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Steel and Composite Structures Volume 53, Number 6, December 25 2024 (Special Issue) pages 653-664 DOI: https://doi.org/10.12989/scs.2024.53.6.653 |
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Numerical parametric study on the propagation of longitudinal waves in GRFP bolts |
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Jung-Doung Yu, Namsun Kim, Hyung-Koo Yoon, Thomas H.-K. Kang and Jong-Sub Lee
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| Abstract | ||
| This study investigates the propagation of longitudinal waves in Glass-Fiber-Reinforced Polymer (GFRP) rock bolts using numerical simulations. A two-dimensional axisymmetric model was used to represent the rock bolts. The simulations examined the effects of grout and rock on wave propagation, focusing on how these materials influence the temporal and spectral characteristics of the reflected longitudinal waves. The study also explored the impact of varying excitation frequencies on wave characteristics. Results show that the wave velocity increases with the elastic modulus of either grout or rock, with changes in the elastic modulus of grout only slightly affecting velocity, while changes in rock modulus significantly influence it. Additionally, wave velocity in the rock bolt decreased gradually as rock thickness increased. | ||
| Key Words | ||
| dispersion; GFRP; longitudinal wave; rock bolt; wavelet transform | ||
| Address | ||
| Jung-Doung Yu:Department of Civil Engineering, Jeonbuk National University, Jeonju 54896, Korea Namsun Kim:School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, Korea Hyung-Koo Yoon:Department of Disaster Prevention and Safety Engineering, Daejeon University, Daejeon 34520, Korea Thomas H.-K. Kang:Department of Architecture & Architectural Engineering, Seoul National University, Seoul 08826, Korea Jong-Sub Lee:School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, Korea | ||