摘要
承灾体易损性定量评估是制约滑坡灾害风险评估研究的瓶颈问题。为此,以滑坡体冲击冲量为致灾强度指标、建筑物整体抗剪力为抗灾性能指标,推导出典型承灾体易损性定量评估模型。在此基础上,考虑滑体运动特征参数随机性对易损性的影响,提出风险曲线和最大风险度指标的概念,以反映滑坡灾害成灾全过程中不确定性对灾害后果的影响。并采用该模型分析了坡体几何特征参数、受灾体空间位置以及受灾体抗灾性能对易损性的影响规律。将风险度指标应用于算例分析,并与以往方法进行了比较,分析发现,建立的易损性定量评估模型可以反映二维简化情况下受灾体毁损程度与各种影响因素之间关系的基本规律,为易损性定量评估提供了一种途径。
Quantitative assessment of vulnerability for hazard bearing body is a difficult problem in landslide risk assessment. Taking impulse of landslide impact as disaster-causing strength index and taking whole shear force of building as disaster-resisting performance index, the quantitative assessment model for vulnerability of typical hazard bearing body is deduced. On this basis, considering the influence of randomness of movement parameter on vulnerability, the risk curve and maximum risk index are put forward so as to reflect the influence of uncertainty in process of landslide hazard. Influence of geometrical parameters of slope, space location and disaster-resisting performance of hazard bearing body on vulnerability are analyzed based on the model. Using risk index for case study and comparing with the existing methods, the quantitative assessment model can reflect the relationship between damage degree of hazard beating body with each influential factor in two-dimension condition. The model provides a new way for quantitative assessment of vulnerability.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2011年第8期2487-2492,2499,共7页
Rock and Soil Mechanics
基金
成都理工大学地质灾害防治与地质环境保护国家重点实验室开放基金(No.GZ2007-04)
科技导报社博士生创新研究资助基金(No.kjdb20090101-3)
后勤工程学院研究生创新基金资助项目(No.LEU2007-01)
关键词
滑坡灾害
易损性
风险评估
landslide hazard
vulnerability
risk assessment
