
Jie Liu ◽  
Yang Deng ◽  
Zhaolei Zhang
Keyword(s):  
Numerical Analysis ◽  
Field Measurement ◽  
Fatigue Performance ◽  
Orthotropic Steel Decks

A vision-based algorithm for seam detection in a PAW process for large-diameter stainless steel pipes

2004 ◽  
Vol 26 (9-10) ◽  
pp. 1006-1011 ◽  
Author(s):  
Jingguo Ge ◽  
Zhengqiang Zhu ◽  
Defu He ◽  
Ligong Chen
Keyword(s):  
Stainless Steel ◽  
Large Diameter ◽  
Steel Pipes

Numerical Analysis of a Single Large-diameter Cofferdam under Offshore Loadings

2019 ◽  
pp. 107-112
Author(s):  
Jeongsoo Kim ◽  
Yeon-Ju Jeong ◽  
Min-Su Park
Keyword(s):  
Numerical Analysis ◽  
Large Diameter

Numerical Analysis of Flow-Induced Vibration of Large Diameter Pipe With Short Elbow

2017 ◽  
Author(s):  
Shigeru Takaya ◽  
Tatsuya Fujisaki ◽  
Masaaki Tanaka
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Fast Reactor ◽  
Pressure Fluctuation ◽  
Cooling System ◽  
Large Diameter ◽  
Recirculation Region ◽  
Flow Induced Vibration ◽  
Scaled Model ◽  
Energy Agency

Japan Atomic Energy Agency is now conducting design study and R&D of an advanced loop-type sodium cooled fast reactor. The cooling system is planned to be simplified by employing a two-loop configuration and shortened piping with less elbows than a prototype fast reactor in Japan, Monju, in order to reduce construction costs and enhance economic performance. The design, however, increases flow velocity in the hot-leg piping and induces large flow turbulence around elbows. Therefore, flow-induced vibration (FIV) of a hot-leg piping is one of main concerns in the design. Numerical simulation is a useful method to deal with such a complex phenomenon. We have been developing numerical analysis models of the hot-leg piping using Unsteady Reynolds Averaged Navier-Stokes simulation with Reynolds stress model. In this study, numerical simulation of a 1/3 scaled-model of the hot-leg piping was conducted. The results such as velocity profiles and power spectral densities (PSD) of pressure fluctuations were compared with experiment ones. The simulated PSD of pressure fluctuation at the recirculation region agreed well with the experiment, but it was found some underestimation at other parts, especially in relatively high frequency range. Eigenvalue vibration analysis was also conducted using a finite element method. Then, stress induced by FIV was evaluated using pressure fluctuation data calculated by URANS simulation. The calculated stress generally agrees well the measurement values, which indicates the importance of precise evaluation of the PSD of pressure fluctuation at the recirculation region for evaluation of FIV of the hot-leg piping with a short elbow.

Predicting the integrity of large diameter stainless steel pipes using the R6 procedures

1987 ◽  
Vol 98 (3) ◽  
pp. 401-410 ◽  
Author(s):  
I. Milne ◽  
R.A. Ainsworth ◽  
G.G. Chell
Keyword(s):  
Stainless Steel ◽  
Large Diameter ◽  
Steel Pipes
Sign in / Sign up

Export Citation Format

Share Document