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Steel and Composite Structures Volume 49, Number 3, November 10 2023 , pages 349-359 DOI: https://doi.org/10.12989/scs.2023.49.3.349 |
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On dynamic response and economic of sinusoidal porous laminated nanocomposite beams using numerical method |
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Guixiao Xu and F. Ming
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| Abstract | ||
| Dynamic response and economic of a laminated porous concrete beam reinforced by nanoparticles subjected to harmonic transverse dynamic load is investigated considering structural damping. The effective nanocomposite properties are evaluated on the basis of Mori-Tanaka model. The concrete beam is modeled by the sinusoidal shear deformation theory (SSDT). Utilizing nonlinear strains-deflection, energy relations and Hamilton's principal, the governing final equations of the concrete laminated beam are calculated. Utilizing differential quadrature method (DQM) as well as Newmark method, the dynamic displacement of the concrete laminated beam is discussed. The influences of porosity parameter, nanoparticles volume percent, agglomeration of nanoparticles, boundary condition, geometrical parameters of the concrete beam and harmonic transverse dynamic load are studied on the dynamic displacement of the laminated structure. Results indicated that enhancing the nanoparticles volume percent leads to decrease in the dynamic displacement about 63%. In addition, with considering porosity of the concrete, the dynamic displacement enhances about 2.8 time. | ||
| Key Words | ||
| DQM; dynamic response; laminated concrete porous beam; nanoparticles; newmark method | ||
| Address | ||
| Guixiao Xu:School of Digital Economy and information management, Chongqing College of Mobile Communication, Hechuan 401520, Chongqing, China F. Ming:Department of Mechanical Engineering, University of Hong Kong, Hong Kong | ||