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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Seismic response of underwater fluid-conveying concrete pipes reinforced with SiO2 nanoparticles and fiber reinforced polymer (FRP) layer
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Seismic response of underwater fluid-conveying concrete pipes reinforced with SiO2 nanoparticles and fiber reinforced polymer (FRP) layer

机译：SiO2纳米粒子和纤维增强聚合物（FRP）层增强的水下输水混凝土管的地震响应

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摘要

This study aims at investigating the seismic response of the fluid-conveying concrete pipes reinforced with SiO2 nanoparticles and fiber reinforced polymer (FRP) layer. The earthquake acceleration is consistent with the earthquake occurred in Tabas. It is assumed that the structure is subjected to external forces which exerted by inner and outer fluids. The force due to the inner fluid is evaluated using Navier-Stokes equation. Also, Mori Tanaka model is employed to take into account the agglomeration effect of SiO2 nanoparticles. The mathematical model of the structure is developed based on the first order shear deformation theory (FSDT) and the governing equations are derived using energy method and Hamilton's principle. Finally, the problem is solved employing differential quadrature method (DQM) and Newmark method and the effect of different parameters like SiO2 nanoparticles agglomeration and volume percent, inner and outer fluids, various boundary conditions and geometric parameters on the dynamic deflection of the structure is studied. The results indicate that with increasing the thickness to radius ratio and volume fraction of SiO2 nanoparticles and also employing the NFRP layer, the dynamic deflection of the structure decreases while considering the effect of inner and outer fluids and agglomeration of SiO2 nanoparticles and increasing the length to thickness ratio increases the dynamic deflection of the structure.
机译：这项研究旨在研究用SiO2纳米颗粒和纤维增强聚合物（FRP）层增强的输液混凝土管道的地震响应。地震加速度与塔巴斯州发生的地震一致。假定该结构受到内部和外部流体施加的外力。使用Navier-Stokes方程评估内部流体产生的力。同样，采用Mori Tanaka模型来考虑SiO2纳米颗粒的团聚作用。基于一阶剪切变形理论（FSDT）建立了结构的数学模型，并使用能量法和汉密尔顿原理推导了控制方程。最后，采用微分求积法（DQM）和纽马克（Newmark）法解决了该问题，研究了SiO2纳米粒子的团聚和体积百分比，内外流体，各种边界条件和几何参数等不同参数对结构动力变形的影响。 。结果表明，随着SiO2纳米颗粒的厚度半径比和体积分数的增加以及使用NFRP层，结构的动态挠度减小，同时考虑了SiO2纳米颗粒的内，外流体和团聚的影响，并增加了长度。厚度比增加了结构的动态挠度。

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