Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Computers and Concrete Volume 20, Number 6, December 2017 , pages 711-718 DOI: https://doi.org/10.12989/cac.2017.20.6.711 |
|
|
|
Theoretical and experimental analysis of wave propagation in concrete blocks subjected to impact load considering the effect of nanoparticles |
||
Hassan Bakhshandeh Amnieh and Mohammad Saber Zamzam
|
||
| Abstract | ||
| Nanotechnology is a new filed in concrete structures which can improve the mechanical properties of them in confronting to impact and blast. However, in this paper, a mathematical model is introduced for the concrete models subjected to impact load for wave propagation analysis. The structure is simulated by the sinusoidal shear deformation theory (SSDT) and the governing equations of the concrete model are derived by energy method and Hamilton\'s principle. The silicon dioxide (SiO2) nanoparticles are used as reinforcement for the concrete model where the characteristics of the equivalent composite are determined using Mori-Tanaka approach. An exact solution is applied for obtaining the maximum velocity of the model. In order to validate the theoretical results, three square models with different impact point and Geophone situations are tested experimentally. The effect of different parameters such as SiO2 nanoparticles volume percent, situation of the impact, length, width and thickness of the model as well as velocity, diameter and height of impactor are shown on the maximum velocity of the model. Results indicate that the theoretical and experimental dates are in a close agreement with each other. In addition, using from SiO2 nanoparticles leads to increase in the stiffness and consequently maximum velocity of the model. | ||
| Key Words | ||
| concrete model; impact load; mathematical model; SiO2 nanoparticles; experimental test | ||
| Address | ||
| Hassan Bakhshandeh Amnieh: School of Mining, College of Engineering, University of Tehran, Iran Mohammad Saber Zamzam: Department of Mining Engineering, Faculty of Engineering, University of Kashan, Iran | ||