摘要
运用离散元软件3DEC,通过研究结构面在地震波作用下,其产状、起始位置、刚度以及密度与岩体边坡PGA放大系数峰值变化关系,揭示岩体边坡中的结构面对地震动力响应特征的影响规律。结果表明:结构面倾角增大,岩体边坡的动力稳定性变差;结构面起始位置越高,岩体边坡的地震动力响应则越强,反之则越弱;结构面刚度能影响地震波的能量分配关系,但不能改变其传播路径;结构面发育越密集,岩体边坡地震动力响应越强烈,动力稳定性也就越差。
Through research on the variable relationship between occurrence,starting position,stiffness and density and PGA amplification coefficient of the peak under the action of seismic waves,the discrete element3 DEC software is used to reveal the influence rule on characteristic for the seismic dynamic response of structural surface of rock slop. Results show that： the bigger the dip angle of structural surface is; the worse the dynamic stability of rock slope is; the higher the starting position of structural surface is,the stronger the seismic dynamic response of rock slope is,vice versa. The structural stiffness can affect energy distribution relationship of seismic wave,but cannot change its travel path. The more intensive the structural surface development is, the stronger the seismic dynamic response of rock slope is, and the worse the dynamic stability is.
出处
《路基工程》
2016年第1期39-43,共5页
Subgrade Engineering
关键词
结构面
岩体边坡
动力响应
PGA
影响因素
structural surface
rock slope
dynamic response
PGA
influence factor
