强震下岩质边坡可靠度动力安全系数的确定

Determination of Reliability Dynamic Safety Coefficient of a Rock Slope Under Strong Earthquake

将天津地震波输入到岩质非均质边坡模型中,运用ANSYS大型通用软件对其进行时程动力分析。通过通用后处理器进行编程处理,获得边坡的动安全系数分布云图,得到动安全系数。结合可靠度理论,提出可靠度动安全系数的概念,给出了强震作用下的岩质边坡动安全系数稳定性评价指标的计算方法。并对动安全系数分布云图上显示的动安全系数进行稳定性评价。结果表明:边坡可靠度动安全系数能够较好地考虑工程风险,是可靠的。

Tianjin seismic waves were inputted to a inhomogeneous rocky slope model,and the slope was analyzed by time-history method using general-purpose software ANSYS.In the POST1,dynamic safety factor distribution chart was calculated through programming,and then the dynamic safety factor was obtained.Based on reliability theory,the authors proposed the concept of reliability dynamic safety coefficient,and calculation method of the stability evaluation index of rock slope dynamic safety coefficient under the action of strong earthquake was given.Besides,the dynamic safety coefficient on dynamic safety coefficient distribution chart was identified.Results showed that the dynamic safety coefficient slope reliability can be reliable under the consideration of project risk.