Cracking in polymer concrete pipes-comparison of exact events in a pipe jacking project and numerical 3D modeling analyses

2014 ◽  
pp. 337-348
Author(s):  
K Pakiman ◽  
A Jenabi ◽  
Payam Sanjari ◽  
Babak Mohammadi
Keyword(s):  
3D Modeling ◽  
Polymer Concrete ◽  
Concrete Pipes ◽  
Pipe Jacking

scholarly journals Comparison of Cement-Based and Polymer-Based Concrete Pipes for Analysis of Cost Assessment

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Orhan Bozkurt ◽  
Mehmet İslamoğlu
Keyword(s):  
Cost Effectiveness ◽  
Construction Industry ◽  
Cost Efficiency ◽  
Mechanical Efficiency ◽  
Polymer Concrete ◽  
Cost Assessment ◽  
New Techniques ◽  
Concrete Pipes ◽  
The Cost ◽  
Innovative Techniques

As the variety of materials utilized in construction industry has expanded, new techniques have been used in order to optimize the quality and efficiency of output. Therefore, recent innovations taking place in the construction industry led researchers to increase the mechanical efficiency of the output more than the cost effectiveness of it. However, especially professionals experiencing in the industry look into the cost effectiveness of the work. In other words, they also want researchers to justify the innovative techniques economically. The aim of this study is to provide a comparative analysis of the cost efficiency of polymer concrete used to manufacture durable and long-lasting reinforced concrete structures.

scholarly journals Flow-Induced Stresses and Displacements in Jointed Concrete Pipes, Installed by Pipe Jacking Method

2019 ◽  
Author(s):  
Moses Karakouzian ◽  
Mehrdad Karami ◽  
Mohammad Nazari-Sharabian ◽  
Sajjad Ahmad
Keyword(s):  
Transient Flow ◽  
Transient Effects ◽  
Flow Conditions ◽  
Water Leakage ◽  
Pressurized Water ◽  
Transient Flows ◽  
Concrete Pipes ◽  
Induced Stresses ◽  
Pipe Jacking ◽  
Water Transmission

Transient flows result in unbalanced forces and high pressure in pipelines. Under these conditions, the combined effects of flow-induced forces along with sudden pipe displacements can create cracks in the pipeline, especially at the junctions. This situation consequently results in water leakage and reduced operational efficiency of the pipeline. In this study, displacements and stresses in a buried pressurized water transmission pipe installed by pipe jacking method are investigated using numerical modeling and considering interactions between fluid, pipe, and soil. The analyses were performed consecutively under no-flow, steady flow, and transient flow conditions, in order to investigate the effects of flow conditions on displacements and stresses in the system. Analyses of the results show that displacements and stresses in the jointed concrete pipes are significant under transient flow conditions. Moreover, because of pressure transient effects, maximum tensile stresses exceed the tensile strength of concrete at the junctions, leading to cracks and consequent water leakage.

scholarly journals Flow-Induced Stresses and Displacements in Jointed Concrete Pipes, Installed by Pipe Jacking Method

2019 ◽  
Author(s):  
Moses Karakouzian ◽  
Mehrdad Karami ◽  
Mohammad Nazari-Sharabian ◽  
Sajjad Ahmad
Keyword(s):  
Transient Flow ◽  
Transient Effects ◽  
Flow Conditions ◽  
Water Leakage ◽  
Pressurized Water ◽  
Transient Flows ◽  
Concrete Pipes ◽  
Induced Stresses ◽  
Pipe Jacking ◽  
Water Transmission

Transient flows result in unbalanced forces and high pressure in pipelines. Under these conditions, the combined effects of flow-induced forces along with sudden pipe displacements can create cracks in the pipeline, especially at the junctions. This situation consequently results in water leakage and reduced operational efficiency of the pipeline. In this study, displacements and stresses in a buried pressurized water transmission pipe installed by pipe jacking method are investigated using numerical modeling and considering interactions between fluid, pipe, and soil. The analyses were performed consecutively under no-flow, steady flow, and transient flow conditions, in order to investigate the effects of flow conditions on displacements and stresses in the system. Analyses of the results show that displacements and stresses in the jointed concrete pipes are significant under transient flow conditions. Moreover, because of pressure transient effects, maximum tensile stresses exceed the tensile strength of concrete at the junctions, leading to cracks and consequent water leakage.

scholarly journals Flow-Induced Stresses and Displacements in Jointed Concrete Pipes Installed by Pipe Jacking Method

Fluids ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 34 ◽  
Author(s):  
Moses Karakouzian ◽  
Mehrdad Karami ◽  
Mohammad Nazari-Sharabian ◽  
Sajjad Ahmad
Keyword(s):  
Transient Flow ◽  
Transient Effects ◽  
Flow Conditions ◽  
Water Leakage ◽  
Pressurized Water ◽  
Transient Flows ◽  
Concrete Pipes ◽  
Induced Stresses ◽  
Pipe Jacking ◽  
Water Transmission

Transient flows result in unbalanced forces and high pressure in pipelines. Under these conditions, the combined effects of flow-induced forces along with sudden pipe displacements can create cracks in the pipeline, especially at the junctions. This situation consequently results in water leakage and reduced operational efficiency of the pipeline. In this study, displacements and stresses in a buried pressurized water transmission pipe installed by pipe jacking method are investigated using numerical modeling and considering interactions between fluid, pipe, and soil. The analyses were performed consecutively under no-flow, steady flow, and transient flow conditions, in order to investigate the effects of flow conditions on displacements and stresses in the system. Analyses of the results show that displacements and stresses in the jointed concrete pipes are significant under transient flow conditions. Moreover, because of pressure transient effects, maximum tensile stresses exceed the tensile strength of concrete at the junctions, leading to cracks and consequent water leakage.

A Model Is Worth 1,000 Pictures: Applications of 3D-Modeling in Skull Base Surgery Neuroanatomy Education

2020 ◽  
Author(s):  
Christopher S. Graffeo ◽  
Avital Perry ◽  
Lucas P. Carlstrom ◽  
Michael J. Link ◽  
Jonathan Morris
Keyword(s):  
Skull Base ◽  
3D Modeling ◽  
Skull Base Surgery

3D modeling of the vascular system

2016 ◽  
Vol 1 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Jean François Uhl ◽  
Maxime Chahim ◽  
François Cros ◽  
Amina Ouchene ◽  
◽  
...  
Keyword(s):  
Augmented Reality ◽  
3D Modeling ◽  
Vascular System ◽  
Arterial System ◽  
Chronic Venous Disease ◽  
Venous Disease ◽  
Software Products ◽  
Operative Planning ◽  
Morphological Modeling ◽  
Pre Treatment

The 3D modeling of the vascular system could be achieved in different ways: In the venous location, the morphological modeling by MSCT venography is used to image the venous system: this morphological modeling tool accurately investigates the 3D morphology of the venous network of our patients with chronic venous disease. It is also a fine educational tool for students who learn venous anatomy, the most complex of the human body. Another kind of modeling (mathematical modeling) is used to simulate the venous functions, and virtually tests the efficacy of any proposed treatments. To image the arterial system, the aim of 3D modeling is to precisely assess and quantify the arterial morphology. The use of augmented reality before an endovascular procedure allows pre-treatment simulation, assisting in pre-operative planning as well as surgical training. In the special field of liver surgery, several 3D modeling software products are available for computer simulations and training purposes and augmented reality.

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