Analysis for dynamic response of traveling-wave excitation and uniform excitation on high rock slope under earthquake action
[Objective]Under the action of seismic forces,unstable failure of rock slopes can lead to significant economic losses and casualties.Conducting research on the dynamic response and stability of rock slopes under seismic forces,considering the effects of seismic waves,holds important engineering applications.[Methods]This paper employs numerical simulation method,with natural seismic loads,to analyze the dynamic response patterns of rock slopes under both uniform excitation and traveling wave excitation.[Results](1)Under both excitation method,the sliding surface is formed by the shear slip zone inside the slope and a certain vertical depth of tensile failure zone at the slope top.(2)Concerning the dynamic response of the slope,un-der uniform excitation,there is a significant topographic amplification effect on the slope's acceleration,velocity,and displace-ment.However,under traveling wave excitation,this elevation amplification effect is only evident near the slope surface.(3)Un-der uniform excitation conditions,the horizontal and vertical permanent displacements at the slope shoulder and near the middle of the slope surface are much larger than the horizontal and vertical permanent displacements under traveling wave excitation.The per-manent displacement under uniform excitation is 4.85 to 5.34 times that of traveling wave excitation.[Conclusion](1)The differ-ent excitation method do not affect the failure mode of the slope under seismic action,and the formation of the sliding surface is gradual.(2)The simulation result under uniform excitation are more conservative compared to those under traveling wave excita-tion.(3)Under the conditions of a traveling wave excitation,the propagation characteristics of seismic waves within the slope and near the free surface undergo significant changes.The research findings in this paper reveal the impact of seismic wave traveling wave effects on the dynamic response of rock slopes,providing valuable references for engineering design and construction.
high rock slopeuniform excitationtraveling-wave excitationtopographic amplification effectdynamic responsenumerical simulation
万方数据
维普
