Numerical parametric study on the propagation of longitudinal waves in GRFP bolts
Jung-Doung Yu,Namsun Kim,Hyung-Koo Yoon,Thomas H.-K. Kang,Jong-Sub Lee
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
PDF Viewer
Preview is limited to the first 3 pages. Sign in to access the full PDF.
