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Advances in Concrete Construction Volume 9, Number 3, March 2020 , pages 327-335 DOI: https://doi.org/10.12989/acc.2020.9.3.327 |
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Dynamic stress response in the nanocomposite concrete pipes with internal fluid under the ground motion load |
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Behrooz Keshtegar, Javad Tabatabaei, Reza Kolahchi and Nguyen-Thoi Trung
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| Abstract | ||
| Concrete pipes are considered important structures playing integral role in spread of cities besides transportation of gas as well as oil for far distances. Further, concrete structures under seismic load, show behaviors which require to be investigated and improved. Therefore, present research concerns dynamic stress and strain alongside deflection assessment of a concrete pipe carrying water-based nanofluid subjected to seismic loads. This pipe placed in soil is modeled through spring as well as damper. Navier-Stokes equation is utilized in order to gain force created via fluid and, moreover, mixture rule is applied to regard the influences related to nanoparticles. So as to model the structure mathematically, higher order refined shear deformation theory is exercised and with respect to energy method, the motion equations are obtained eventually. The obtained motion equations will be solved with Galerkin and Newmark procedures and consequently, the concrete pipe\'s dynamic stress, strain as well as deflection can be evaluated. Further, various parameters containing volume percent of nanoparticles, internal fluid, soil foundation, damping and length to diameter proportion of the pipe and their influences upon dynamic stress and strain besides displacement will be analyzed. According to conclusions, increase in volume percent of nanoparticles leads to decrease in dynamic stress, strain as well as displacement of structure. | ||
| Key Words | ||
| dynamic response; soil medium; fluid; damping; nanoparticles | ||
| Address | ||
| Behrooz Keshtegar: Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Viet Nam Javad Tabatabaei: Department of petroleum engineering and geology, Meymeh branch, Islamic Azad University, Meymeh, Iran Reza Kolahchi: Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam Nguyen-Thoi Trung: Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Viet Nam | ||
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