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Numerical Simulation on Seismic Response of the Filled Joint under High Amplitude Stress Waves Using Finite-Discrete
Xiaolin Huang1,2, Qi Zhao3, Shengwen Qi4
1Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China. huangxiaolin@mail.iggcas.ac.cn.
Materials (Basel, Switzerland)
|August 5, 2017
Summary
This study numerically investigates seismic wave propagation through filled joints. High amplitude stress waves cause particle crushing, significantly impacting wave transmission and joint behavior.
Area of Science:
- Geotechnical Engineering
- Computational Mechanics
- Seismology
Background:
- Understanding seismic wave interaction with geological joints is crucial for infrastructure safety.
- Filled joints exhibit complex behaviors under dynamic loading, requiring advanced numerical methods for accurate simulation.
Purpose of the Study:
- To numerically investigate the seismic response of filled joints under high amplitude stress waves.
- To analyze the influence of joint thickness and incident wave characteristics on wave propagation and particle deformation.
Main Methods:
- Combined Finite-Discrete Element Method (FDEM) for simulating particle behavior and wave propagation.
- Delaunay triangulation for meshing polygonal particles, allowing for crushing simulation.
- Numerical analysis of 1D longitudinal wave propagation through a single filled joint.
Main Results:
- Filled particles exhibit three deformation stages: initial compaction, crushing, and combined crushing-compaction.
- Wave transmission coefficient increases with incident wave amplitude during compaction stages but decreases during the crushing stage.
- Increased wave frequency and filled joint thickness reduce the transmission coefficient and hinder particle crushing.
Conclusions:
- Particle crushing is a key energy dissipation mechanism in filled joints under seismic loading.
- The deformation stage significantly influences the relationship between wave amplitude and transmission.
- Joint thickness and wave frequency are critical parameters affecting seismic wave attenuation in filled joints.
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