Numerical Simulation Study on Dynamic Performance of Basalt Fiber Reinforced Polymer Anchor under Impact Load
DOI:
https://doi.org/10.56748/ejse.24796Keywords:
Impact load, Basalt fiber reinforced polymer anchor, Dynamic performance, Numerical simulationAbstract
The construction safety of underground structures, such as deep foundation pits, is seriously threatened under conditions of explosion vibration and underground water flow. The basalt fiber reinforced polymer (BFRP) anchor offers advantages such as light weight, high strength, strong corrosion resistance, good insulation, and cleanliness without pollution. It is widely used in mines, foundation pits, slopes, reservoir embankments, and other areas. To study the dynamic performance of BFRP anchors under impact loads, the LS-DYNA numerical simulation software was used to analyze the dynamic mechanical response of BFRP anchors under different impact loads and multiple impact load conditions. The research results indicate that: (1) The BFRP anchor can withstand energy impacts exceeding 2.5 kJ. At this level, the deformation of the BFRP anchor undergoes three stages: elastic deformation, plastic deformation, and elastic deformation rebound. (2) The stress and displacement of the BFRP anchor increase continuously with the rise in impact energy, with the highest stress and displacement values occurring at the joint. (3) The BFRP anchor can endure three impacts with an energy of 1.25 kJ. During the first and second impacts, the stress and strain initially increase and then decrease over time. However, during the third impact, the BFRP anchor fractures and fails, with stress and strain increasing continuously over time. The research results provide theoretical basis and reference for foundation pit support and slope anchoring y under dynamic load in special engineering geology.
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