摘要
鉴于传统强度折减法对岩土体强度参数(粘聚力和内摩擦角)进行等系数折减,难以真实反映岩土体稳定性的缺点,以某库岸复杂岩质边坡为例,运用大型有限元软件ADINA,建立边坡有限元模型进行动力分析,采用双折减系数法计算地震荷载作用下边坡的地震响应,研究粘聚力和内摩擦角的折减关系,得出了边坡的动力稳定安全系数,并与传统的强度折减动力分析法进行对比。结果表明,传统的强度折减动力分析法可能稍有夸大边坡的安全裕度;采用双折减系数法进行动力稳定分析可行且更合理。研究成果可为边坡动力稳定分析提供参考。
Traditional strength reduction method uses the same reduction factor for strength parameters（cohesion and friction）of rock and soil,and it cannot truly reflect the stability of rock.Therefore,dual reduction factor method was used to analyze the dynamic stability of the slope.Taking a complex rock slope of a reservoir for an instance,a dynamic analysis model was established based on ADINA.In this way,the seismic dynamic response of the slope under action of earthquake was calculated based on dual reduction factor method.And the reduction relationship between cohesion and friction was researched.Then the dynamic stability safety factor was obtained and compared with the traditional strength reduction dynamic analysis method.The results show that the traditional strength reduction method may exaggerate the safety margin of the slope slightly and the strength reduction dynamic analysis of the slope based dual reduction factor method is feasible and more reasonable.The research results can provide reference for slope dynamic stability analysis.
出处
《水电能源科学》
北大核心
2018年第3期141-144,140,共5页
Water Resources and Power
