地震荷载作用下岩石边坡崩滑响应建模分析-华南地震

文章信息/Info

Title:: Modeling Analysis of Rock Slope Collapse Response under Seismic Load

Author(s):: WU Qiang; (Fujian Institute of Geotechnical Engineering Investingation and Surveying Co. , Ltd.,Fuzhou 350001,China)

摘要:: 现有的边坡崩滑响应分析模型大多为统一性分析模型 , 无法对地震载荷作用下的边坡进行分层分析 ,其结果误差较大。为了适应当前边坡工程需要 , 设计基于数值模型 , 提出了一种多层化分析模型。设计首先构建的基础性数值模型 , 根据边坡岩层划分不同的数据层 , 标注对应物理参数 , 设定虚拟网格尺寸和阻尼数据 , 提出横向纵向不同的监测点数据组 , 在初始数值模型基础上 , 输入动力条件 , 包括地震载荷入射角 ,S波 P 波效应数据 , 构建完整的数值分析模型 , 应用模型分别从辩驳崩滑上方向和水平方向提取响应特征 , 构建振动时程曲线 , 完成多方向边坡崩滑响应分析。选择粘聚力作为实验测评指标 , 在实验环境下构建数值模型 , 并与 AGA 模型对比 , 对比结果显示设计模型的分析结果更趋于真实性 , 证明该分析模型真实有效 , 值得进一步推广研究。

Abstract:: Most of the existing slope collapse response analysis models are unified analysis models,which are unable to conduct stratified analysis of the slope under the action of seismic load,and the result error is large. In order to meet the needs of slope engineering,a multilayer analysis model is proposed based on numerical model. Design firstly builds the basic numerical model,according to the division of rock slope of different data layer,with corresponding physical parameters,set the virtual data grid size and damping, and sets transverse longitudinal data sets of different monitoring sites. On the basis of initial numerical model,the input power conditions ,including earthquake load angle of incidence,effect data of P ware and S ware,the paper builds the complete numerical analysis model and application model respectively from the contentious collapse direction and horizontal direction response feature,constructs vibration time history curve,and complets slope collapse response analysis,exacts from multiple directions. The cohesion force is selected as the experimental evaluation index ,and the numerical model is built in the experimental environment,and compared with the AGA model. The comparison results show that the analysis results of the design model tends to be more authentic,proving that the analysis model is true and effective,which is worth further promotion and research.